Kubota ,RCK60B-23BX Workshop Manual Download

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6.5.1 Checking cylinder wear...........................................................................................................3-76
6.5.2 Correcting cylinder (Oversize) ................................................................................................3-76

6.6 Oil pump..........................................................................................................................................3-77

6.6.1 Checking rotor lobe clearance ................................................................................................3-77
6.6.2 Checking clearance between outer rotor and pump body ...................................................... 3-77
6.6.3 Checking clearance between rotor and cover ........................................................................3-78

6.7 Relief valve spring...........................................................................................................................3-78

6.7.1 Checking relief valve...............................................................................................................3-78

4. TRANSAXLE

MECHANISM .....................................................................................................................................................4-1

1. Structure of transaxle ...............................................................................................................................4-1
2. Traveling system.......................................................................................................................................4-2

2.1 Hydrostatic transmission ...................................................................................................................4-2

2.1.1 Structure of hydrostatic transmission........................................................................................4-2
2.1.2 Oil flow of hydrostatic transmission ..........................................................................................4-3
2.1.3 Structure of HST control linkage...............................................................................................4-8
2.1.4 Speed set linkage .....................................................................................................................4-9

2.2 Range gear shift section .................................................................................................................4-12

2.2.1 Structure of range gear shift ...................................................................................................4-12

2.3 Front wheel drive section ................................................................................................................4-13

2.3.1 Structure of front wheel drive..................................................................................................4-13

2.4 Differential gear section...................................................................................................................4-14

2.4.1 Structure of differential gears..................................................................................................4-14
2.4.2 Structure of differential lock ....................................................................................................4-16

2.5 Brake section ..................................................................................................................................4-17

2.5.1 Structure of brake system.......................................................................................................4-17

3. PTO system ............................................................................................................................................4-19

3.1 Structure of PTO system .................................................................................................................4-19

3.1.1 Function of PTO clutch relief valve .........................................................................................4-20
3.1.2 Engaged function of PTO clutch .............................................................................................4-20
3.1.3 Disengaged function of PTO clutch ........................................................................................4-20

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........................................................................................4-35
4.9 Adjusting brake pedal free travel.....................................................................................................4-35

5. Disassembling and assembling ..............................................................................................................4-36

5.1 Separating transaxle .......................................................................................................................4-36

5.1.1 Draining transmission fluid......................................................................................................4-36
5.1.2 Removing battery....................................................................................................................4-36
5.1.3 Removing lift rod and lower link..............................................................................................4-37
5.1.4 Removing ROPS ....................................................................................................................4-37
5.1.5 Removing seat........................................................................................................................4-37
5.1.6 Removing step........................................................................................................................4-38

Kubota ,RCK60B-23BX, Workshop Manual

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