Relief Valve Adjustment 1900 SRM 964
13. After the proper relief pressure is obtained, lower
the forks completely to relieve pressure from hy-
draulic circuit.
14. Turn the key switch to the OFF position. Discon-
nect the battery.
15. Discharge the capacitor. See Special Precau-
tions.
16. Removethepressuregaugeandtee.
17. Reconnect the hydraulic hose to pump.
18. Connect the battery and turn the key switch to
ON position.
19. Operate the hydraulic functions several times to
purge the air from the hydraulic circuit.
20. Remove blocks from wheels.
21. Test the lift truck by lifting and lowering a load
several times. Visually check for leaks.
CAUTION
DO NOT OVERFILL. Oil will leak from the
breather/filler cap if too full.
22. Check the hydraulic oil level in the reservoir.
Remove breather cap and add recommended hy-
draulic oil to proper level, as required. See Hy-
draulic Reservoir, Table 1.
23. Install the drive unit compartment covers. See
Drive Unit Compartment Covers.
ADJUST RELIEF VALVE PRESSURE
B60Z, B60Z
AC
, C60Z, C60Z
AC
, and W60Z
Refer to Relief Valve Pressure Check to determine if
adjustment is necessary.
1. Verify the key switch is in the OFF position and
the battery is disconnected.
WARNING
Always wear the
proper protective equipment
including eye p
rotection and petroleum-resis-
tant gloves wh
en handling hydraulic oil. Thor-
oughly wash oi
l from exposed areas of skin as
soon as possib
le.
CAUTION
Protect the hydraulic system from dirt and
contaminants when servicing the hydraulic
system.
2. Remove the hydraulic reservoir. See Lift Pump
and Motor, Remove Reservoir.
3. Loosen the locking nut on the relief valve. See
Figure 14.
4. Adjust the relief valve screw in small increments.
Turn the adjustment screw clockwise to increase
pressure. Turn the adjustment screw counter-
clockwise to decrease pressure.
5. Tighten the lock nut and torque to 15 N•m
(11 lbf ft).
6. Install the hydraulic reservoir. See Lift Pump
and Motor, Install Reservoir to Pump.
Connect the battery and turn the key switch to the
ON position.
7. Recheck the relief pressure. See Relief Valve
Pressure Check.
8. Repeat as necessary, until the correct relief pres-
sure is measured.
9. Perform Step 13 through Step 23 in Relief Valve
Pressure Check to complete procedure.
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