Safety Valve Setting Pressure Test Using Injection Nozzle; operating pressure of the cylinder safety valve.- Page 565

HYDRAULIC SYSTEM

L3560, L4060, L4760, L5060, L5460, L6060, WSM

8-S12

Safety Valve Setting Pressure Test Using Injection Nozzle
Tester

1. Remove the safety valve assembly (1).

2. Attach the safety valve assembly (1) to a safety valve tester with

a safety valve setting adaptor (see page G-69).

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)

• When installing the safety valve to the rear hydraulic block, be

careful not to damage the O-ring and apply transmission fluid.

NOTE

• Use specified transmission fluid (see page G-9) to test the

operating pressure of the cylinder safety valve.

9Y1210824HYS0009US0

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

19.6 to 22.6 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

KiSC issued 03, 2016 A