Service Manual Instruction Manual

SECTION 4 - BOOM & PLATFORM
4-84 – JLG Lift – 3121171
27. Support the upper link using a nylon strap or blocking.
Remove the bolt, keeper, and pin securing the upper
link to the base boom. Carefully lower the upper link
enough to allow the telescope cylinder to be removed.
NOTE: The telescope cylinder weighs approximately 663 lbs. (300
kg).
28. Carefully remove the telescope cylinder from the rear of
the main boom, repositioning the blocking and lifting
straps to prevent the cylinder from falling.
Installation
NOTE: The telescope cylinder weighs approximately 663 lbs. (300
kg).
1. Carefully install the telescope cylinder into the rear of
the main boom. Place blocking under the cylinder to
support it inside the boom and reposition the lifting
straps balance the load.
2. Connect the hydraulic lines running to the telescope cyl-
inder as tagged during removal.
3. Install the bolt and keeper pin securing the cylinder
retaining pin in place. Remove the retaining pin.
4. If necessary, refer to Removal and use the analyzer Ser-
vice Mode to cycle the cylinder in and out several times
to purge air from the cylinder.