Kubota WSM BT603, Руководство по ремонту

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3.2 Structure of mid and rear PTO ........................................................................................................4-21
4. Others.....................................................................................................................................................4-22
4.1 Hydraulic pump drive gear section..................................................................................................4-22
4.1.1 Structure of hydraulic pump drive gear...................................................................................4-22
SERVICING .....................................................................................................................................................4-23
1. Troubleshooting for transaxle .................................................................................................................4-23
2. Servicing specifications for transaxle .....................................................................................................4-27
3. Tightening torques for transaxle .............................................................................................................4-28
4. Checking and adjusting ..........................................................................................................................4-29
4.1 Adjusting maximum speed ..............................................................................................................4-29
4.2 Adjusting HST neutral position........................................................................................................4-29
4.3 Checking and adjusting HST neutral spring (dynamic braking) ...................................................... 4-30
4.4 Checking charge relief pressure .....................................................................................................4-31
4.5 Checking high relief pressure (Forward) .........................................................................................4-32
4.6 Checking high relief pressure (Reverse).........................................................................................4-33
4.7 Readjusting relief valve (When HST does not work due to its loose hexagon socket head screw) 4-33
4.8 Checking PTO clutch operating pressure........................................................................................4-34
4.9 Adjusting brake pedal free travel.....................................................................................................4-35
5. Disassembling and assembling ..............................................................................................................4-35
5.1 Separating transaxle .......................................................................................................................4-35
5.1.1 Draining transmission fluid......................................................................................................4-35
5.1.2 Removing battery....................................................................................................................4-36
5.1.3 Removing lift rod and lower link..............................................................................................4-36
5.1.4 Removing ROPS ....................................................................................................................4-37
5.1.5 Removing seat........................................................................................................................4-37
5.1.6 Removing step........................................................................................................................4-37
5.1.7 Removing fender ....................................................................................................................4-38
5.1.8 Removing fuel tank .................................................................................................................4-38
5.1.9 Removing rear wheel..............................................................................................................4-39
5.1.10 Removing fender center stay................................................................................................4-39
5.1.11 Removing fender bracket and hitch plate..............................................................................4-39
5.1.12 Removing transaxle assembly..............................................................................................4-40
5.1.13 Removing brake pedal..........................................................................................................4-41
5.1.14 Removing propeller shaft......................................................................................................4-41
5.1.15 Removing differential lock pedal ...........................................................................................4-41
5.1.16 Removing speed control pedal, HST damper, and cruise rod .............................................. 4-42
5.2 Hydrostatic transmission .................................................................................................................4-42
5.2.1 Removing levers and mower lift arm ......................................................................................4-42
5.2.2 Removing PTO clutch valve....................................................................................................4-43
5.2.3 Removing oil cooler cover ......................................................................................................4-43
5.2.4 Removing center section and valve plates .............................................................................4-43
5.2.5 Removing check and high pressure relief valve plug .............................................................4-44
5.2.6 Checking check and high pressure relief valve ......................................................................4-44
5.2.7 Removing cylinder block.........................................................................................................4-45
5.2.8 Removing cylinder block and piston .......................................................................................4-45
5.2.9 Removing swashplate and trust roller bearing........................................................................4-46
5.2.10 Removing 4WD detent ball ...................................................................................................4-47
5.2.11 Removing neutral arm and trunnion arm...............................................................................4-47
5.3 Hydraulic cylinder............................................................................................................................4-47
5.3.1 Removing hydraulic cylinder...................................................................................................4-47
5.4 Transaxle shafts ..............................................................................................................................4-48
5.4.1 Removing transaxle case front cover .....................................................................................4-48
5.4.2 Removing hydraulic pump assembly ......................................................................................4-49
5.4.3 Removing rear PTO cover assembly ......................................................................................4-50
5.4.4 Disassembling rear axle (L.H.) ...............................................................................................4-50
5.4.5 Removing rear axle case (R.H.) .............................................................................................4-51
5.4.6 Removing 66T final gear.........................................................................................................4-52
5.4.7 Removing rear axle case, R.H. and brake..............................................................................4-53
BX23S, LA340, BT603, RCK54D, RCK60D, RCK54, RCK60B
vii
KiSC issued 03, 2017 A
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