Kubota M5040, Workshop Manual

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8-S24
M5040, M6040, M7040, WSM HYDRAULIC SYSTEM
[6] RELIEF VALVE
Disassembling Relief Valve
1. Remove the relief valve assembly (1).
2. Secure the relief valve assembly (1) in a vise.
3. Loosen the lock nut (10).
4. Remove the adjuster (9), and remove the spring (8) and then pilot
valve (7).
5. Remove the valve seat (2), and draw out the valve seat (5), the
spring (4) and the main valve (3).
(When reassembling)
• Take care not to damage the O-ring.
IMPORTANT
Q
• After disassembling and assembling the relief valve, be sure
to adjust the relief valve setting pressure.
W1053972
[7] SAFETY VALVE
Disassembling Safety Valve
1. Remove the safety valve assembly (1).
2. Secure the safety valve assembly in a vise.
3. Loosen the lock nut (3), and remove the adjust screw (2).
4. Draw out the spring (4), seat (5) and ball (6).
(When reassembling)
• Install the safety valve to the hydraulic cylinder block, taking care
not to damage the O-ring.
W1054901
Tightening torque Relief valve
34.3 to 39.2 N·m
3.5 to 4.0 kgf·m
25.3 to 28.9 lbf·ft
(1) Relief Valve
(2) Valve Seat
(3) Main Valve
(4) Spring
(5) Valve Seat (6) Valve Body
(7) Pilot Valve
(8) Spring
(9) Adjuster
(10) Lock Nut
Tightening torque
Safety valve assembly
39.2 to 49.0 N·m
4.0 to 5.0 kgf·m
28.9 to 36.2 lbf·ft
Safety valve lock nut
58.8 to 78.5 N·m
6.0 to 8.0 kgf·m
43.4 to 57.9 lbf·ft
(1) Safety Valve Assembly
(2) Adjust Screw
(3) Lock Nut
(4) Spring (5) Seat
(6) Ball
(7) Housing
KiSC issued 06, 2008 A