JLG 1250AJP Service Manual - Manual (Page 259)

SECTION 4 - BOOM & PLATFORM
3121171 – JLG Lift – 4-19
4.18 TOWER BOOM
Installation and Assembly
NOTE: To ease assembly of the tower base boom to the
machine, have the base section slightly tilted down-
ward towards the pivot pin bushings.
1. Use an overhead crane or other suitable lifting
device, and maneuver the tower boom base section
in place. Install the pivot pin. Install the keeper pin
and apply Loctite #271 to the retaining bolt. Torque
the bolt to 285 ft. lbs. (386 Nm).
NOTE: The tower lift cylinder weighs approximately 643
pounds (292 kg).
2. Use a ratchet strap to carefully raise the lift cylinder
up into position under the boom.
3. Place blocking under the front of the tower base and
move the lifting strap out to the end of the tower
base section.
4. Lift the tower base section up and extend the lift cyl-
inder to align it with the attachment lugs. Refer to the
Service Mode procedure in Section 4.24, Tower Lift
Cylinder.
5. When the lift cylinder and tower base pivot holes are
aligned, install the pivot pin. Install the keeper pin
and apply Loctite #271 to the retaining bolt. Torque
the bolt to 285 ft. lbs. (386 Nm).