Installing counterbalance valve, Installing counterbalance valve -21, Rotator counterbalance valve -21 – JLG 510AJ Service Manual User Manual
Page 219
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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
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