TECHNICAL SERVICE MANUAL
Contents
1. Failure to follow above listed precautionary measures may result in serious injury or death2. 23 Head and Idler Pin Assembly Ball Bearing 15 Bracket Gasket 24 Capscrew for Head Bearing Spacer Collar Inner 16 Pipe Plug 25 Relief Valve Gasket Ring Half Round Not H HL Casing Tapped or Flanged 26 Internal Relief Valve Bearing Housing 18 Rotor and Shaft Assembly Capscrew for Valve FIGURE 4 EXPLODED VIEW SERIE 4124A MODEL REPAIR MODELS H HL K KK L LQ AND LL PACKED PUMPS NAME Of PART ITEM NAME Of PART ITEM NAME Of PART Packing Gland Capscrew 23 Idler and Bushing Assembly Locknut Lockwasher End Cap 7 cetera BustngAesonby CapsuowiorHeas Braise a Plane Gasket iY raerce O S oma Ret vane SY EN Ea Ei Lip Seal Bearing Spacer Collar Outer Ball Bearing N Bearing Spacer Collar Inner Ring Half Round Not H HL Bearing Housing Pipe Plug Capscrew for Valve FIGURE 7 EXPLODED VIEW SERIE 124A MODEL Packing Gland Packing Gland Nut ITEM EH e Ea Em Ea e EA e EH EJ a DISASSEMBLY DANGER Before opening any Sentinel pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriateopeningsorconnections That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot be started while work is being done on pump the T
3. SENTINEL TECHNICAL SERVICE MANUAL UNIVERSAL SEAL HEAVY DUTY PUMPS SERIES 124A 4124A CAST IRON SIZES H HL K KK L LQ LL CONTENTS PACKED MECH SEAL lni Mechanical Seal Pumps PACKED A Universal Seal Pump R H124A H4124A Cartridge Type Optional Stuffing Box Seal Units are designated by the Packed Pumps HL124A HL4124A unmounted pump model Thrust Bearing Adjustment K4124A numbers followed by a letter Installation of Carbon Graphite Bushings K124A KK4124A indicating drive style Pressure Relief Valve Instructions L4124A KK124A LQ4124A INTRODUCTION ae L124A The illustrations used in this manual are for identification purposes only and cannot be used for ordering parts Obtain a parts list from the factory or a Sentinel representative Always give a complete name of part part number and material with the model number and serial number of pump when ordering repair parts The unmounted pump or pump unit model number and serial number are on the nameplate LQ124A LL124A FIGURE 2 SIZES K KK AND L FIGURE 3 SIZES LQ AND LL REPAIR MODELS H HL K KK L LQ AND LL CARTRIDGE MECHANICAL SEAL PUMPS D ai Rol Bo NAME Of PART ITEM NAME Of PART ITEM NAME Of PART 10 Cartridge Seal 19 Idler and Bushing Assembly n Capscrew for Bracket 20 Idler Bushing 12 Grease Fitting 21 Head Gasket 13 Bracket and Bushing Assembly 22 Idler Pin Bearing Spacer Collar Outer 14 Bracket Bushing
4. all bushing with groove at 6 00 o clock position in bracket If carbon graphite Refer to Installation of Carbon graphite Bushings page 11 Make sure slots in the face of the bushing are towards rotor end of the bracket Clean rotor shaft and seal housing bore Make sure they are free of dirt grit and scratches Gently radius leading edge of shaft diameter over which seal is to be placed Never touch mechanical seal faces with anything except clean hands or clean cloth Minute particles can scratch the seal faces and cause leakage ne cee 3 11 12 13 Place tapered installation sleeve on the shaft Coat tapered sleeve and inside of the rotary member with a generous quantity of light oil Grease is not recommended Start rotary member on shaft and over tapered sleeve Refer to figure 11 TAPERED INSTALLATION SLEEVE il i ull a IW Fl 0 L MECHANICAL SEAL ROTARY MEMBER i Mi mi SHAfT FIGURE 11 Move rotary member all the way on the rotor shaft until it is against the rotor hub If the seal uses setscrews to secure the seal to the shaft tighten the setsecrews once the seal is in place Some PTFE seals are equipped with holding clips which compress the seal springs Remove holding clips to release springs after seal is installed on shaft Lubricate outer diameter of seal seat gasket with oil Press seal seat into bore until back unlapped face bottoms in bore Make sure the seat anti rotation pi
5. ck off additional length on outside diameter and check again TURN BRG HOUSING C C W LENGTH ON O D ADDITIONAL LENGTH ON O D BRG HOUSING FOR 001 END CL STANDARD END CLEARANCE Inch TABLE 1 High viscosity liquids required additional end clearances The amount of extra end clearance depends on the viscosity of the liquid pumped For specific recommendations consult the factory Each additional Ya turn on the outside diameter of the bearing housing is equivalent to an extra end clearance of 001 INSTALLATION OF CARBON GRAPHITE BUSHINGS When installing carbon graphite bushings extreme care must be taken to prevent breaking Carbon graphite is a brittle material and easily cracked If cracked the bushing will quickly disintegrate Using a lubricant and adding a chamfer on the bushing and the mating part will help in installation The additional precautions listed below must be followed for proper installation 1 2 3 4 Apress must be used for installation Be certain bushing is started straight Do not stop pressing operation until bushing is in proper position Starting and stopping will result in a cracked bushing Check bushing for cracks after installation Carbon graphite bushings with extra interference fits are frequently furnished for high temperature operation These bushings must be installed by a shrink fit 1 2 3 Heat bracket for idler to 750 F Install cool bus
6. hat you know what liquid pump has been handling and the precautions necessary to safely handle the liquid Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood failure to follow above listed precautionary measures may result in serious injury or death 1 Mark head and casing before disassembly to insure proper reassembly The idler pin which is offset in pump head must be positioned toward and equal distance between port connections to allow for proper flow of liquid through the pump Remove head from pump Do not allow idler to fall from idler pin Tilt top of head back when removing to prevent this Avoid damaging head gasket If pump is furnished with pressure relief valve it need not be removed from head or disassembled at this point Refer to Pressure Relief Valve Instructions page 11 If pump has jacketed head plate it will separate from head when it is removed The gasket between head and jacket head plate must be totally removed Use new gasket when assembling pump Remove idler and bushing assembly Insert length of hardwood or brass through port opening between rotor teeth to keep shaft from turning Bend up tang of lockwasher and with a spanner wrench remove locknut and lockwasher from shaft 4 Loosen two setscrews in the face of the bearing housing and remove the bearing housing assembly from the bracket Refer to figure 10 5 Remove pair of half round ri
7. hing with a press If facilities are not available to reach 750 F temperature it is possible to install with 450 F temperature however the lower the temperature the greater the possibility of cracking the bushing Consult factory with specific questions on high temperature applications PRESSURE RELIEF VALVE INSTRUCTIONS IKE FZZZIEL 7 Pa aa UNS j REE VALVE LIST Of PARTS Valve Cap Valve Body Adjusting Screw Lock Nut Valve Spring Poppet Cap Gasket Spring Guide Bonnet Z ZZZZZZ Dac LAZIZ wad aN ANS S ANPU Op 0000 IN gt ee Valve Cap Valve Body Adjusting Screw Lock Nut Spring Guide Valve Spring Poppet Cap Gasket Bonnet Bonnet Gasket FIGURE 13 SIZES K KK L LQ AND LL DISASSEMBLY DANGER Before opening any Sentinel pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriateopeningsorconnections That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot be started while work is being done on pump the That you know what liquid pump has been handling and the precautions necessary to safely handle the liquid Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood
8. ngs under the inner spacer collar from the shaft There are no half round rings on the H and HL size pumps 6 Carefully remove rotor and shaft to avoid damaging bracket bushing BALL BEARING BEARING HOUSING 11 SETSCREW SPACER COLLAR SHAFT An bos yee LIPSEAL ee END CAP SETSCREW HALF ROUND an FIGURE 10 Loosen two radial setscrews in flange of bearing housing and with a spanner wrench remove the outer end cap with closure and outer bearing spacer collar Remove the double row ball bearing closure and inner bearing spacer collar from the bearing housing Remove the rotary member of the mechanical seal from the rotor shaft Remove the seal seat from the bracket Clean all parts thoroughly and examine for wear and damage Check lip seals ball bearing bushings and idler pin and replace if necessary Check all other parts for nicks burrs excessive wear and replace if necessary Wash bearings in clean solvent Blow out bearings with compressed air Do not allow bearings to spin turn them slowly by hand Spinning bearings will damage race and balls Make sure bearings are clean then lubricate with light oil and check for roughness Roughness can be determined by turning outer race by hand Casing can be checked for wear or damage while mounted on bracket ASSEMBLY 1 Install bracket bushing If bracket bushing has a lubrication groove inst
9. ns are aligned with slots in the bracket bushing Coat rotor shaft and face of mechanical seal with light oil Start end of shaft in bracket bushing turning from right to left slowly pushing rotor in casing Coat idler pin with light oil and place idler and bushing on idler pin in head If replacing with carbon graphite bushing Refer to installation of Carbon graphite Bushings page 11 Using a 010 to 015 inch head gasket install head and idler assembly on pump Pump head and casing were marked before disassembly to insure proper reassembly If not be sure idler pin which is offset in pump head is positioned toward the equal distance between port connections to allow for proper flow of liquid through pump If pump is equipped with jacketed headplate install at this time along with new gasket Tighten head capscrews evenly Slide inner spacer collar over shaft with recessed end facing rotor H and HL size bearing spacer collars are not recessed Place pair of half round rings on shaft and slide inner bearing spacer collar over half round rings to lock them in place There is no pair of half round rings on the H and HL size pumps Install the lip seal lip toward end of shaft in the bearing housing and turn the bearing housing into the bracket Pack the ball bearing with grease place on the shaft and push or drive into place in housing Install the lipseal with lip toward end of shaft and bearing spacer collar in
10. the outer end cap and turn the Po 14 end cap into the bearing housing until tight against the bearing Lock in place with two set screws in the flange of the bearing housing Put lockwasher and locknut on shaft Insert length of hardwood or brass through port opening between rotor teeth to keep shaft from turning Tighten locknut to 50 70 ft lbs Torque H HL or 100 130 ft lbs Torque K KK L LQ LL Bend one tang of lockwasher into slot of locknut If tang does not line up with slot tighten locknut until it does Failure to tighten locknut or engage lockwasher tang could result in early bearing failure and cause damage to pump Remove length of hardwood or brass from port opening THRUST BEARING ADJUSTMENT SIZE H HL K KK L LQ LL PUMPS 1 Loosen the two set screws in the outer face of the bearing housing and turn this thrust bearing assembly clockwise until it can no longer be turned by hand Back off counter clockwise until the rotor shaft can be turned by hand with a slight noticeable drag For standard end clearance back off the thrust bearing assembly the required length measured on the outside diameter of the bearing housing See Table 1 Tighten the two self locking type Allen set screws in the outboard face of the bearing housing with equal force against the bracket Your pump is now set with standard end clearances and locked NOTE Be sure the shaft can rotate freely If not ba
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