JLG 510AJ Service Manual - Manual (Page 219)

SECTION 4 - BOOM AND PLATFORM
3121181 – JLG Lift – 4-21
Installing Counterbalance Valve
Refer to Figure 4-8., Rotator Counterbalance Valve.
1. Make sure actuator surface is clean and free of any con-
tamination and foreign debris - including old Loctite.
2. Make sure new valve has O-rings in counter-bores of
valve to seal it to the actuator housing.
3. Bolts that come with the valve are grade 8 bolts. New
bolts should be installed with a new valve. Apply Loctite
#242 to shank of three bolts at time of installation.
4. Torque 1/4" bolts 110 - 120 in-lb (12.4 to 13.5 Nm). Do
not torque over 125 in-lb (14.1 Nm). Torque 5/16" bolts
140 in-lb (15.8 Nm). Do not torque over 145 in-lb (16.3
Nm).
Figure 4-8. Rotator Counterbalance Valve