HYDRAULIC SYSTEM
L3301, L3901, L4701, WSM
8-S14
[4] SAFETY VALVE
Safety Valve Setting Pressure Test Using Injection Nozzle
Tester
1. Remove the safety valve assembly (1).
2. Attach the safety valve to an injection nozzle tester with a safety
valve setting adaptor. (Refer to "SPECIAL TOOLS" (see page
G-94.).)
3. Measure the operating pressure of the safety valve.
4. If the operating pressure is not within the factory specifications,
adjust by turning the adjusting screw (2).
5. After adjustment, tighten the lock nut (3) firmly.
(When reassembling)
• Install the safety valve to the rear hydraulic block, being careful
not to damage the O-ring and apply transmission fluid.
• Use specified transmission fluid (Refer to "4.
LUBRICANTS, FUEL AND COOLANT" on page G-10.) to test
the operating pressure of the cylinder safety valve.
9Y1211012HYS0006US0
Tightening torque
Safety valve assembly
40 to 49 N·m
4.0 to 5.0 kgf·m
29 to 36 lbf·ft
Safety valve lock nut
59 to 78 N·m
6.0 to 8.0 kgf·m
44 to 57 lbf·ft
Safety valve operating
pressure
Factory specification
19.7 to 22.5 MPa
200 to 230 kgf/cm
2
2850 to 3270 psi
(1) Safety Valve Assembly
(2) Adjusting Screw
(3) Lock Nut
(4) Spring
(5) Seat
(6) Ball
(7) Housing
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