Relief Pressure Adjustment - Toyota 30 Series Manual

RELIEF PRESSURE ADJUSTMENT

Note:
Always make adjustment according to the procedure described below. Careless adjustment may
generate a high pressure to cause damage to the oil pump or other hydraulic devices.
Relief Set Pressure
Unit: kPa (kgf/cm
All models
171 60:~(175::)[2490:~]
Lift
Tilt
Install an oil pressure gage.
1.
2B) installed on top of the oil control valve, and install
the oil pressure gage.
2. Check loosening of the adjust screw.
(1) Remove the cap nuts and packings on top of the relief
valves. Loosen the adjust screw to a degree not to
come off from the body.
Turn the key switch on.
3.
4. Adjust the lift side relief pressure.
(1) Set the control lever to the lift position and gradually
tighten the adjust screw on the lift relief valve until the
fork starts to rise.
(2) Lift the forks to the maximum height, and read the pres-
sure gage. Adjust the oil pressure then to the speci-
fied level by turning the adjust screw.
Adjust the tilt side relief pressure.
5.
(1) Set the control lever at the backward tilt position, and
gradually tighten the adjust screw on the tilt relief valve
until the mast starts to be tilted backward.
(2) Tilt the mast fully backward, and read the oil pressure
gage. Adjust the oil pressure then to the specified level
2 ) [psi]
by turning the adjust screw.
6. After the adjustment, insert the packing and tighten the
cap nut. Inspect the relief pressure again.
7. Remove the oil pressure gage, and tighten the plug.