JLG 1250AJP Service Manual - Manual (Page 324)

SECTION 4 - BOOM & PLATFORM
4-84 – JLG Lift – 3121171
27. Support the upper link using a nylon strap or block-
ing. 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 lift-
ing straps balance the load.
2. Connect the hydraulic lines running to the telescope
cylinder 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
Service Mode to cycle the cylinder in and out several
times to purge air from the cylinder.