Lull 6K Service Manual - Manual (Page 393)

Boom and Transfer
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 6-143
1). Install cylinder stop halves (Item 14) on extension cylinder with
two (2) each capscrews (Item 17), lockwashers (Item 18), and
nuts (Item 19). Partially tighten the nuts.
2). Secure cylinder stop to extension cylinder with capscrew
(Item 13), lockwasher (Item 15), and nut (Item 16) Torque nut to
276 in-lbs.
3). Torque the two (2) cylinder stop nuts (Item 19) to 276 in-lbs.
b. For all other models (see View B),
1). Install the cylinder stop (Item 23) on the boom extension
cylinder with a capscrew (Item 20), lockwasher (Item 22), and
nut (Item 21).
2). Torque the cylinder stop nut (Item 21) to 276 in-lbs.
2. Using sling(s), crane, or other suitable means, position the cylinder
(Item 9) in its proper location.
WARNING: To avoid personal and/or equipment damage, make sure the
cylinder is properly supported until it is completely installed.
3. Secure the cylinder to the outer boom section with two (2) each
lockwashers (Item 11) and capscrews (Item 12). Torque the capscrews
to 280 ft-lbs.
4. Reconnect two (2) hydraulic tubes (Item 10) to fittings on extension
cylinder. Torque tube swivel nuts to 79–88 ft-lbs.
5. Extend the cylinder rod until it is in its proper location on the middle
boom section (Item 4).
6. Secure the cylinder to the middle boom section with a washer (Item 1)
and rod nut (Item 2). Torque the rod nut to 1,641 ft-lbs. Secure the nut
with two (2) setscrews (Item 3).
7. Install the cylinder support bracket (Item 8) using two (2) lockwashers
(Item 7) and capscrews (Item 6). Torque the capscrews to 55 ft-lbs.