JLG 600A_AJ Service Manual - Manual (Page 177)

SECTION 4 - BOOM & PLATFORM
3121201 – JLG Lift – 4-1
SECTION 4. BOOM & PLATFORM
4.1 WEAR PADS Tower Boom
1. Shim up wear pads until snug to adjacent surface.
2. Replace wear pads when worn within 1/16 inch (1.59
mm) of threaded insert.
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.
Main Boom
1. Shim up wear pads to within 1/32 inch (.79 mm) tol-
erance 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 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
come into contact with boom surface.
Figure 4-1. Location and Thickness of Wear Pads