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

Boom
3-12 G6-42A, G9-43A, G10-43A
Note: Keep the retract and extend chain free of any dirt
and/or contaminates.
15. Remove the Temporary Extend Chain Bracket.
16. Install previously removed pin (6), chain roller (7), tilt
hose sheave (8) and if equipped, auxiliary hose
sheave assemblies at rear of the second boom
section with existing hardware and shim as required.
17. Thrust washers (9) are to be used as required to
shim the hose sheave and retract chain sheave
within 0.0625 in (1,6 mm) of a tight fit. At least one
thrust washer (9) is required at each noted location.
18. Center the retract chain sheave (10) between the
mounting plates.
19. Feed the tilt cylinder hoses and (if equipped) the
auxiliary hoses over and around the hose sheaves.
20. Align push beam bores with second boom section
bores and install 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 previously removed wear pad and
spacer (13) on left or right side of third boom
section. Snug mounting bolts. Shim as needed
AFTER boom section is installed. Refer to Section
3.10.2, “Wear Pad Installation and Lubrication,” for
detailed information.
23. Install previously removed wear pad and spacer (14)
on top of the third boom section. Snug mounting
bolts. Shim as needed AFTER boom section is
installed. Refer to Section 3.10.2, “Wear Pad
Installation and Lubrication,” for detailed information.
MY3960
7
8
6
MY3970
10
9
9
9 9 9 9
MY3880
12
11
12
11
MY3910
13
14
13
14