JLG 450A_AJ Series II Service Manual - Manual (Page 289)

SECTION 4 - BOOM & PLATFORM
3121180 – JLG Lift – 4-23
Installing Counterbalance Valve
Refer to Figure 4-9., Rotator Counterbalance Valve.
1. Clean actuator surface of any contamination and for-
eign debris including old Loctite.
2. Make sure new valve has O-rings in counterbores of
valve to seal it to actuator housing.
3. Bolts that come with valve are grade 8 bolts. Install
new bolts with a new valve. Apply Loctite #242 to
the shank of three bolts during installation.
4. Torque 1/4" bolts 110 to 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 4-9. Rotator Counterbalance Valve