SERVICE MANUAL - Hydraulics International
Contents
1. Back up ring ie Back up ring 109x114 2x1 4 109x114 2x1 4 Bushing oO Ring 71x3 Back up ring 71x76 2x1 4 Piston SN tis E s PANNON Biehl ie Fig 7 10 Assemble together the lubricated piston and bushing Mount assembly in brake housing using a hand power press with guaranteed rectilinear movement Disk Spring Adjustment Washer Flange IZZ ri a NN wa i Fig 8 11 Install adjustment washer and disk springs see Fig 8 IMPORTANT The size of adjustment washer should ensure opening pressure as shown in Table 1 after mounting of flange the dimension over disk springs should be 9 0 1 mm see Fig 8 12 On rear part of shaft stave the inner bearing race of the rear bearing incl the roller retaining ring Outer rim is staved in flange 13 Lubricate and install O ring 114 2x1 78 in the housing seal groove B Service Manual Reassembly 14 Lubricate slightly the internal surface of the flange and orient it as follows drain port in flange should be rotated 11 left of release port in housing see Fig 1 line up the bolt holes of housing and flange 15 Mount flange to housing with 8 screws M8 and alternately torque them to 2 5 3 0 daNm using S6 Allen head spanner see Fig 1 ATTENTION The axial clearance between front and rear tapered bearing should be 0 04 0 1 mm It can be realized by decreasing the flange thickness 162. Install seal on plug and torque to 2 5 3 0 daNm using S6 Allen head spanner see Fig 1 For LBS plugs are 3 pcs and for LBV 4 pcs 17 Lubricate flange seal groove and external surface of shaft Place lubricated shaft seal high pressure in the flange and firmly push with Seal driver 18 Reposition brake assembly with output shaft up Lubricate dust seal and install in housing seal groove 19 Install key in shaft key groove For cone shafts install washer and screw castellated nut Disassembly and reassembly of LB 288 Follow the same disassembly and reassembly procedures as for LBS V 289 and LBS V 290 except following Disassembly 1 The plugs are mounted in housing not in flange Flange Fig 9 Hydraulic Brake type LB 288 LBS V 289 and LBS V 290 2 Separate O ring 82x2 from flange see Fig 9 There are no rear bearing and shaft seal 3 After dismounting of piston and bushing turn the brake unit with open side downwards Shake it slightly on soft surface Support rings sinter disks and steel disks will drop out 4 Reposition brake with output shaft up Shaft Seal Retaining ring Fig 10 Remove from housing shaft seal see Fig 10 Remove the retaining rings using utility pliers for holes and shaft 5 Place the brake in disassembly devise plate with central hole 83 with two pins opposite staved into it with the output shaft directed downwards Separate shaft from ho
3. SERVICE MANUAL Hydraulic Brakes type LB 288 LBS V 289 and LBS V 290 series 4 Euro and SAE versions Service Manual Hydraulic Brake type LB 288 Case Service Manual Hydraulic Brake type LBS V 289 a LB 289 21 GB 289 2 Bushing Service Manual Hydraulic Brake type LBS V 290 bj e W aa Dust Seal ousin l EY BWA LB 290 43 i aei LB 290 32 LB 290 2 Bushing KN Service Manual Disassembly Instructions in this manual are for brakes type LB Cleanliness is extremely important when repairing these brakes Work in clean area Before disassembly drain oil from brake If there is castellated nut washer or key they have to be removed from the shaft Although not all drawings show the brakes in disassembly devise we recommend that you keep brake clamped during disassembly For LBS V 289 and LBS V 290 1 Unscrew plugs 3 pcs for LB 288 and LBS 4 pcs for LBV using S6 Allen head spanner and set them in order aside incl seals Fig 1 2 Place the brake in disassembly devise plate with central hole 983 for LB 288 289 or 6125 127 for LBS LBV 290 with two pins opposite staved into it with the output shaft directed downwards Unscrew screws 8 pcs using Allen head spanner Note Unscrew the screws uniformly diametrically successively to prevent breaking the screw heads in re
4. g Pressure Steel Sinter Support A Static torque Brake type min disk disk ring ee ee PSI bar in lb daNm 58116 4350 531708 ee a a 4 8 300 6 8 116 232 1150 1327 LB 288 14 3 2 4 316 13 15 tacoma s 2 a fea ga on 17 23 20222 LBS 290 21 LB 288 32 246 333 2743 3009 LBS 289 32 4 3 3 17223 31 34 LB 288 43 246 333 3628 3982 LBS 289 43 5 4 27223 41 45 LBS 290 43 LB 288 63 246 333 4350 5310 5753 LBS 289 63 7 6 i 17 23 300 60 65 LBS 290 63 l
5. lements for defects availability of wearing marks and checking the weight and replace with new ones Sinter Disk Fig 4 10 With a small screwdriver remove dust seal from housing Knock the shaft seal out of housing using a soft bushing and a plastic hammer see Fig 5 Do not remove ftom housing outer bearing rim Shaft Seal Dust Seal Housing Fig 5 Seal Kits Euro version SK 41 5127 8032 for LB 288 series 4 SK 41 5127 8000 for LBS V 289 and LBS V 290 series 4 SAE version SK 41 5128 9500 for LB 288 series 4 SK 41 5128 9544 for LBS 289 and LBS 290 series 4 SK 41 5128 9619 for LBV 289 and LBV 290 series 4 Hydraulic Brake type LB 288 LBS V 289 and LBS V 290 1 CLEANING Wash all parts except seals in a weak solvent on carbon base and then degrease 2 MEASURING AND REPLACEMENT Measure all parts and compare their actual dimensions with the nominal ones given in the technical documentation Replace any parts with scratches or burrs that could cause leakage or damage with new ones Use new seals and washers when reassembling the motor 3 LUBRICATION Lubricate all friction parts which should be reassembled with light film of petroleum jelly Service Manual Reassembly 1 Place lubricated shaft seal 5 bar in the housing and firmly push with Seal driver see Fig 6 Press 0 D gt 48 Seal Driver Shaft Seal Housing Fig 6 2 If dismoun
6. sult of the spring pressure Remove flange incl shaft seal and outer rim of bearing see Fig 1 3 Remove from flange shaft seal Do not dismount outer rim of bearing from flange Hydraulic Brake type LB 288 LBS V 289 and LBS V 290 Inner rim of bearing 114 02x1 78 Adjustment Fi g 2 Washer 4 Remove piston from housing Use special tool with two screws M5x20 screwed in M5 holes to rest in advance and using a puller Take the O rings and the Back up rings out of piston and bushing grooves The piston will come out with inner rim of bearing adjustment washer and dick springs see Fig 2 5 Remove from housing groove O ring 114 2x1 78 Back up ring 109x114 2x1 4 Back up ring 71x76 2x1 4 Back up ring 109x114 2x1 4 109 5x3 O Ring 71x3 O Ring 109 5x3 Fig 3 6 Take the O ring 109 5x3 and the Back up ring 109x114 2x1 4 out of housing groove see Fig 3 7 Remove bushing carefully out of the brake housing using a puller with slight swivelling motions Remove from bushing groove O ring 71x3 and Back up ring 71x76 2x1 4 8 Take the O ring 109 5x3 and the Back up ring 109x114 2x1 4 out of housing groove see Fig 3 5 Service Manual Disassembly 9 Remove from housing whole assembly contained shaft inner rims of front ant rear bearings steel disks sinter disks and support rings see Fig 4 Separate the rims from shaft Check the friction e
7. ted stave the outer bearing rim of the front tapered bearing into the housing with the bigger diameter orientated to the housing using a bushing made from non ferrous metal bronze brass and sizes 055x 61x50 and a 2000daN press Fix the housing in reassembly devise plate with an 83 hole for LBS V 289 or 4125 127 for LBS V 290 and two pins on 106 3 Stave to the rest over the front part of shaft the inner bearing race and the roller retaining ring of the front tapered roller bearing Use a small press and an 36x 42x90 bushing Arrange correct the sinter disks beginning and finishing with the steel disk and engaging the sinter disks inner teeth with the shaft outer teeth Place support disks over friction pack See Table 1 for correct number of disks Place a slightly oiled safety metal cap for protecting the shaft seal ring lips on the assembled shaft Mount carefully the shaft assembly into the housing to the rest ATTENTION Before mounting grease well each friction dick The external 3 teeth of all steel disks should coincide with the grooves milled in the housing 4 Mount lubricated O ring 109x114 2x1 4 2 pes with back up ring 109 5x3 2 pcs into housing grooves see fig 7 ATTENTION Orient O ring to the arch sector of back up ring Hydraulic Brake type LB 288 LBS V 289 and LBS V 290 9 Mount lubricated O ring 71x3 with back up ring 71x76 2x1 4 into bushing grooves see Fig 7 PNS
8. using using a small press Remove bearing from shaft Reassembly 6 Using a small press and bushing made from non ferrous metal bronze brass stave to rest the radial bearing over the front part of shaft Mount the retaining ring in shaft in front of the bearing see Fig 10 7 With a small press sstave the assembled shaft in front part of the housing Mount the retaining ring in housing in front of the bearing Note The retaining rings are correct mounted when could be rotated over shaft axes 8 Place a safety cap over the shaft journal to protect the seal lips against breaking With seal driver stave in the housing shaft seal see Fig 11 8 Service Manual Hydraulic Brake type LB 288 LBS V 289 and LBS V 290 Reassembly 9 Turn the housing and place it in an assembling fixture plate with a central hole 83 and two pins of 6106 diametrically Arrange the steel and sinter disks successively in the housing along the shaft teeth 10 After mounting the flange to housing insert lubricated O ring 82x2 into flange seal groove and place face seal to protect flange surface ATTENTION 1 In all brakes friction disks and separators should be lubricated Space is filled with 50 120 cm mineral oil HLP DIN 51524 or HM ISO 6743 4 2 Hydraulic brake is delivered without oil it is lubricated only For LB 288 fill oil after hydraulic motor assembly Table 1 Openin
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