Lull 944E-42 Service Manual Bedienungsanleitung PDF herunterladen (Seite 52)

Boom

3-22

944E-42

3.5 BOOM WEAR PADS

The wear pads on this machine are flat rectangular wear

pads with metal inserts.

A total of 30 wear pads are installed on the boom

sections.

3.5.1 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.

3.5.2 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.

• Maintain a total boom section clearance (5) of

0.070 - 0.130 in (1,78 - 3,30 mm) both the horizontal

and vertical directions.

• The length of the wear pad bolt depends on the

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

the distance from the face of the insert to the face of

the boom (B) including any spacer, shim(s) and

washer(s).

• Bolt thread engagement in the 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:

M8-1.25 Bolt, 29 lb-ft (39 Nm)

M10-1.5 Bolt, 55 lb-ft (75 Nm)

• Torque wear pad bolts after shimming is completed.

• Lubricate the face and pockets of each wear pad

after being installed.

Boom Section Wear Pad Pathway Lubrication:

• Clean and lightly grease all wear pad pathways with

Mystik Tetrimoly grease.

20. Clean and lightly grease the hose carrier guide bar

pathways with Mystik Tetrimoly grease.

Ma2070

MAM1390

MY5510

MY3620

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