Lull 944E-42, Service Manual

Page: 68 / 844

Boom
3.22 Model 644E-42/944E-42 Rev. 6/04
3.3.3 Outer Boom Replacement
a. Outer Boom Removal
1. Remove both the inner boom and intermediate
boom as described in Section 3.3.1, a. “Inner Boom
Removal,” and Section 3.3.2, a. “Intermediate Boom
Removal.”
2. At the front of the outer boom (1) remove the
locknut (2) and washer (3) securing the retract
chain (4) to the boom.
3. Label, disconnect and plug the attachment tilt (5),
and auxiliary hydraulic (6) hoses. Cap the fittings on
the boom tubes.
4. Remove all clamps (7) securing the attachment
tilt (8) and auxiliary hydraulic tubes (9) and rear
hydraulic hoses (10) to the outer boom and frame.
Label and remove the tubes. Cap hose ends.
5. Pull the hydraulic hoses out of the Outer boom.
Label the hoses for later installation.
6. Loosen the inside boom proximity sensor ring nut
(11) and then unscrew the outer ring nut (12) to
remove proximity sensor (13) from outer boom.
Note: The 644E outer boom weighs 1,800 lbs (800 kg).
The 944E outer boom weighs 1,910 lbs (865 kg).
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.
MU1410
1
2
3
4
MU0280
5
6
MU0340
7
8
9
10
MU1290
11
12
13