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

Boom
3-24 G10-55A, G12-55A
3.10 BOOM HEAD - MOUNTED WINCH
3.10.1 Boom Head-Mounted Winch Removal
1. Using a suitable lifting device, secure the winch
assembly (4) with a nylon strap.
2. Disconnect the hydraulic hoses (5).
3. Loosen and remove the mounting bolts, washers
and nuts (6)(not shown).
4. Lower the winch assembly (4) onto a suitable skid or
table.
3.10.2 Boom Head-Mounted Winch
Installation
1. Using a suitable lifting device, secure the winch
assembly (4) with a nylon strap.
2. Raise the winch assembly (4) into position behind
the boom head.
3. Apply Loctite ® 242 to the previously removed
mounting bolts.
4. Install the mounting bolts, washers and nuts (6)(not
shown). Torque to 200 lb-ft (271 Nm).
5. Connect the hydraulic hoses (5).
3.11 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.
3.11.1 Wear Pad Inspection
Inspect all wear pads for wear. If the angle indicators (1)
on the ends of the wear pads are visible, the wear pads
can be reused. If the pads show uneven wear (front to
back), they should be replaced. Replace pads as a set if
worn or damaged.
3.11.2 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:
• The 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 the 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.
MY3710
6
5
3
4
Ma2070
1 1
MAM1390
4
3
2