JLG G12-55A Service Manual - Manual (Page 49)

3-13 G10-55A, G12-55A
Boom
4. Install the previously removed wear pad support (9)
at the front inside of the third boom section. Use the
previously removed hardened washers and bolts
(10). Torque as required.
5. Install the wear pads, spacers and shims on each
side and bottom (8 and 11) at the front of the third
boom section. Snug mounting bolts. Shim as needed
AFTER boom section is installed. Refer to Section
3.9.2, “Wear Pad Installation and Lubrication,” for
detailed information.
Note: Longer bolts (12) may be required to fully engage
the threaded inserts in the wear pads without allowing
bolts to protrude past the chamfer on the wear pads.
Refer to page 6, Wear Pad Installation and Lubrication
for detailed information.
3.5.9 Second Boom Section Assembly
1. Place second boom section onto suitable supports.
2. Install the previously removed chain roller (13) at the
rear of the second boom section. Insert the mounting
pin, retainer plate and hardware. Torque as required.
3. Install the wear pads and spacers (14, 15 and 16) at
the rear of the second boom section. Snug mounting
bolts. Shim as needed AFTER boom section is
installed. Refer to Section 3.9.2, “Wear Pad
Installation and Lubrication,” for detailed information.
3.5.10 Third and Fourth Boom
Section Installation
Note: Refer to Section 2.3, “Torque Charts,” for
standard bolt torque information.
Note: Refer to Section 2.3.3, “Hydraulic Hose Torque
Chart,” for standard hose torque information.
Note: Apply Loctite ® 242 ™ to all boom assembly bolts.
Note: Using a straight bar approximately 40 in
(1041 mm) long will aid in the installation of the wear
pads located on the inside front of each boom section.
1. Place the sling or using two slings for better stability,
around the third boom section and slowly insert
the third and fourth boom sections into the second
boom section being careful not to damage any
surrounding components.
MY3510
9
12
11
10
12
10
11
MY4160
13
15
14
16
15
16
14