8-S12
MX5100, WSM
HYDRAULIC SYSTEM
Position Control Feedback Rod Adjustment
1. Set the position control lever (1) (the draft control lever (2), if
equipped) to the lowest position.
2. Start the engine and set the engine at idling speed (allow the
engine to warm up for approx. 5 minutes).
3. Move the position control lever (1) to the uppermost position.
[Contact to the position control lever stopper (3).]
4. Turn the adjusting nut (4) and lock nut (5) together clockwise until
the relief valve begins to be operated.
5. Turn the adjusting nut (4) and lock nut (5) together counter
clockwise 2 turns.
6. Tighten the lock nut (5).
7. Set the engine speed at the maximum.
8. Move the position control lever (1) to the lowest position and
uppermost position (3 to 5 times) to check the relief valve does
not operate.
9. Set the position control lever (1) to the uppermost position, then
move the lift arm to the upper end by hand and measure the free
play.
10.Stop the engine.
11.If the measurement is not within the factory specifications,
adjusting position control feedback rod again.
W1020369
Cylinder Safety Valve Operating Pressure
1. Install the cylinder safety valve to the cylinder safety valve setting
pressure adaptor.
2. Set the cylinder safety valve setting pressure adaptor to the
nozzle tester.
3. Measure the cylinder safety valve operating pressure.
4. If the operating pressure is not within the factory specifications,
adjust the operating pressure by turning the adjusting screw (4).
5. After adjustment, tighten the lock nut (5) firmly.
• Use specified transmission fluid to measure the cylinder
safety valve operating pressure.
W1025307
Lift arm free play at
maximum raising
position
Factory spec.
10 to 15 mm
0.39 to 0.58 in.
(1) Position Control Lever
(2) Draft Control Lever (If Equipped)
(3) Position Control Feedback Rod
(4) Adjusting Nut
(5) Lock Nut
A : Lift Arm Free Play
Hydraulic c4ylinder
safety valve operating
pressure
Factory spec.
19.6 to 22.6 MPa
200 to 230 kgf/cm
2
2845 to 3277 psi
Tightening torque
Cylinder 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) Cylinder Safety Valve
(2) Cylinder Safety Valve Setting
Pressure Adaptor
(3) Nozzle Tester
(4) Adjusting Screw
(5) Lock Nut
(6) Spring
(7) Seat
(8) Ball
(9) Housing
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