Lull 944E-42 Service Manual User Manual download pdf (Page 55)

100

101

3.7

Model 644E-42/944E-42 Rev. 6/04

Boom

17. Label, disconnect and plug the attachment tilt

hoses (16) at the fittings at the front of the inner

boom section. Cap the fittings on the tilt cylinder to

prevent dirt and debris from entering the hydraulic

system.

18. Label, disconnect and plug the auxiliary hydraulic

hoses (17) at the fittings at the front of the inner

boom section. Cap the bulkhead fittings on the

gooseneck bracket.

Note: If you are replacing the inner boom with a new

inner boom: Remove the female coupler, male nipple

and bulkhead fittings from the bulkhead plate inside the

gooseneck. Also see; Section 3.6.5, “Attachment Tilt

Cylinder Removal,” for Attachment Tilt Cylinder removal.

Note: If the inner boom of your vehicle is equipped with

remote auxiliary hydraulic couplers, remove the

couplers, tubes and mounting plate from the gooseneck.

Transfer the remote couplers to the gooseneck of the

new inner boom.

19. Remove four capscrews holding the hose clamps

(18) to their boom mounts at the rear of the inner

boom.

20. Use a suitable overhead lifting device and sling,

attach to the Extend/Retract Cylinder trunnion (19).

Rotate and pull the Extend/Retract cylinder out of

the inner boom far enough to give the attachment

tilt (21) and auxiliary hydraulic (20) hoses enough

room to be pulled out of the boom.

21. Remove the attachment tilt (21) and auxiliary

hydraulic (20) hoses from the inner boom by pulling

them out from the top of the inner boom. Lay the

hoses behind the vehicle.

22. Completely remove the Extend/Retract cylinder (19).

Readjust the position of the sling as needed to help

balance the cylinder during withdrawal. When the

cylinder is clear of the vehicle, carefully lower it to

the ground.

23. Remove two retaining rings (22) and clevis pin (23)

to disconnect the retract chain yoke (24) from the

rear of the inner boom (25). Lay the chain assembly

flat behind the inner boom.

MU0270

MU0240

MU1210

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Lull 944E-42 Service Manual User Manual Page 55

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