Lull 944E-42 Service Manual - Manual (Page 68)

Boom
3.20 Model 644E-42/944E-42 Rev. 6/04
b. Intermediate Boom Installation
IMPORTANT: Light lubrication of the boom wear
surfaces with a rust inhibitor/lubricant such as LPS 3 or
equivalent is recommended to keep the boom wear
surfaces lubricated properly. Light lubrication of the
boom wear surfaces is also recommended in salt air
climates, and when the vehicle is stored, to help prevent
rusting.
1. If the intermediate boom is being replaced with a new
intermediate boom, install the items in Step 2 before
proceeding.
2. Coat the capscrews with Loctite
®
242 (blue). Replace
the top wear pads (1), side wear pads (2), bottom
wear pads (3), retainer (4), washers (5) and
capscrews (6) at the back of the intermediate boom
in their previously marked positions. Torque the
retainer capscrews to, 21 - 38 lb-ft (29 - 52 Nm).
Torque top wear pad capscrews to, 33 - 38 lb-ft
(46 - 52 Nm).
Note: The 644E intermediate boom weighs 890 lbs
(400 kg). The 944E intermediate boom, weighs 1,115 lbs
(505 kg).
3. Use a suitable overhead lifting device and sling to raise
the intermediate boom and insert it into the outer
boom. Continually insert the intermediate boom until
it extends approximately 6 inches (150 mm) from the
front of the outer boom.
4. At the rear of the intermediate boom (7), coat the
capscrews with Loctite
®
242 (blue). Install left and
right hose guides (9) into place with weld nuts inside
countersunk hole in bottom of plate and secure with
four capscrews (8). Torque capscrews to,
10 - 19 lb-ft (14 - 26 Nm).
5. At the rear of the intermediate boom (7), coat the
sheave pin (11) with anti-seize compound. Coat the
capscrews with Loctite
®
242 (blue). Install the
sheave (12) into place and insert the sheave pin (11)
and capscrew (10). Torque capscrew to, 36 - 66 lb-ft
(50 - 90 Nm).
WARNING:
Wear protective footwear
with reinforced toe caps and slip-resistant
soles. Failure to comply can result in foot or
other bodily injury from slipping or falling.
WARNING:
NEVER lift a heavy object
without the help of at least one assistant or a
suitable sling and hoist. Failure to comply can
result in death or serious personal injury.
MU1160
4
6
1
2
3
4
5
6
MU4170
7
8
9
MU1220
10
11
12