JLG G6-42A Service Manual - Manual (Page 50)

Boom
3-12 G6-42A, G9-43A, G10-43A
20. Align the push beam bores with the second boom
section bores and install the previously removed
pins (11).
Note: Verify the cross holes in push beam pins align
with holes in each pin bore on the second boom section.
21. Install the previously removed tilt cylinder hose guide
(12) and if equipped, the auxiliary hose guide at the
rear of the third boom section using the existing
hardware. Torque as required.
22. Install the previously removed wear pad and spacer
(13) on the left or right side of the third boom section.
Snug mounting bolts. Shim as needed AFTER boom
section is installed. Refer to Section 3.11.2, “Wear
Pad Installation and Lubrication,” for detailed
information.
23. Install the previously removed wear pad and spacer
(14) on the top of the third boom section. Snug
mounting bolts. Shim as needed AFTER boom
section is installed. Refer to Section 3.11.2, “Wear
Pad Installation and Lubrication,” for detailed
information.
24. Install the previously removed wear pad and spacer
(15) on the bottom rear of the second boom section.
Snug mounting bolts. Shim as needed AFTER boom
section is installed. Refer to Section 3.11.2, “Wear
Pad Installation and Lubrication,” for detailed
information.
25. Install the previously removed wear pad and spacer
(16) on the left or right side of the second boom
section. Snug mounting bolts. Shim as needed
AFTER boom section is installed. Refer to Section
3.11.2, “Wear Pad Installation and Lubrication,” for
detailed information.
26. Install the previously removed counterbalance valve
(17). Torque to 44 lb-ft (59,7 Nm).
27. Torque all wear pad mounting bolts as required.
3.5.6 Second and Third Boom Section
Installation
Note: Using a straight bar approximately 20 in
(508 mm) long will aid in the installation of the wear pads
located on the inside front of each boom section.
1. Lubricate the bottom of the second boom section
where the wear pads of the first boom section
contact the second boom section.
2. Place the sling, or two slings for better stability,
around the third boom section and slowly insert the
second and third boom section into the first boom
section being careful not to damage hoses, chains
and/or surrounding components.
3. Lower the second and third boom section onto a
suitable support, relocate one sling and insert the
second and third boom section assembly allowing
access for the installation of the bottom plate, wear
pads, spacers and shims at the front of the first
boom section.
MY3880
12
11
12
11
MY3910
13
14
13
14
MY3880
15
16
15
16
17