JLG 800A_AJ ANSI Service Manual - Manual (Page 238)

SECTION 4 - BOOM & PLATFORM
4-24 – JLG Lift – 3120740
4.11 WEAR PADS
Tower Boom
1. Shim up wear pads until 1/32 inch (0.8 mm) clear-
ance to adjacent surface.
2. Replace wear pads when worn to within 1/16 inch
(1.59 mm) of threaded insert.
NOTE: Wear pads are made of polyethylene; these pads are
intended to slide on polyurethane painted surfaces.
3. When adjusting wear pads, removing or adding
shims, bolt length must also be changed.
a. When adding shims, longer bolts must be used
to ensure proper thread engagement in insert.
b. When shims are removed, shorter bolts must be
used so bolt does not protrude from insert and
come into contact with boom surface.
Upper Boom
1. Shim up wear pads to within 1/32 inch (.79 mm)
clearance between wear pad and adjacent surface.
2. Replace wear pads when worn within 1/16 inch (1.59
mm) and 1/8 inch (3.18 mm) - B, C, D of threaded
insert. See Figure 4-16., Location And Thickness Of
Wear Pads
3. Adjusting wear pads, removing or adding shims,
bolt length must also be changed.
a. When adding shims, longer bolts must be used
to ensure proper thread engagement in insert.
b. When shims are removed, shorter bolts must be
used so bolt does not protrude from insert and
Sheaves and wire rope must be replaced as
sets.
4.12 ROTATOR (PRIOR TO S/N 0300067538)
Disassembly
1. Place actuator on a clean workbench.
2. Remove all hydraulic fittings.
3. Using a suitable hammer and chisel remove the por-
tion of end cap securing setscrew.
4. Using a torch, apply heat to the setscrews on the
bottom of actuator.
Figure 4-16. Location And Thickness Of Wear Pads
WEAR PADS
PAD
NUMBER
THICKNESS
OF NEW PAD
REPLACE WHEN
WORN TO
A 5/8" (15.8 mm) 9/16" (14.3 mm)
B 3/4" (19.0 mm) 5/8" (15.8 mm)