NOTICE: IF PERFORMING MAINTENANCE ON THE BOOM, DO NOT USE A LIFTING DEVICE TO LIFT THE BOOMS UNLESS THE HOLDING VALVES HAVE BEEN REMOVED FIRST. FAILURE TO DO SO WILL RESULT IN SEVERE DAMAGE TO THE BOOM.
Removal of the Boom Assembly
Remove the platform and platform support as follows
NOTE: When removing the retaining pin from the rod end of the level cylinder, make sure the cylinder is properly supported.
Remove the boom from the turntable as follows:
NOTICE: HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDIATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF CONTAMINANTS INTO SYSTEM.
Disassembly of the Main Boom
NOTICE: WHEN REMOVING TELESCOPE CYLINDER FROM BOOM SECTIONS. CARE SHOULD BE TAKEN NOT TO LEAVE CYLINDER REST ON POWERTRACK WHICH COULD CAUSE DAMAGE TO POWERTRACK
Inspect all boom pivot pins for wear, scoring or other damage, and for tapering or ovality. Replace pins as necessary
Inspect lift cylinder pins for wear, scoring or other damage, and for tapering or ovality. Ensure pin surfaces are protected prior to installation. Replace pins as necessary
Inspect telescope cylinder rod attach pin for wear, scoring or other damage. Replace pin as necessary.
Inspect inner diameter of boom pivot bushings for scoring, distortion, wear or other damage. Replace bushings as necessary.
Inspect wear pads for wear.
Inspect all threaded components for damage such as stretching, thread deformation, or twisting. Replace as necessary.
Inspect structural units of boom assembly for bending, cracking, separation of welds, or other damage. Replace boom sections as necessary.
Assembly of the Main Boom
NOTICE: WHEN INSERTING THE TELESCOPE CYLINDER INTO THE BOOM, CARE MUST BE TAKEN NOT TO DAMAGE THE POWER TRACK ASSEMBLY
Installation of the Boom Assembly
Source: MaintainX (Community Member)