SECTION 4 - BOOM & PLATFORM
4-36
31215031
Installing Counterbalance Valve
Refer to Figure 4-13., Rotator Counterbalance Valve.
1.
Make sure surface of actuator is clean and free of any
contamination and debris, including old Threadlocking
Compound.
2.
Make sure new valve has the O-rings in counterbores of
valve to seal it to the actuator housing.
3.
Bolts that come with valve are Grade 8 bolts. Install new
bolts with a new valve. Apply Medium Strength Thread-
locking Compound to shanks of the three bolts at time
of installation.
4.
Torque 1/4-inch bolts 110-120 in-lb (12.4-13.5 Nm). Do
not torque over 125 in-lb (14.1 Nm). Torque 5/16-inch
bolts to 140 in-lb (15.8 Nm). Do not torque over 145 in-lb
(16.3 Nm).
Figure 4-13. Rotator Counterbalance Valve
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