Lull 944E-42 Service Manual - Manual (Page 66)

Boom
3.18 Model 644E-42/944E-42 Rev. 6/04
3.3.2 Intermediate Boom Replacement
a. Intermediate Boom Removal
1. Remove the inner boom as described in Section
3.3.1, “Inner Boom Replacement.”
Note: The 644E intermediate boom weighs 890 lbs
(400 kg). The 944E intermediate boom, weighs 1,115 lbs
(505 kg).
Note: The intermediate booms center of gravity is at
about 9 feet (3 m) in from the top front of the boom.
2. At the front of the outer boom, remove the
capscrews (1) and flat washers (2) holding the top
wear pads (3), side wear pads (4) and shims (5).
Label the wear pads and shims positions for later
replacement. Save the shims, capscrews and
washers.
3. At the rear of the boom, remove the capscrew (6),
sheave pin (7) and sheave (8).
4. Use a suitable overhead lifting device and slings to lift
and withdraw the intermediate boom from the outer
boom until you can gain access to the outer boom
bottom front wear pads.
5. At the front of the outer boom, remove the
capscrews (9) and flat washers (10) securing the
bottom wear pads (11) and shims (12). Label the
wear pads and shims positions for later replacement.
Save the shims, capscrews and washers.
6. Reposition the sling and continue withdrawing the
boom until it clears the vehicle.
7. Carefully lower the intermediate boom onto suitable
supports, or to the ground.
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.
MU1170
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1
MU1220
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MU1190
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