JLG G12-55A Service Manual - Manual (Page 58)

Boom
3-22 G10-55A, G12-55A
3. Inspect above pins for nicks or surface corrosion.
Use fine emery cloth to fix minor nicks or corrosion.
If damaged or if it cannot be repaired pin must
be replaced.
3.8.4 Manual Quick Switch Installation
1. Assemble quick switch assembly (10) to boom head
(14). Line up quick switch between mounts on boom
head. The quick switch should be centered in the
boom head.
2. Coat head pin (13) with an anti-seize compound.
Insert head pin through the quick switch assembly
and boom head. Secure with capscrew (11) and
locknut (12).
3. Align quick switch assembly with tilt cylinder pin and
insert tilt cylinder pin (9). Align tilt cylinder pin and
screw in locking bolt (8). Torque as required.
3.9 BOOM WEAR PADS
The wear pads on this machine are flat rectangular wear
pads with metal inserts.
A total of 42 wear pads are installed on the boom sections
of the G10-55A and the G12-55A machines.
3.9.1 Wear Pad Inspection
Inspect all wear pads for wear. If angle indicators (1) on
ends of wear pads are visible, wear pads can be reused.
If pads show uneven wear (front to back), they should be
replaced. Replace pads as a set if worn or damaged.
3.9.2 Wear Pad Installation and Lubrication
Note: Inspect all wear pads. Replace as necessary.
The following wear pad procedure must be followed to
insure the proper wear pad installation:
• Wear pad inserts and mounting bolts MUST be
clean from any grease, oil or other contaminates
before applying Loctite
® 242™ and installing
mounting bolts.
• Apply Loctite ® 242™ to all wear pad mounting bolts.
• A spacer (2) with holes must be used before any
shim (3) is used.
• A shim (3) must be inserted between spacer (2) and
wear pad support plate, block or boom section (4).
• The number of shims can vary at each shim point.
• The bottom wear pads must be shimmed equally on
each side.
Ma2070
1 1
MAM1390
4
3
2