Lull 944E-42 Service Manual - Manual (Page 60)

Boom
3.12 Model 644E-42/944E-42 Rev. 6/04
Note: The 644E inner boom, without attachments,
weighs 1,050 lbs (480 kg). The 944E inner boom, with-
out attachments, weighs 1,250 lbs (565 kg).
5. Use a suitable overhead lifting device and sling to
raise the inner boom and begin inserting it into the
intermediate boom at the front of the vehicle.
6. Install lower wear pads (1) at the front of the
intermediate boom. Coat the wear pad capscrews (2)
with Loctite
®
242 (blue). Use the capscrews (2) and
washers (3) to secure the wear pads and shims to
the front of the intermediate boom. Torque
capscrews (2) to, 34 - 38 lb-ft (46 - 52 Nm).
7. Slide the inner boom (4) into the intermediate boom (5)
until the rear of the gooseneck weldment (6), on the
inner boom, contacts the front of the intermediate
boom. Remove the sling and hoist.
8. Coat clevis pin (9) with anti-seize compound. Attach
the extend chain yoke (7) to the inner boom (8) with
the clevis pin (9) and two retaining rings (10).
9. From the rear of the boom, push the attachment
tilt (11) and auxiliary hydraulic hoses (12) through
the inner boom along the hose guides. Leave
enough hose out of the back of the inner boom for
the Extend/Retract cylinder to be installed.
10. Use a suitable overhead lifting device and sling to
carefully raise and position the Extend/Retract
cylinder (13) into the rear of the inner boom.
Readjust the sling as needed to help balance the
cylinder in the sling during installation.
11. After the manifold clears the hoses and is inside the
inner boom, push the attachment tilt and auxiliary
hydraulic hoses the rest of the way into the inner
boom.
MU1010
1
2
3
MU0300
4
5 6
MU1210
10
7
8 9
10
MU0240
11 12
13