Lull 6K Service Manual - Manual (Page 320)

Boom and Transfer
6-70 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
8. Place sling around inner boom section, at the front. Chains with hooks
may be attached to the rear of the outer boom section, near the pivot
pin bosses (Ref. Fig. 6-69). Attach sling and chains to crane hook and
lift crane to support weight of boom.
CAUTION: Make sure crane, slings, and chains have sufficient capacity to
support the weight of the boom. A 2-section boom assembly
weighs approximately 4,200 pounds.
Fig. 6-69: Cylinder Pivot Pins
9. (Ref. Fig. 6-69) Remove four (4) capscrews (Item 3) and lockwashers
(Item 2) from lock pins (Item 1) securing rear carriage tilt cylinders
(Item 6) and boom hoist cylinders (Item 7) to the boom (Item 8).
Remove four (4) lock pins from pivot pins (Items 4 and 5).
CAUTION: Make sure each cylinder is fully supported so it does not fall
and cause personal or equipment damage when it is being
removed.
10. (Ref. Fig. 6-69) Starting at a rear carriage tilt cylinder (Item 6), use a
slide hammer puller threaded into the pivot pin (Item 4) to remove the
pin from the boom. After the pivot pin has been removed, allow the
cylinder to swing down and away from the boom.
J1072
3
1
2
3
4
2
1
5
6
7
8
Hook chains at
these areas
# Description
1 Lock Pin
2 Lockwasher
3 Capscrew
4 Pivot Pin, Rear Carriage Tilt Cyl.
# Description
5 Pivot Pin, Boom Hoist Cylinder
6 Rear Carriage Tilt Cylinder
7 Boom Hoist Cylinder
8 Boom