Kubota M108S, Workshop Manual

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8-S15
M108S, WSM HYDRAULIC SYSTEM
Plug and Unload Valve
1. Secure the control valve with a vise.
2. Remove the seat plug 1 (1) for unload poppet 1 (3).
3. Draw out the spring (2) for unload poppet 1 (3).
4. Remove the seat plug 2 (4) for unload poppet 2 (6).
5. Draw out the spring (5) and unload poppet 2 (6).
(When reassembling)
• Install the plug, noting O-ring.
W1040681
Spool and Poppet Valve
1. Remove the lock nut (1) for spool (5).
2. Draw out the spool (5).
3. Remove the seat plug (4) for poppet valve (2).
4. Draw out the spring (3), collar and poppet valve (2).
(When reassembling)
• Install the poppet valve, noting O-ring and backup ring.
W1041830
Check Valve
1. Remove the seat plug (3).
2. Draw out the spring (2) and check valve (1).
(When reassembling)
• Install the plug, noting O-ring.
W1042131
Tightening torque
Seat plug 1
40 to 58 N·m
4.0 to 6.0 kgf·m
29 to 43 lbf·ft
Seat plug 2
40 to 58 N·m
4.0 to 6.0 kgf·m
29 to 43 lbf·ft
(1) Seat Plug 1
(2) Spring
(3) Unload Poppet 1 (4) Seat Plug 2
(5) Spring
(6) Unload Poppet 2
Tightening torque
Seat plug
40 to 58 N·m
4.0 to 6.0 kgf·m
29 to 43 lbf·ft
Lock nut
16 to 19 N·m
1.6 to 2.0 kgf·m
12 to 14 lbf·ft
(1) Lock Nut
(2) Poppet Valve
(3) Spring (4) Seat Plug
(5) Spool
(6) Spring
Tightening torque Seat plug
30 to 49 N·m
3.0 to 5.0 kgf·m
22 to 36 lbf·ft
(1) Check Valve
(2) Spring (3) Seat Plug
KiSC issued 06, 2007 A