Section V. MAST 7-14. Description

TM 10-3930-631-34

b. Inspection.

c. Installation. Refer to figure 7-18 and install

(1) Inspect all hoses for damage and deterio-

side shift hoses on fork lift truck.

ration. Replace unserviceable hoses.

7-12. Hose Reel

(2) Inspect hoses and fittings for evidence of

Paragraph 7-12 has been rescinded. See TM 10-3930-

leakage.

631-12.

(3) Inspect bracket for damage.

Replace

7-13. Swivel Block

bracket by welding if unserviceable.

Paragraph 7-13 has been rescinded. See TM 10-3930-

(4) Inspect hose guards for damage, evidence

631-12.

of pinching hose, and wear. Replace unserviceable hose

guards.

Section V. MAST 7-14. Description

a. The mast contains three sections: an inner mast,

(b) Check to see that inner mast bearing clears

notch in intermediate mast upper channel. If both

intermediate mast, and outer mast. The inner mast

bearings are clear, remove inner mast from in-

moves within the intermediate mast channels and is

termediate mast.

guided by bearings at the top of the intermediate mast

(2) Attach hoist to intermediate mast and

and bottom of the inner mast. Bearings in the outer mast

carefully lift intermediate mast (48) from outer mast.

channels and at the bottom of the intermediate mast

(3) Disconnect tilt cylinders from outer mast.

guide the intermediate mast. The outer mast is attached

Attach a suitable hoist to outer mast (50) and remove

to the front of the frame.

b. The masts and carriage are raised by hydraulic

mounting pins securing outer mast to frame. Carefully

lift mast from truck frame.

cylinders. An interlock assembly, mounted on the inner

b. Disassembly.

mast, locks all three sections in the lowered position.

(1) Disconnect spring (6, fig. 7-11) from in-

When the carriage and forks rise to the top of the free lift

terlock lever and screws (7). Remove screw (8) and

through lift chain action, the interlock is engaged by the

spacer (9) and remove interlock lever (10) from inner

carriage stop screw. The interlock lever is moved out of

mast.

engagement with the mast, allowing the telescoping

(2) Remove bearings (41) and record number

masts to rise.

and remove shims (42 and 43) from masts using a

7-15. Mast Assembly

bearing puller. Remove screw (44) and remove stud

a. Removal. Refer to paragraph 2-15 and remove

(45) from outer mast.

the mast assembly as a unit. If desired the mast

(3) Remove setscrews (25) and remove wash-

sections can be removed while mounted on the truck.

ers (27) and bearing (28) from crosshead (29).

Refer to paragraph 7-7 and remove the hoist cylinders.

(4) Remove screw (1) and lockwasher (2) and

Refer to paragraph 7-11 and TM 10-3930-631-12 and

remove guard (3) from intermediate mast.

disconnect side shift hoses and remove reel and swivel

c. Cleaning, Inspection and Repair.

block.

(1) Attach a suitable hoist to inner mast (46, fig.

WARNING

7-11). Trip interlock lever (10) and hold lever away from

mast. Carefully lift inner mast from inter- mediate mast.

Cleaning compound, solvent (Fed. Spec. P-D-

(a) Slowly raise inner mast until notch at bottom

680), used for cleaning, is potentially dangerous

of inner mast clears the intermediate mast up- per

to personnel and property. Do not use near

bearing.

open flame. Flash point of solvent is 100F to

138F (38C to 590C).

(1) Clean all parts in cleaning compound, sol-

vent (Fed. Spec. P-D-680) and dry thoroughly.

Pages 7-29 and 7-30 rescinded.

Change 1 7-28