Gradall 544D (9136-4003) Service Manual - Manual (Page 333)

9.6
R EINSTALLING THE C OMPLETE B OOM A SSEMBLY
The assumption is made that all four boom sections are reassembled into one assembly as
when removed from the machine. Before reassembly of the boom, check the bores, pins
and bushings for damage. Repair as needed. Also check diameters of pins and bushings.
The dimensions of the pins and bushings used to fasten the boom assembly to the
machine frame are as follows:
Preparation
Re-check that the machine is still safely secured.
Procure lifting tackle and crane and re-lash the boom assembly at a balance point.
Install the tackle between the crowd cylinder and the boom.
Note! Make sure a tag line is installed.
Make a test lift to ensure that the rigging is hooked up correctly to lift the boom
assembly in a balanced mode.
Installation
Lubricate all pins and bushings.
Lift the boom assembly into position on the machine.
Line up the base pin holes, insert pins and lock in place.
Install lift cylinders onto the boom, insert pins and lock in place.
Install the compensation cylinder into the boom and lock in place.
Reconnect separated hoses and cables. Torque hose fittings per Appendix B.
Remove the rigging from the machine.
Test
Carefully start up the machine and operate the boom assembly full cycle at
least 10 times.
Check for hydraulic leaks; repair as necessary.
Cycle boom circuits 10 more times to be certain all air is purged from the system.
Final-adjust boom wear pads, extend & retract chains, hose take-up assembly
and any other area that needs to be serviced.
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