JLG 1250AJP Service Manual - Manual (Page 275)

SECTION 4 - BOOM & PLATFORM
3121171 – JLG Lift – 4-35
16. Install the pivot pin. Install the keeper pin and apply
Loctite #271 to the retaining bolt. Torque the bolt to
675 ft. lbs. (915 Nm).
NOTE: The main boom assembly weighs approximately
5,186 lbs. (2357 kg).
17. Lift the main boom in position to align the pivot pin
bushings in the main boom and tower boom. Install
the main boom pivot pin as described in the Pin
Clamp Installation Procedure below.
18. Lift the upper link into position to align the pivot pin
holes in the main boom with the pivot pin bushings
in the upper link. Install the keeper pin and apply
Loctite #271 to the retaining bolt. Torque the bolt to
285 ft.lbs. (386Nm).
Pin Clamp Installation Procedure
1. Install the main boom pivot pin and loosely install
the cross bolt and nut.
2. Install the pin clamp bar. Clamp the bolts and wash-
ers. Tighten the clamp bolts enough to hold the pin
clamp in position for the following steps (5 ft. lbs. [7
Nm] maximum).
3. Install the jack screws and jam nuts. Torque the jack
screws to 600 ft. lbs. (813 Nm). Torque the jam nuts
to 200 ft. lbs. (271 Nm).
4. Torque the clamp bolts to 190 ft. lbs. (260 Nm).
5. Torque the cross bolt and nut to 190 ft. lbs. (260
Nm).
1. Pivot Pin
2. Cross Bolt
3. Nut
4. Pin Clamp Bar
5. Clamp Bolt
6. Jack Screw
7. Jam Nut
Figure 4-23. Pin Clamp Detail