LOAD KING 35-127 M, Operator'S Manual

Page: 120 / 216

120
35-127 M
Operating Instructions
Emergency Rotation
The
Load King
Boom Truck is equipped with a spring applied, pressure released rotation brake� This
brake will only allow rotation if there is sufficient hydraulic pressure� In case of hydraulic failure this brake
will have to be HYDRAULICALLY released� This may be accomplished with the following procedures:
1� Use emergency retraction procedures to fully retract the boom�
2� Use emergency lowering procedures to lower the boom about 1 foot above the boom rest�
Attach a tag line to the boom�
3� Plumb a PORT-A-POWER or other hydraulic source into the brake port on the rotation gearbox�
4� Remove counterbalance valve cartridges from motor�
5� Pressurize the brake port to 600 PSI and rotate boom over boom rest with a tag line�
Oil will be lost through counterbalance valve cavities as the boom is rotated� Catch any spilled oil
in a pan�
6� Release hydraulic pressure and reattach brake line� Reinstall counterbalance valves�
ONCE BOOM IS IN BOOM REST, USE STRAPS TO SECURE BOOM INTO BOOM
REST FOR ROADING� IF HOOK BLOCK OR LOAD BALL CANNOT BE SECURED
TO TIEDOWN POINT, REMOVE IT AND SECURE ANY LOOSE WINCH CABLES�