JLG T500J, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3121200 4-5
4.4 MAIN BOOM ASSEMBLY
Removal
NOTE: Prior to removing the boom, it will be helpful to extend the
boom fly section out far enough to access the telescope cyl-
inder retaining pin if the boom is to be disassembled.
1. Using an adequate lifting device, support the weight of
the main boom.
NOTE: The main boom weighs approximately 1455 lbs. (660 kg).
2. To gain access to the tele cylinder, remove the master
cylinder. Refer Section 4.6, Master Cylinder.
3. Tag and disconnect the hydraulic hoses at the rear of the
telescope cylinder.
4. Place blocking under the lift cylinder to prevent it from
dropping. Remove the bolt, keeper pin, and pivot pin
securing the rod end of the lift cylinder to the boom.
5. Remove the bolt, nut, and pivot pin securing the top of
the timing link to the boom.
6. Remove the bolt, keeper pin, and pivot pin securing the
boom to the turntable. Lift the boom away from the
machine and place it on proper supports for servicing.
MAE29050