Section III. REPAIR OF LIFT MAST

Section III. REPAIR OF LIFT MAST

(3) Remove carriage assembly by sliding out

4-7. Hydraulic Lift Mast

of mast channel.

a. Description. The hydraulic lift mass, consists of

(4) Remove wear strips (3 and 20)

inner and outer masts with wear plates in the sliding

necessary.

channels to provide maximum ease of movement.

(5) Remove retaining rings (18) and remove

b. Removal. Refer to figure 4-6 and remove as

bearings (17) from inner masts.

follows:

(6) Remove retainer (9) and remove roller(8)

(1) Remove lift forks (TM 10-3930-618-20).

from roller support (7).

(2) Remove hydraulic lift cylinder (para 4-7).

d. Inspection.

(3) Detach tilt cylinders from mast brackets

(1) Inspect mast channels for misalignment,

and remove lift chains (TM 10-3930-618-20).

broken welds, excessive wear, worn or damaged wear

(4) Attach chain hoist to lifting eyes on back of

plates.

outer mast and raise mast assembly enough to take

(2) Inspect bearings for excessive or uneven

weight off pivot pins (34).

wear. Check the pivot bushing (35).

(5) Remove lock wires capscrews (37).

(3) Repair cracks and minor breaks in mast

Remove capscrews, lockwashers (38) and

remove

frames by welding if practical, and provided heat

pivot pins.

distortion is avoided.

(6) Lift mast assembly free of truck.

(4) Replace defective parts.

c. Disassembly.

e. Assembly. Reverse procedures in c above.

(1) Lay mast assembly on suitable support.

f. Installation. Reverse procedures in b above.

(2) Slide inner mast out of outer mast.

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