SERVICE MANUAL - Prince Manufacturing Corp.
Contents
1. SW31L WAS 0ZdS MOWd 021 Loszosoog 900909008 90505009 910505008 950505005 901505005 900505005 901605005 s p 802000 Z 8045 J3unSS3tud AIW WAS LIVHS 08 1S00S d sr ovz 90208008 900908008 90809008 910909005 90909005 901909005 00909005 90109009 g w 180200041 02 90245 qis 1V3S LJVHS 00SZ S00S L SL dis 101219008 abl 090 009708008 00909009 0505009 710908008 790809009 701505005 700505005 70109009 v 990200041 9 8024 qwas 0002 9009 4 L 090 009708008 00909009 70809009 eLososoos S0S0S00S 01505005 00909009 0109009 v 990200021 1 80295 Nu3HSVM luVHO 33S zL 6006 605006 606006 60606006 S0S00S 606006 60065 Li Z EE TERN SZS268009 090 00820008 20090900 7050500 21090900 29090900 20190900 20090900 2010900 97 280200041 L1 90295 1dVHS Q3A3 8 6 70909009 LL 090 009708008 100909009 10805009 110505008 150505005 101908009 100909009 LOLEOSOOS 5 76 2802000 1 6 90295 MHL 0907 YIHSYM 009208008 e oL 021 10908008 00090900S 070509009 010508009 080509009 001508009 000805009 00109009 s 80200041 8 90295 BY SOS IIE ds i 090 010909009 219909009 19909009 019909009 119909009 91008009 ose 9 g0zds 1NVHO 33S L 8 0902009203009 OSE 1Z00041 Ados lHVHO 33S L 2 WALI L WALI AYA 3NI1dS 1 0 AYA GSASM Atiq 3NI1dS LiL AYA GSAS S S AYGANITdS L6 2 WALI2. lt 55 IYS LHvHS 909219009 L 9 015 7 39 LavHS 109218009 9L 09 020008 902908008 9009009 902209009 902605008 9 990z0004L ZS vSzdS Was 050215005 SV was z api 908408008 80908009 soO rOS00S S0Zr0S00S 90208009 9 902000 vv VSZdS 1415 00115005 L 702909008 O rOS00S 702705005 702605005 190200041 8 VSZdS VvSZdS 3ividMV3M 010008008 09 COGEOSDUS ae 14VHS QHAZD8 MO4 AI 80909009 021 10208009 0Z90S00S 606709009 0Z0S00S 0Z 0S00S g 80Z000L VSZdS SLHOd HV3SH NOLLV LOMH N3HSVM l1NVHO33S 8 0L JSIWMOO1T25 dNnd 624 IHVH233S L 6 09 2020008 202909008 206709005 Z0Zr0S00S 20209009 S 8020001 ZZ PORA r a 090 00208008 102909008 10709005 10708009 102609009 180200011 ZZ vSZdS ASSVASVOONIMV3E 010209009 c 9 021 1020008 002909008 00 09005 002709009 00209009 1802000 1 61 VSZdS alvid ova 0ZSL0S00S L 31V1d INOSJ 080108008 v OL WALI SH3HSVM Y37901 AYA GSAS 8 2 Aud ANIIdS LEL 1 S1709 3ZIS ONIY dvNS LELLOOOEZ L 8 WALI YY39 SNId 13MOG 4 0001061 v 11708 lNVHO 33S 8 L NOIl1dl3dOS3q AIO WALI L4VHS dO SNIOV3 NOLLV LOMH a343 15 8 2 3VS dis LIINI 3NI 1dS 9 HLOOL L 3VS L LAVHS 11O8 V 3VS
3. 700209009 c 9 WALI L WALI AU GS 0600 T 739 S3001 ANG 3NI1dS LOL ANO G3A33 AYA ANITAS L AYA 16 4 WALI Aqog 61109 IZIS 31V1d LNOWS 010109009 L r ONIY dVNS SZLLOO0 Z L WALI YY39 SNId 1 0001061 r z i 1108 lNuvHO 33S L 1 338 N ALO WALI 3SIM090197 LJVHS JO SNIOV3 NOLLVLOS ANNAS 2 91 LOL 3VS S Q3A3 LH9IVHLS 3NI aS 2 91 HLOOL LL G3A33 15 8 6 3VS 2 9l HLOOL 6 AVS 6 LAVHS SANG 1108 2 V 3VS H ONILNNOW SLYOd QHVONVIS 6 3dAL LHOd 3diS ova NO 1311nO 9 LIINI HV3H Q NOLLVOO T 1904 3009 LNAWSOVIdsIG MX H 6 Xx g0 dS N Javn N 3ovduns ON 9015 MOTIVHS H1OO1 4V39 dO AIS JAYA 191110 H1OO1 dO aqls als 13TNI NO du 9 NOILV LOM 21 090 00940800 600909009 610505005 650606005 601809008 600909008 60109008 s 802000 802dS T H6V 9045 SLYOd 3qIS NOILV LOS opz 909 000 800909009 80809009 810505005 890908008 801505005 800909009 80109009 s 8000 1 0 90295 3SIMM20O 19 802dS 209108009 200909009 10809009 110505008 1805058005 101505005 20080008 20109009 s 80 000 1 Z 90295
4. 209209009 20290800 20 0 900 02 05005 20809009 g 80200041 42 YSZdS 33S L 6 S ASIMMOO10 dWINd 684 ino ada P E CE Ie eg 7 090 009208009 10290800 10 0 900 LOZVOSO0S Loeeosoos S y 180200041 ZZ 9245 Aaog lNHVHO 33S L ASSV3SVO 0102090065 9 021 109208009 002908008 00 09009 002708009 0009009 18020001 61 VS dS MOVE 129105005 L 8 avd Nous 0870109009 v 0L WALI Su3HSvM YY39 ANC Q3A3 8 7 Aud ANITAS LE WILI AGOS 1 WALI S1709 3215 ONIN dVNS 11 0002 L 8 SNId 4 0001061 v lNHVHO 33S 8 L NOlLdlH0 3G WSHWON IHVd ALO WALI 3SIMMOO 7197 LJVHS 40 ONIOVS NOILVLOY Q3A3 LHOIVYLS 8 3VS ANMdS 9 HLOOL 3VS L LAVHS 3AIHG 11O8 V 3VS H S1HOd GYVGNVLS 6 3dAL LHOd Adis LIINI 180d TIVWS 1971110 aaisxova Z NO MOMUV 9 Pa 191100 LIINI 3GIS V NOLLVOO 1 1404 3009 WX H 6 V XX VScdS ON SdO1S MOTNHS 6 HioOlNV3O dO 31140ud 5 TIV13G LaILNO _ LAIN 3qQIS131NI ALIAVO HLOOL dO 3dIS L3 INI N3AIHO NON NO 1N0Y30NN 43H NOILV LOM 24 SNW31I WAS S dS HONd 090 0090009 20909009 10709009 10209009 10209009 9 890200041 9 vSZdS
5. LHOIY V OL dNNd 5 1 LYSANO9 OL q3OVld3H 38 LSNW ALV 1d 2 NOLLVLOM ASIMMOOTOYNSLNNOOD GNVH 1431V SI SIHL TIVWS 191100 y AdisMova NO MOHMNV S 1V3S dO 3GISNI OL 309 15 TIVWS 131100 lt TVNOLLdO 4 l3VHS H3 ldl dol NO SI O9O13ONIHd dais LAIN NOILVLOY MO d LNOLAD NOUV 901d ONIHV38 ALV1d YVAM INOLLOS NO SI 0901 3ONIHd NOLLV LOH M99 NOILV LOM 3SIMo2019 QNVH LHOIY V OL SIHL LM3ANOO OL Q3ov 1d3s LSNW NOIL V LOM ASIMYOOTONS LNNOD GNVH 1331 V SI SIHL dais LIN ALIAVO 3qIS 131NI NOILVSHDOIJ3NOO 1591 LYOd 398V L3TNI uvas 1VNOLLdO 16 F TESTING In order to confirm performance and insure quality all pumps that have been disassembled and then reassembled with either the same or different components need to be tested on a suitable pump test stand Contact Prince Manufacturing for test stand requirements To pass the test the flow from the pump must exceed a minimum value at a given rpm and pressure Perform the test as follows 1 Wipe off any excess oil on the pump and shaft seal so that any leakage that might occur during the test will be visible 2 Mount the pump to the test stand insuring that the correct drive shaft coupler is being used 3 Connect the inlet and outlet lines to the
6. AOS IZIS ASSY YAIMYVO SNINV3S 700209009 z 9 SHIHSYM s1708 105108005 L 9 31V1d INOHJ 000108008 L r yao AIMO ONIY dVNS 921 000 L on SNId 260001061 r z LYWHO 33S r L LYVd ALO WALI VIN 3OVANNS LNOSJ 3SIMMOO TOH31NA0271 L4VHS ONIOVA NOILV LOH 3NI1dS 2 91 LOL 3VS S gals LIINI Q3A3M LH IV31S 5 9 HLOOL LL NEUEM Q3A3M LHOIVYLS 8 6 AVS Z J 3NI dS Z 91 HLOOL 6 3VS 6 L4VHS M asova V 3VS H ONILNNOW NO MONEY S1HOd QHVONVIS 6 3dAL LYOd 191100 8 L3TINI 3GIS V NOLLVOOT LHOd 3009 1N3W3OV dSIa 4vao HLOOL 40 3dis SAY N3AISQ NON NO 1noH3aNn 338 131100 LNOYAGNN ON gals 39015 MOTIVHS _ HLOOL dO JAIS INYA 7 NOILV LOY 22 c EN 090 006 06006 600906006 610606006 660606006 601606006 600606006 600 0S00S 80Z000ZL gOZdS T Hed g0ZdS SLHOd SV3SH NOILLV LOH 3SIMM20712 YSLNNOD dWNd 4024 Otz 9090009 80090S00S 870509008 810505005 850505005 801908008 800909009 80009009 s 802001 06 90295 ose 2090009 200908008 170805005 110505005 1590808005 101808005 100808008 200 0S00S s 80Z000L1 ZZ 90295 SWIL WAS OZdS AINd 021 109109009 900908009 970808009 910505006 980908008 901908008 900908008 900808009 S y 180200041 Z 80 5 55 a
7. The exploded views and parts listings can be used for reference If the rotation direction of the pump is to be changed the rotation change instructions Section E should be used D REASSEMBLY with same rotation direction 1 Ifthe shaft seal has been removed insert a new shaft seal and snap ring into the front cover Lubricate the outside of the seal with oil before installation To insure that the seal remains square to the bore and is not damaged during installation an arbor SEAL press and seal insertion tool should be INSERTION used during installation The side of the seal containing the spring goes to the inside of the pump 2 Lay out the gears bearing carriers and wear plates SP25 only orientated in the manner in which they came out of the pump SEAT SEAL TO BOTTOM OF BORE ARBOR PRESS MOUNTING FACE GEAR TOOTH ORIENTATION EXAMPLE LEFT HAND ROTATION CCW RIGHT HAND ROTATION CW FACING DRIVE SHAFT END FACING DRIVE SHAFT END ROTATION Re ROTATION REF UNDERCUT N NO ON NON DRIVEN DRIVE SIDE PROFILE Cx SIDE OF TOOTH Z OF GEAR TOOTH b dc SHALLOW SLOPE Ve f ARG SIDE NO UNDERCUT Js OUTLET Uf NA INLET INLET Dow OUTLET 4 DRIVE SIDE PROFILE OF GEAR TOOTH i SHALLOW SLOPE SIDE NO UNDERCUT IDLER GEAR J XN REF UNDERCUT ON NON DRIVEN SIDE OF TOOTH The pump gears have non symmetrical teeth with different profiles on each side The
8. S YSZdS S 027 909109009 9090900 590905009 02909009 800009 gs 29000011 vv VSZdS z OSP 0 008 _f0Z90S00S 0 09008 702505005 70 050059 S S 902000 1 8 VSZdS L u 0zL Logzosoog EOZ90S009S 0905009 ozsoso0s goeeosoos g 8 000 1 ZE VSzZdS x ose zogzosoos ZOZ90S00S 20905009 Z0ZS0S00S ZOEE0SO0S g 80Z000LL ZZ YSZdS 090 009405008 10908009 1008008 102805005 Loeeosoos sy 1802000 1 22 YSZdS z 9 0zL Logzosoos 00909008 00905009 00ZS0S00S 00 0S00S S Y 1802000 1 6L VSZdS 0 WALI YY39 AYA 8 2 AYO INTAS LEL L WALI 1 3215 8 WALI 9 8 L 3GIS LIINI fi A9YV1 LIINI Z qdSwova 7 MOMNV 9 HLOOL dO N3AIHO NON NO L3 NI In OWH3Q0ND733H ALIAVO 131100 LNOYSGNN ON adis 3dO1S MOTIVHS HLOOL dO adis NOILYLO 26 SWALI WAS S dS MOWd A SYNSS3Yd GSW 1V3S LJvHS 909219009 L a1s 1V3S 14VHS 108219009 L qwas 050215005 PE was 160219009 4 1 5 001219009 51 HV3H 3lviduvaM 0100 9008 13VHS GSAS 8 90909009 L NOLLV LOH 3SIAMOO IO M3HSVM l1NVHO33S 9 LYWHO 33S L YALNNOO dINNd ScdS 33S L Agog 33S
9. appreciable depth The tracked areas should appear to have a fairly fine grained and relatively smooth surface finish If the finish is rough or pitted or if there is evidence of APPROXIMATELY 1 3 OF TH scoring the body is damaged and the pump PES may not build full pressure or flow Also if the bearings and shaft Journals show excessive wear the teeth will have tracked into the body too far and again the pump may not build full pressure or flow The pump body is not available as a service part 2 Drive Gear and Idler Gear The shaft and side surfaces of the gear should exhibit a very smooth contact pattern If the contact pattern on the shaft or the gear sides shows signs of scoring the gear should be replaced If the gears show any discoloration due to heat the gears should be replaced Signs of contact and minor scratching on the profiles of the teeth are normal However if there is excessive or uneven wear or if there is excessive pitting the gears should be replaced 3 Wear plates SP25 only The wear plates consist of a bronze layer over a steel backing The bronze layers will normally exhibit some bright burnished areas due to contact with the sides of the gears If there is significant scoring on the bronze surface or the if surface is rough or if any of the bronze surface has been chipped off the plates should be replaced If the plates are not flat or if there is evidence of heat build up the steel side of t
10. levels above the specifications may cause sudden and unexpected failure of a component in the hydraulic system The failure may result in serious personal injury Always use a gauge when adjusting a relief valve TABLE OF CONTENTS SECTION TITLE PAGE A GENERAL INFORMATION 4 SP20B MODEL CODES 4 SP25 MODEL CODES 5 B DISASSEMBLY 6 C INSPECTION AND REPAIR 6 D REASSEMBLY 7 E ROTATION CHANGE 10 ROTATION CHANGE ILLUSTRATIONS 12 F TESTING 16 G TROUBLE SHOOTING 17 H EXPLODED VIEWS amp PARTS LISTINGS 18 SP20B BELT DRIVE INSTRUCTIONS 27 PRINCE SP SERIES HYDRAULIC GEAR PUMP INLET SIDE CAVITY MARK INDICATES FRONT OF BODY OPTIONAL REAR OUTLET SMALL PORT FOR CW ROTATION PRINCE 6 LOGO IS ON INLET SIDE BACKUP STRIP GOES TO INSIDE OF MOLDED SEAL ARROW ON MM BACKSIDE Q A ITEM DESCRIPTION BOLT 2 DOWEL PINS SIDE OUTLET SMALL PORT SNAP RING FRONT PLATE BACK PLATE BEARING CARRIER ASSY BODY SP20B SERIES DRIVE GEAR CLOCKWISE ROTATION SHOWN IDLER GEAR WASHER UPPER KEY NOT SHOWN WASHER LOWER SEAL BACK UP STRIP SP20B SERIES MODEL CODE EXAMPLE SHAFT SEAL STD SP20B XX X X H X X X BASIC SERIES NO SHAFT SEAL TYPE OMIT FOR STANDARD BUNA N H MEDIUM PRESSURE BUNA N DISPLACEMENT REV ROTATION L COUNTER CLOCKWISE R CLOCKWISE PORT LOCATION OPTION 11 DRIVE SHAFT FACING THE DRIVE A SIDE INLET AND OUTLET W PLASTIC PORT PLUGS 14 9 SAE 9T 16 32 SPLINE SHAFT END OF TH
11. pages for each pump series 18 19 H6V GOZdS SLYOd 3GIS NOILV LOH 090 00910009 60090S00S 610705005 690709009 601709009 60009009 60109009 8020004L 9095 FSIMMOO10 dWNd 80ZdS 90910009 800908009 870709009 81009009 890709009 801709008 800709009 80109009 s 802004L 06 90295 20905008 200909009 20709009 110705005 19009009 210109009 210009009 101605005 s 80Z000 ZVOZdS q3qn1ONI SN31I LIM WAS 0 dS MOWd 0217 10908008 900909009 970709009 910705005 990709009 901709009 90009009 90 09009 180200041 Z 80295 pursue ee pu Pbi 909108009 900908009 90709009 9 009009 99009009 SOLVOSO0S 90009009 90 09009 180200041 0 90295 9 10119009 090 009205005 700909009 70705005 71009009 790709009 701709009 70009009 70109009 p 990200041 9 80295 Su g 090 00910009 0090S00S v0v0S00S L070S00S 9009009 01709009 0009009 0109009 p 990200041 vl 80295 LAVHS Q3A3M 29109009 L 090 00905008 Z0090S00S 20709009 21009009 29009009 201709009 20009009 201809009 s 802000 LL 80zdS NEA a 090 00905005 100909009 170705008 11008005 15008005 10705005 10005005 LOL 0S00S 5 76 80200041 6 9095 LuvHO 33s L 6 0 109208008 000909009 070709009 010705005 090709009 001709009 00009009 00109009 802000 8 90295 p pode 090 00905008 010905005 71970900
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13. 3w Was L4vHs 05219009 L SL 7 015 qvas 1avHs 005215005 909108009 900908008 970509005 SL0S0S00S SS0S0S00S 901909008 900909009 900609009 180200041 0 9095 91015 01219008 e 090 009109009 r0090S00S 770809008 710908009 790809009 701908008 700908008 70008008 y 99000041 9L 90245 qwas 000219009 H3MOTDH3HSVAW IMVHO33S z 090 00908008 0090S00S 70909009 10909009 90908008 01909008 00909009 0009009 p 990200041 vl 90295 13VHS 0343A AIA 29109009 L 090 00908008 200909008 270909009 210909008 290909008 201909008 200909009 200809009 gz 180200021 LL 80295 1JVHS 8 9 09209009 L m I Gir 090 awd 33S z oL 090 00908009 100908008 170909009 LL0S0S00S LS0S0S00S 01505005 100505008 10009009 6 6 802000 6 9095 av39 J101 33S L 6 0ZL Loszosoos 000908008 00509008 010505005 050505006 0015058005 0005050058 000 05005 s 80200041 8 9095 33S 8 3 AdOS INMVHO33S 1 090 0090009 010908008 219909009 19909008 019908008 119909009 810609009 09 12000 9 80295 ASSY salvo 9 00209009 9 WALI G wau Sy Ova 006106006 S amo SudHsv UVES Y71701 1 01 ANO 3NI1dS 11 516 2 WALI SITO 3ZIS dnd 31V1d 000108008 L v ONIN dVNS 921 000 L 8 WALI 5 2
14. 5 oozeosoos Gy 18020004 61 VSZdS OL WALI SH3HSVM AYG G3A33 8 7 ANG 3NI1dS LEL WALI AdOS FL WILI 517109 3ZIS dnd 5 8 WALI L WALI 27 NOLLV LOS M29 GNVH 1331 SNOLLIGNOO WALOV SHL ONISN G3NIWH313G dais LA INI 38 GINOHS SONILVH WNLOV A INO 39N333333 33V SINIYA Q31VOIONI OLA SAZIS 3AV3HS GASN 1739 JO ATALS NO NIQN3d3d TIIM S3ILIOVdVO HOLOV4 ADIANAS SZ Y S3AV3HS YALAWNVIG HOLId 1799 A STALS Q3HOLON WNINAdd V ONISN SNOILVONANWOOSY SAYNLOVANNVW NO G3SV8 SONILVH 1138 ONINNNY NAHM NOISNAL ACIS LH9IL JHL 40 LN3OH3d 02 OL TWNOA NOISNAL Addis MOV1S V ANY S3AV3HS YALANVIG HOLId NO Q3SV8 QVOT LAVHS ALVWIXOUddV SILON 08 006 oz 004 SOL 009 ca0zds 08 0001 008 SOL 007 GL 00 0 90248 09 00 021 006 SOL 008 GL oss 1290248 1 OSL 0081 021 0001 SOL 006 GL 089 290245 T 08 0091 021 001 SOL 0001 91 008 029045 GNVH 1431 091 0061 0ZL 008 901 0081 GL 006 9L80zdS 90 90 1138 40 08 002 021 0091 SOL 0091 Gl O0LL vLg80ZdS G3GN3WWOO3H oS 0092 01 0002 SOL 0081 SL 008 ILLgOzdS d OSL 000 01 0082 SOL 000z GL 0091 690295 081 000 021 0092 SOL 00vz GL 002 890298 990245 avo1 ISa 87 avol avo1 18 97 sd dais LAVHS aunssaudaqis 1dyHS3unssSaud 3dis LJvHS JYNSSIYd LAYHS HH SSdHd NOLLV
15. 60001061 v P N 1108 luvHO 33S L j NOILdIHOS3Gd YSEWNN IHVd ALO WALI ASIMMOOTONSLNNOOD 1 LAVHS ONIOVS NOILV LOH HAVN 9v dels NOST ANITAS Z 9 LOL 3VS S Q3A3 15 v V gadis LIINI v 3NITdS 2 9l HLOOL 1 8 Q3A3M LHOIVYLS 8 6 3VS 3NI dS c 9L HLOOL 6 3VS 6 LAVHS 11O8 V 3VS H S1HOd QHVONVIS 6 HdAL LHOd 3GISx0vag NO 191100 9 131NI HV3 Q NOILV2O 1 LHOd 3009 LN3W3OV1dSIG TX H 6 Q XX 80cdS HLOOL dO 5 N3AINHQ NON NO 9 111110 1n933aNn ON aqls AdO1S MOTIVHS _ HLOOL 4V39 dO 3ilJOMd AGIs NOILVLOY 23 SWALI TVIS S dS HONd 090 009208009 02908008 0 r0S00S 202709009 20809009 9 890200041 9 8295 aYNSSJYd G3NW Was LAVHS 9092 9008 L OL 1S vas L4VHS 109219009 b 9 oszos00s 90290800 90 0 00 90Zr0S00S goeeosoos 9 890Z00041 29 YSZdS Was 090219009 c aS p p wis LS0Z1S009 227 22 0 90910008 90290800 80709009 902709009 9009009 S S 290200041 vv VS dS 8008 sek 702909009 0 09008 702705005 70 05005 6 902000 8 VSZdS H6V VvSzds S TII sore h s i 20508009 s s d ldVHS 8 2 A3 90908009 n 109208009 0z90S00S 60 05005 0Zr0S00S 009009 80200041 Ze YSZdS e
16. 9 170705008 11005008 1580705008 201709009 2100 09009 200809009 9 80200011 Z 80245 5 4191 WAS 0 dS MOWd n 0217 05 05005 90090S00S 970709009 910709008 990709009 9017090089 900709009 900809009 sy 180200011 Z 90295 3unssaud aw 1v3S LJvHs 0SZ1S00S L SL GIS Was EUS 00SZLS00S 02 90108008 9009090089 90709009 910709008 990709009 9017090089 900709008 900809009 S y 180200011 0 90295 15 9 101219009 gt 090 005 05005 r0090S00S 70705008 710709008 90709009 7017090089 00709008 00809009 y 990200041 91 80245 qwas 000219009 z 2 3 W6348SVAK sas z 090 009109009 0090S00S r0r0S00S L0r0S00S 90709008 017090089 00709009 00809008 y SS020004L rL 8095 LAVHS Q3A3M 29109009 L n 090 ooszosoos Z0090S00S 270709009 210709009 290709009 201709009 200709009 200809009 gz 802000 LL 90295 14 Q3A3M 8 9 709209009 L n 6009 S008 S008 50705008 S006 9008 S00S Gig dao 43330 SES VM 05006605 z 090 009409009 10090900 17070900 1 070900 19070900 10170900 10070900 000900 280200041 6 9095 Hv3oudid 33S L 6 0217 Loszosoos 00090S00S 0F0F0S00S 010709008 090709009 0017090089 000709009 00009009 gz 802000 8 8045 t 9 090 00SZ0S00S 0L090S00S 7187090089 5815705006 2197090089 19709009 810809009 05 2000 1 9 9095 Agog luvHO 33S L 2 ASSY
17. 9 5815705006 21909009 19709009 9108098009 09 000 9 80295 8009 1 ASSY Pe AYG 5 1 01 ANG AYGANIIdS LLL AHO3NIIdS 16 4 WALI AGO 61108 3215 31V1d LNO3J 010105005 L r ONIN dVNS 921 000 8 WALI uv39 SNId 21000106 v z 1708 LYVHO 33S v L NOILdIMOS3Q YAENINN ALO Wall 3SIMM201078 L4VHS JO SNIOV3 NOLLVLOM J3NITdS 2 9b LOL AVS S GQ3A33 15 ANINdS 2 9b HLOOL LL Q3A3M LHOIVYLS 8 6 3VS 140d 1311nO ANINdS 2E 9l HLOOL 6 3VS 6 l4VHS L108 V 3VS H ONILNNOW S1HOd 15 6 HdAL LYOd 3dISMova NO 131100 9 13TNI NOLLVOO T 1909 d A385 3000 LN3W3OV1TdSIq H 6 V XX 80ZdS N VA 3 V4YNS LNOYS 4Vv39 LNOYAGNN ON sais 3dO1S MOTIVHS HLOOL 3V39 JO JAIS 191100 131NI HLOOL dO C NO gals LIVNI 1n9oH3aNn daH NOILV LOY 20 090 00808009 60090S00S 6LOvOSO0S 6S0r0S00S 60Lv0S00S 600r0S00S 600 0S00S 80Z000 L 9095 lt SLHOd S00S S00S S00S 960709009 S006 S008 S008 Z MNV3H NOLLV LOM ISIMA2019 dWNd 9045 ovz 905108008 80090900 87070900 81070900 89070900 80170900 80070900 8000900 8000 1 06 90295 086 20109005 200908008
18. D ASSY 3SVO 010205005 025105005 L 31V1d LNOHJ 020109009 L ONIY dYNS 11 0002 D SNId 218000106 r 1108 lNVHO 33S 8 NOILdIH2S3G W3SWRN LYYd ALO ASIMMOOTOYNSLNNOO 1 L4VHS JO ONIOVS NOLLV LOMH a343 15 8 3VS 3NI dS 2 9L HLOOL 3VS L LAVHS 11O8 V 3VS H ONILNNOW S1HOd QHVONVIS 6 3dAL LYOd LAILNO L3 TINI HV33 G NOLLVOO T LYOd 3009 1N3W3Ov ldsla TX H 6 Q XX vScds LIINI 1 398V L3TNI 3GIS L3 INI jBaisxova __4 71 NHV39 H1OO1 40 Nf Adis LIINI ALIAVO LIINI I3INI 191100 ON adis ol AdO1S MOTNHS j HLOOL 3V39 dO 31140ud NOILVLOY 5 090 00909009 20909009 20909009 2102909009 10209009 9 89020004 9 VSZdS 9 097 05 05006 902905005 909090089 902505005 90209009 9 89020004 29 VSZdS Sh opz 90909009 90909009 909090089 902909009 90209009 S S 290200011 vv VSZdS ost 05 05005 r0Z90S00S 709090089 702505005 702605005 gg 902000 8 VSZdS 02 7 109109009 0z90S00S 0909009 02909009 0209009 g 802000 1 VS dS D ose 20909005 Z0Z90S00S 208909009 202909009 20209009 g 802000 1 ZZ VSZdS 090 005 05005 102909009 Loesosoos L0ZS0S00S 102608005 gv 802000 zz WSZdS 9 02 7 10909009 002905005 009090089 00250500
19. E PUMP 16 C BOTH SIDE amp REAR INLET AND OUTLET W STEEL PORT PLUGS 2 SAE 5 8 STRAIGHT KEYED D REAR INLET AND OUTLET W PLASTIC PORT PLUGS 3 11 TOOTH 16 32 SPLINE 2 E BOTH SIDE amp REAR INLET AND OUTLET W PLASTIC PORT PLUGS 4 3 4 STRAIGHT KEYED 39 PORT TYPE 5 SAE 10T 16 32 SPLINE 9 STANDARD SAE PER CHART MOUNTING 8 METRIC O RING PORTS H SAE A 2 BOLT 7 BSPP PORTS 6 SAE SPLIT FLANGE PORTS 5 METRIC SPLIT FLANGE PORTS A GENERAL INFORMATION Note SP20B pumps DO NOT have Wear Plates 1 When assembling and disassembling pumps the work area should be clean and dry There should be adequate space to lay out the parts in the manner in which they were disassembled or INLETSIDE lt CAVITY vy NLETSIDE s N lt 8 Y a NU PN 1 SN Z OPTIONAL REAR i OUTLET SMALL es PORT N NS N 14 i PD BACKUP STRIP GOES K TO INSIDE OF SEALS S 15 ITEM DESCRIPTION 6 ce J N 1 BOLT NON gt S 2 DOWEL PINS WA 2 3 SNAP RING BACKSIDE 4 FRONT PLATE 5 BACK PLATE x ES 6 BEARING CARRIER ASSY N 7 BODY OUTLET SMALL PORT 8 DRIVE GEAR 41 9 IDLER GEAR SS 10 WASHER INLETSIDE NOTCHES ON FRONT OF BODY 41 KEY NOT SHOWN 12 WEAR PLATE 13 BACK UP STRIP 14 SEAL 15 SEAL SP25A SERIES 16 SHAFT SEAL STD CLOCKWISE ROTATION SHOWN SP25 SERIES MODEL CODE EXAMPLE SP25A XX X 9 H X X X BASIC SERIES NO SHAFT SEAL TYPE OMIT FOR STANDARD BUNA N ci H MEDIUM PRESSURE BUNA N DISPLACE
20. H ONILNNOW S1HOd 15 6 3qdA1 LHOd 1911070 9 LIINI SV3 O NOLLVOO 1 1404 3000 1N3WN3OV1dSIG WX H 6 d XX vScds 394v LIINI Hvaio ON adis gt 3dO1S MOTWHS J 67 9 40 31140ud adis INYA L3 INI 191110 ALIAVO H LOOL dO 3GIS Adis LIINI N3AIHQ NON NO 1N9Y30NN 43H NOILV LOH 25 SWALI LA IV3S 0ZdS MOWd 3unss3ud q3N 14vHs 5805215005 a1s 1vas 14 5 105215006 gt qwas 0021005 qwas 19019009 T H6V VSz dS 1915 00121005 51 5 ALW1d uv3M 010018009 13 GAAS 8 2 A3 909108008 z v39 luvHO Jas YSLNNOD dNAd S dS o Sii e Agog LYWHO 33S ASSY 3SVO 010205005 31v1d ova 129108008 LNONS 020105005 dYNS 1110002 SNId 13MOG 20001061 1108 lNVHO 33S NOlLdlH2S3G ASIMMOOTONA LNNOO 1 13VHS JO ONIOVA NOILV LOY Q3A33 15 8 3VS 3NI dS 2 91 HLOOL L 3VS L LAVHS 1108 2 V 3VS H ONILNNOW S1HOd 15 6 3dAL LHOd LATLNO LAINI 3GIS V NOLLVOO LYOd 3309 L1N3W3OV1TdSIGd 1X H 6 V XX VS dS LIINI YSEWNN INVd ALO WALI AAS LIINI E 090 008405008 10909008 40 50S00S 202809009 200009 9 89000041 9 VSzZdS L 9 09 09 09009 90909008 90905009 902909009 900009 9 89000041
21. If you now are assembling a clockwise rotation pump the body will have the inlet side down If you are now assembling a counterclockwise rotation pump the body will have the inlet side up Keeping the body and gears in the orientation described above carefully align the bearing gear assembly and insert it into the body You may have to adjust the wear plates SP25 only slightly as they enter the body At this point confirm that the inlet cavities of the bearing are next to the inlet side of the body and that the drive end of the drive shaft and the front surface of the body are both on the left end Confirm that the arrow on the cover indicates the correct rotation for the new opposite rotation front cover Insert the square cut seal 1 piece on the SP20B and 2 piece on the SP25 first and then the white backup strip into the new front cover The groove on the SP20B seal goes to the bottom of the seal groove and the white backup strip goes to the inside of the square cut seals Also install the rear cover seals if they have been removed Make sure that the seals and strips are fully seated for their entire length Insure that the shaft seal and snap ring are also installed in the front cover Rotate the rear cover about the axis centerline of the pump the inlet side side with the largest rear port boss will have gone to the opposite side of the pump and should be on the same side as the wide inlet groove on the inlet side of the body Insert dow
22. LOM WO QNVH 1HOTH XONddV XOtddv XVNW ONILVY XVIN dH 6 ONILVY XVIN dH tL ONILVY dH 9 ONILVY XV dH 6 2 0941 Wd 0098 092 009 et 131NI si1a8 YZ s1139 113881 188 d lt S1 138 40 SSNILVH H3MOd3SHOH GSACGNANWOOSY ONIO339OX3 LNOHLIM 38 ST AVN LVH L SAYO7 LAVHS ONILINSSY SIYNSSIYd 318vMOTITV 9NIMOHS 318V L S MAN v ATIVOIdAL 318lSSOd MN NS SI SV 39V4 ONILNNOW OL 35010 NCC e SVv38hOHS AdTInd JO YILNIO p 7 ua dnd 1 TInd 1138 9 OL wy ATIVOIdAL WOILOWYd SI SV 39s V1 SV 38 GINOHS A3TIfhd dO H313IAVIG HOLId T GCF 92 ATLVANS 38 AVI SSYNSS3AYd 9NILVH3dO LINSNVYL 517199 LVHL H3MOd3SSHOH dO LNNOWY SHL NO SNOILVLINIT OL ANG Q3 LON 38 GINOHS LI OL OL dWNd ASNVD AYN ONINSLHOIL WHJAO SNINOISN3L 1199 SHL NI ONILNNOW SHL dO NOLLV EN3ISHO SHL NI Q3S SI 1138 38 dNNd AHL GASN 38 LONNVO SGOHL3IN ASAHL dl SGOHLAW TWOIdAL SANIdS GIOIN HO SONITdNOD 393ld 338HL YSHLIA SAIC TVIXV NV HLIM SI V 9NIAIPHG dO GOHLAW Q32H8322d AHL SdWNd Salsas 90 5 SNOILONYLSNI 1199 28
23. MENT REV ROTATION 19 L COUNTER CLOCKWISE 27 PORT LOCATION OPTION RECCOCKWISE 32 ASIDE INLET AND OUTLET SPART FACING THE DRIVE 38 1 SAE 13T 16 32 SPLINE SHAFT END OF THE PUMP 34 B SIDE INLET SIDE AND REAR OUTLET SAE 8757874 STRAIGHEREVED 52 SIDE amp REAR INLET AND OUTLET W STEEL PORT PLUGS D REAR INLET AND OUTLET E BOTH SIDE amp REAR INLET AND OUTLET W PLASTIC PORT PLUGS PORT TYPE MOUNTING 9 STANDARD PORTS SIDE PORTS A REAR PORTS D BOTH SIDE amp REAR PORTS C H SAE A 2 BOLT 8 STANDARD PORTS SIDE INLET SIDE amp REAR OUTLET B in which they will be assembled Clean tools and equipment should be used Any dirt or grit that gets into the pump can cause significant damage to the pump and cause failure 2 Before disassembly of any pump the outside of the pump should be cleaned thoroughly with a good grade solvent then dried 3 Before the assembly of any parts they should be inspected for cleanliness and cleaned if required 4 A vice with soft jaw inserts or a holding fixture will be necessary to retain the front flange during assembly and disassembly If a vice is used extreme caution must be exercised to avoid over tightening the jaws and distorting the part 5 Asoft blow mallet one with plastic or rubber heads may be used to aide in disassembly Do not use metal hammers B DISASSEMBLY Note Maintaining the proper orientation of parts is extremely important In order to keep
24. NTATION SP25 SERIES 4 Lay the body on the table with the front surface to the left The front surface is identified by a drill point mark on the surface for the SP20B bodies and by the milled notches on the side of the body for the SP25 bodies If you are assembling a clockwise rotation pump lay the body down with the inlet side down The inlet side can be identified by the wider and deeper grove that runs lengthwise on the inside of the body If you are assembling a counterclockwise rotation pump lay the body down with the inlet side up 5 Keeping the body and gears in the orientation described above carefully align the bearing gear assembly and insert it into the body You may have to adjust the wear plates SP25 only slightly as they enter the body At this point confirm that the inlet cavities of the bearing carriers are next to the inlet side of the body and that the drive end of the drive shaft and the front surface of the body are on the same end 6 Insert the square cut seals 1 piece on the SP20B and 2 piece on the SP25 first and then the backup strips into the front and rear covers The groove on the SP20B seal goes to the bottom of the seal groove and the white backup strip goes to the inside of the square cut seals Insure that the seals and strips are fully seated in the seal groove for their entire length 7 Confirm that the arrow on the front cover indicates the correct rotation and then secure the front cover in a holding
25. OL LSNW 31V1d LNOYS NOLLVLOY 3SIAM20 19 43Od 399v LIINI 3AIS GNVH 1H9I V SI SIHL LIINI 1HOd 995 I3INI INNOLLdO 401 NO 10901 3ONIzId NOLLV LOH ALIAVO 3GIS L3 INI LYOd TIWWS 131100 AIS 3GIS LIINI WOLLO NO SI 0901 3ONIHd NOLLV LOH MO 1 S31VOIGNI 39O18 SNIHV38 Was 3qISNI S309 dnXova LYOd TIVINS 1311nO YYY TVNOILdO a NOILVLOY ASIMMOOTOYSLNNOO 1431 V OL SIHL LH3ANOO OL LSNW YY39 NOILV LOY SSIMM9O19 GNVH LH9IY V SI SIHL NOILVYNSISANOO GNVH ALIAVO ACIS LAIN 13 MO QNVH LH9IH OL MOD GNVH 1331 NOISH3ANOO NOILV LOM 80ZdS NOILVYNSISANOO LH9I NOILVLOY 3SIMNMOO 10 GNVH V OL dWNd SIHL LYSANOO OL Gdaovidaus LSNW ANY 31Vd LNOYS NOILV LOS ASIMMOOTONSLNNOD GNVH 1331 V SI SIHL 180d TYAS LAILNO JAIS WOLLO4 NO SI 0901 JONl d NOLLV LOH MO S31VOIdNI MEV 1 rivis 1371110 TVNOLLdO 3 0089 3GIS LIINI gt ALIAVO 3GIS 131NI 3dis MOVE NO 39uv LIINI 3dIS L3 TINI 30018 9NINV3ga Was 40 ACISNI S3OS 1 NOLLV LOY 3SIMM20
26. ROTATION CHANGE If the direction of rotation is to be changed the following instructions should be followed Use the exploded rotation change views showing the correct before and after rotation change views of the pump for reference If the pump is to be reassembled with the same rotation direction or for additional information go to the Reassembly instructions Section D 1 Lay out the gears bearing carriers and wear plates SP25 only orientated in the manner in which they came out of the pump Drive end to the left drive gear farther away from you than the idler gear If the bearing carriers and wear plate SP25 only are still on the shafts slide them off 2 Replace the drive gear with the new drive gear of the opposite rotation again keeping the drive end to the left If the new shaft is a keyed shaft remove the key and place tape over the keyway The Gear Tooth Orientation Example may be used to confirm the correct rotation drive gear is being used 3 Rotate the idler gear end for end The front end end that pump is driven from of the idler shaft should have been marked during disassembly This marked end will now go towards the rear of the pump 4 Slide the gears back together Note When assembling the gears into the bearing carrier it is extremely important to maintain the correct orientation of the bearing carriers and in the case of SP25 pumps the wear plates Refer to the Bearing Carrier and Wear Plate SP25 only O
27. SERVICE MANUAL SP20B AND SP25A HYDRAULIC PUMPS rince HYDRAULICS SAFETY PRECAUTIONS 1 All hydraulic pumps must be properly assembled and installed in the hydraulic system to prevent personal injury and or property damage Further the improper servicing of a pump may result in personal injury and or property damage Read and understand all catalog and service information before starting As with all mechanical work the proper tools knowledge and safety equipment are required Always wear safety glasses 2 Make sure all pressure has been relieved in the hydraulic lines before removing installing or servicing a hydraulic pump WARNING Hydraulic fluid escaping under pressure can have sufficient force to penetrate skin causing serious personal injury Do not use your hand to check for hydraulic leaks 3 Before installing or servicing a hydraulic component make sure all weight has been removed from the cylinders or motors before disconnecting hydraulic lines WARNING Disconnecting the hydraulic lines while the cylinder or motor is under load may result in the unexpected rapid movement of a machine resulting in serious personal injury 4 Do not exceed the operating specifications including those for pressure speed and temperature All hydraulic systems require a means to limit the maximum pressure This requires either a pressure relief valve in the system or a pump that has pressure compensation WARNING Pressure
28. a consistent reference lay out the parts in the same manner as shown in the exploded drawings with the drive shaft end of the pump to the left and the drive shaft above furthest away from you the idler shaft 1 2 3 10 C Prior to disassembly scribe a match line between the front cover and the body and between the body and the back cover Ifthe pump has a keyed shaft remove the key and place tape over the keyway Secure the front cover in a holding fixture or clamp lightly in a vice with the shaft pointing down Remove the bolts and washers holding the pump together Remove the rear cover by pulling upward in an axial direction The cover can be tapped lightly with a soft blow hammer to aide in removal Lift the body and gear bearing assembly including the body drive gear idler gear two wear plates SP25 only and two bearing carriers out of the front cover Lay the assembly down with the drive end of the drive shaft to the left and the drive shaft farther away from you than the idler shaft Slide the gear bearing assembly out of the body and lay the assembly down again keeping the drive end of the drive shaft to the left and the drive shaft farther away from you than the idler shaft Some initial resistance may be felt when removing the assembly from the body Mark the ends of the drive shaft and the idler shaft on the end that the pump is driven from Note that the bearing carriers have an inlet cavity that is on the inl
29. able may be used as a brief trouble shooting guide for the pumps Condition Probable Cause Possible Corrective Actions Low or no oil Low oil level in reservoir Add oil to correct level flow from the Restriction in the inlet line Correct or clean out restriction pump Pump fails to prime Insure there is no pressure at the outlet during initial startup Insure oil is getting to the inlet port Raise reservoir Bine damaged 3 Scored wear Replace wear plates SP25 ONLY SEE or damaged s carrier Replace bearing carrier O eed body Pump is driven via a belt and pull is in Correct the direction of belt pull or the the wrong direction or belt is over belt tension tightened Pump will not Warped damaged or scored wear Replace wear plates SP25 ONLY develop full plates SP25 ONLY pressure Rough or damaged bearing carrier Replace bearing carrier exterior General scoring on body bores gear Oil is contaminated Clean system and shaft journals or wear plates SP25 replace filter or provide proper filter only or roughening of the gear track in Replace pump area in the bores of the body Pump has been run at excessive Replace pump pressures causing bearing and journal failure and or excessive gear track in depth System relief valve misadjusted Readjust relief valve 17 Probable Cause Possible Corrective Actions Air in the oil Check inlet lines for being air tight Check shaft seal Check for restrictions in inlet lin
30. correct ports on the pump Before the inlet fitting is fully tightened the inlet shutoff should be opened When oil begins to leak from the loose inlet fitting it should be fully tightened Confirm that any valves in either the inlet line or outlet line are open Set the pump test stand to rotate in the proper direction Accelerate the test stand to 1180 rpm or 1780 rpm at zero minimum pressure Check the flow meter to confirm that the there is oil flow If there is no flow after a few seconds stop the test stand The inlet line fitting should be loosened slightly to check to see if the pump is getting oil If it is begin the test again If there is still no oil flow stop the test remove the pump and disassemble it to check for problems Prolonged running with out oil will damage pump 7 After noting that there is flow run the pump for approximately 30 seconds at minimum pressure 8 Cycle the pressure from minimum to approximately 1000 psi three times holding it on pressure for about two seconds during each cycle 9 Cycle the pressure from minimum to approximately 2000 psi three times holding it on pressure for about two seconds during each cycle 10 Cycle the pressure from minimum to approximately 2500 psi three times holding it on pressure for about two seconds during each cycle 11 Bring the pressure back up to 2500 psi and run the pump at that pressure for one minute Note the flow produced by the pump and confirm that the pu
31. e gears bind correct by correcting the orientation of the idler gear by removing the idler gear rotating it end for end and inserting the opposite end back into the bearing carrier or by using the correct rotation drive gear Again check to see if the gears rotate without binding If the ends of the gears were marked during disassembly and the rotation direction of the pump is not being changed the front end drive end of both gears should also have a mark on them After confirming that the gears rotate without binding slide the second wear plate SP25 only over the journal bronze side towards the gear and then the second bearing carrier over the journal Make sure that the orientation of the inlet cavity and the large radius for the SP25 wear plate is correct Lay the bearing carrier gear assembly down again with the drive end of the drive shaft to the left and the drive shaft farthest away from you BEARING CARRIER AND WEAR PLATE ORIENTATION SP20B COUNTERCLOCKWISE ROTATION INLET CAVITIES UP SP20B CLOCKWISE lt ROTATION INLET CAVITIES DOWN SP20B COUNTERCLOCKWISE ORIENTATAION SP20B CLOCKWISE ORIENTATAION SP 25 COUNTERCLOCKWISE ROTATION INLET CAVITIES AND LARGE RADIUS ON WEAR BRONZE SIDE PLATE UP TOWARD GEAR 2 BRONZE SIDE TOWARD GEAR SP 25 CLOCKWISE ROTATION INLET CAVITIES AND LARGE RADIUS ON WEAR PLATE DOWN SP25 COUNTERCLOCKWISE ORIENTATION SP25 CLOCKWISE ORIE
32. el pins into the body and assemble the rear cover onto the body The match line that was scribed between the rear cover and body during disassembly should again be inline Secure the front cover in a holding fixture or clamp lightly in a vice with the shaft seal side down Insert the dowel pins into the front cover and assemble the partially assembled parts onto the front cover Confirm that the IN on flange ear of the front cover is also on the inlet side of the body Insert the bolts through the washers and into the body Lightly tighten the bolts lubricated threads and then torque them in a crisscross pattern to 24FT LB 2 FT LB If the pump has a keyed shaft remove the tape over the keyway and insert the key With the pump assembled correctly there is normally some resistance to turning the shaft however with the assistance of a wrench the shaft should turn smoothly If there is binding the pump should be disassembled and checked to see if the components have been assembled in the correct orientation if there is any foreign matter in the pump or if the seals are out of place Before being put into service the pump needs to be tested to confirm performance The test procedures are described in the TESTING section 11 12 M22 GNVH L331 OL MO GNVH LH9IH NOISH3ANOO NOILV LOMH 80ZdS NOILVYNSISANOO 1331 SIS LIINI NOLLV LOY ASIMYOOTOYALNNOO 1431 V OL SIHL LH3ANOO
33. es Raise reservoir Pump is noisy Excessive inlet vacuum Cavitation Increase inlet line size or remove restrictions in inlet line Use a lower or proper viscosity oil Reduce rpm If a suction strainer is used clean or use a larger one Raise reservoir Air in oil Check inlet lines for being air tight Check shaft seal Check for restrictions in inlet lines Increase reservoir size Raise reservoir Shaft seal leaks Shaft seal is worn or was cut by the Replace shaft seal shaft during assembly Fluid incompatible with seal Use compatible fluids Casting porosity in front cover seal Replace front cover bore Pump is driven via a belt and pull is in Correct the direction of belt pull or the the wrong direction or belt is over belt tension See Section SP20B Belt tightened Drive Instructions Pump drive not aligned or eccentric Align the pump drive Pump leaks oil Pump seals have become brittle due to Replace seals Correct heat problem between heat sections Mating surfaces have become rough Repair any surface irregularities or overheats wear or scoring Improper system design or cooling Correct design or improve cooling Too small a reservoir Use larger reservoir H EXPLODED VIEWS AND PARTS LISTS The following section contains exploded views and parts lists of the SP20B and SP25 series pumps Separate pages are shown for each combination of side rear ports and clockwise counterclockwise rotations for a total of four
34. et side of the pump and that goes towards the gear Also note that the SP25 wear plates have a wider notched area on the side that goes next to the inlet cavity See the Bearing Carrier and Wear Plate SP25 Orientation drawings in the reassembly section Once the correct orientation is observed slide the bearing carriers and wear plates SP25 only off the gear journals and lay them down in the same orientation as they originally had on the gears The square cut seals and the white backup strip may be removed from the front and rear covers for inspection Generally the shaft seal needs to be replaced if it is removed If the shaft seal is to be replaced remove the snap ring and then the shaft seal from the front cover Care must be used to not damage or scratch the seal bore during seal removal INSPECTION AND REPAIR After parts have been cleaned they should be checked for changes in color any pitting or scoring or any debris Individual parts may be checked according to the following instructions If any of the parts are damaged replace them 1 Pump Body I The pump is designed so that when the pump is initially broke in the tips of the gear teeth create a tracked in area in the body that is the width of the gears and extends from the inlet port area to about one third of the way around each LARGE GROOVE bore any signs of tooth contact beyond the one t third point on the bores should be faint and not have any
35. fixture or clamp lightly in a vice with the shaft seal side down Insert two dowel pins into the dowel pin holes 8 Assemble the body gear assembly onto the front cover and dowel pins Confirm that the IN on flange ear of the front cover is also on the inlet side of the body 9 Puttwo dowel pins into the dowel pin holes on the rear surface of the body 10 Identify the inlet side of the rear cover the side with the largest rear port boss and position the rear cover on the body so that the inlet side of the body wide groove side and the inlet side of the rear cover are on the same side 11 Insert the bolts through the washers and into the body Lightly tighten the bolts lubricated threads and then torque them in a crisscross pattern to 24 FT LB 2 FT LB 12 If the pump has a keyed shaft remove the tape over the keyway and insert the key 13 Pour approximately 1 2 oz of clean hydraulic fluid into the pump 14 With the pump assembled correctly there is normally some resistance to turning the shaft however with the assistance of a wrench the shaft should turn smoothly If there is binding the pump should be disassembled and checked to see if the components have been assembled in the correct orientation if there is any foreign matter in the pump or if the seals are out of place 15 Before being put into service the pump needs to be tested to confirm performance The test procedures are described in the TESTING section E
36. he plate will show blue areas the plates should be replaced Any evidence of heat buildup usually means the pump has been run without oil 4 Bearing carriers The bearing carriers hold the teflon lined bearings An oil drain groove has been machined through the teflon layer through the bronze layer and into the steel layer at the top of the upper bearing and the bottom of the lower bearing This should not be misinterpreted as wear During normal operation some of the grayish teflon layer will be eroded toward the inlet side of the bearing This should not be considered excessive until about 80 of the bronze layer shows through the gray layer on about 1 3 of the bearing perimeter The wear is also excessive if there is scoring on the gear shaft or if the bearing has rotated or if there are any signs of heat buildup If there are signs of excessive wear the bearing carriers should be replaced 5 Mating Surfaces of the Front Cover Rear Cover and Body Some discoloration of mating surfaces is normal If there is damage that would prevent a tight fit during reassembly the problems should be corrected or the parts replaced 6 Square Cut Seals and Backup Strip The seals and backup strips should have square edges and be pliable If they are deformed or are hard or show signs of being hot they should be replaced REASSEMBLY ROTATION CHANGE Ifthe pump is to be reassembled with the same rotation configuration the following instructions should be used
37. idler gear is turned by the drive gear through contact on the drive side profile of the tooth shallow slope side with no undercut Like profiles are touching and the gears rotate freely when assembled in the bearing carrier Rotating in the correct rotation the teeth come out of mesh on the inlet side of the pump 3 Assemble the gear bearing carrier assembly The pump gears have non symmetrical teeth with different profiles on each side of the tooth The correct rotation orientation can bee seen in the illustration below When assembling the gears into the bearing carrier it is extremely important to maintain the correct orientation of the bearing carriers and in the case of SP25 pumps the wear plates In the Bearing Carrier and Wear Plate SP25 only Orientation view note the proper rotation and then use the position of the inlet cavities as a key reference For SP25 pumps also use the position of the large radius section as a key reference Orient the gears with the drive end of the drive shaft to the left and the drive shaft farther away from you than the idler shaft Bring the gears together and slide a wear plate SP25 only keeping the bronze side towards the gear and then a bearing carrier over the journals on the rear right side Use the illustrations to confirm the correct orientation of the inlet cavity and wear plate SP25 only At this point the gears should rotate in the bearing carrier without the teeth binding If th
38. mp flow meets or exceeds the minimum flow for the specific pump size as is indicated below The flow at either 1180 or 1780 rpm may be used as a reference Note As an allowance for disassembly and reassembly the minimum flows have been reduced slightly from factory standards If the pump flow does not exceed the minimum go through steps 7 through 11 an additional time If the flow still does not exceed the minimum remove the pump from the stand and disassemble to check for problems 12 If the flow exceeds the minimum inspect the exterior of the pump for leaks remove the inlet and outlet lines and plug the ports with shipping plugs Remove the pump from the test stand and check the shaft seal for any signs of leakage Any signs of leakage should be corrected 13 After test the tester s identification needs to be stamped above the pump ID stamp If the configuration of the pump has been changed the former model number on the ID stamp needs to be stamped X d out MINIMUM TEST FLOW DATA FOR SP20B SERIES PUMPS PUMP SIZE DISPLACEMENT MINIMUM FLOW MINIMUM FLOW x CORE opu GEM trs Ren GEM 16 MINIMUM TEST FLOW DATA FOR SP25 SERIES PUMPS PUMP SIZE DISPLACEMENT MINIMUM FLOW MINIMUM FLOW IN REV rS iE GPM i s RPM GPM 8 25 19 1141 673 SP25A22 349 SP25A27 1 660 10 39 The reference base for the test data is SAE 10 wt oil at 110 F G TROUBLE SHOOTING The following t
39. rientation drawings in the Reassembly section for details Note the proper rotation and then use the position of the inlet cavities as a key reference For SP25 pumps also use the position of the large radius section as a key reference 5 Rotate the rear bearing carrier and wear plate SP25 only so that the bearing that went over the drive shaft will now go over the idler shaft Insure that the inlet cavity still goes toward the gear and that the bronze side of the wear plate SP25 only still goes toward the gear Slide the bearing carrier and wear plate SP25 only back onto the shafts On the SP25 series make sure that the larger notched side of the wear plate is next to the inlet cavity of the bearing carrier Do the same for the front bearing carrier and wear plate If the correct gears are in place and correctly orientated the gears will rotate relatively freely within the bearing carriers 6 Rotate the body about the pump axis centerline making sure that the front surface of the body remains toward the front left side of the pump The front surface is identified by a drill point mark on the surface for the SP20B bodies and by the milled notches on the side of the body for the SP25 bodies The inlet side side with the wide lengthwise groove on the inside will go from 10 10 11 12 Pour approximately 1 2 oz of clean hydraulic fluid into the pump 14 15 top to bottom or from bottom to top depending on rotation
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