JLG G5-18A Service Manual - Manual (Page 42)

Boom
3-10 G5-18A, 2505H, 25.5
• The number of shims can vary at each shim point.
• The bottom wear pads must be shimmed equally on
each side.
• Maintain a total boom section clearance of
0.070-0.130 in (1,78-3,30 mm) both the horizontal
and vertical directions.
• The length of wear pad bolt depends on number of
shims, spacers and washers being used.
• The thickness of each threaded wear pad insert is
0.312 in (7,92 mm)(A).
• The bolt length should be determined by measuring
distance from face of insert to face of boom (B)
including any spacer, shim(s) and washer(s).
• Bolt thread engagement in wear pad insert should
be 0.275 ± 0.040 in (6,98 ± 1,0 mm).
• One or two hardened washers are to be used on
each wear pad bolt except where noted otherwise.
DO NOT use more than two hardened washers.
• Use only one hardened washer if mounting bolts
are recessed.
• Wear Pad Bolt Torque:
3/8–24 Bolt, 32–37 lb-ft (43–50 Nm)
3/8–24 Hollow Bolt, 15–17 lb-ft (20–23 Nm)
1/2–20 Bolt, 76–86 lb-ft (103–116 Nm)
1/2–20 Hollow Bolt, 45–50 lb-ft (61–68 Nm)
• Torque wear pad bolts after shimming is completed.
• Lubricate face and pockets of each wear pad after
being installed.
3.5.3 Boom Wear Pad Lubrication
After replacing any wear pads or after prolonged periods
of inoperation, Lubrication of boom wear surfaces with
grease is recommended to keep boom wear surfaces
lubricated properly. Lubrication of boom wear surfaces is
also recommended when machine is stored, to help
prevent rusting. Refer to Section 2.4, “Fluids, Lubricants
and Capacities.”
Note: The first shim under the pad needs to contain
holes, instead of slots.
3.6 QUICK ATTACH ASSEMBLY
3.6.1 Quick Attach Assembly Removal
1. Park machine on a hard, level surface.
2. Fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL.
3. Engage park brake and shut engine OFF.
4. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
5. Properly disconnect battery.
6. Open engine cover. Allow system fluids to cool.
7. If equipped with a hydraulic quick attach device,
remove both hydraulic hoses (5) from valve on left
side of boom head. Plug and cap hose ends to
prevent dirt and debris from entering system.
8. Remove the lock bolt (6) holding tilt cylinder rod
end pin (7) to quick attach assembly. Remove pin.
9. Support quick attach assembly. Remove lock
bolt (8) holding quick attach pin (9) to quick attach
assembly. Remove pin.
10. Inspect pins for nicks or surface corrosion.
Use fine emery cloth to fix minor nicks or corrosion.
11. Replace pins if damaged or beyond repair.
MY3620
A
B
MY2660
5
6
7
8
9