Service Manual Instruction Manual

SECTION 4 - BOOM & PLATFORM
3121171 – JLG Lift – 4-35
16. Install the pivot pin. Install the keeper pin and apply Loc-
tite #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 washers.
Tighten the clamp bolts enough to hold the pin clamp in
position for the following steps (5 ft. lbs. [7 Nm] maxi-
mum).
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. Pi vo t P in
2. Cro ss Bolt
3. Nut
4. Pi n Cl amp Bar
5. Cla mp Bolt
6. Jack S cre w
7. Jam Nut
Figure 4-23. Pin Clamp Detail