Carriage and Backrest Assembly - TM-10-3930-624-340106

several times to check for free movement

Note. If an odd number of shims is required, place the

extra shim on the same side of all mast sections and carriage so

throughout the entire range of travel. Readjust

that the mast will be balanced.

hearings if necessary.

(3) Using the outside spanning tool, find the

6-3. Carriage and Backrest Assembly

widest point in the outside width on the web on the

a. Removal.

intermediate mast assembly. Install bearings on the

(1) Remove the forks. Refer to TM 10-3930-

studs at the top inside of the outer mast. Use the

624-12.

inside spanning tool to span bearings at the

(2) Remove the carriage lifting chains.

maximum camber point. Check the clearance

(3) Attach a hoist to the carriage and lift up

between the spanning tools. Add shims as necessary

out of the mast assembly.

to obtain a maximum clearance of 0.015 inch.

b. Disassembly. (fig. 6-2.)

(4) Repeat (2) and (3) to adjust the upper

(1) Remove the backrest from the carriage.

bearings on the inside of the intermediate mast and

(2) Remove the bearings and shims from the

the lower bearings on the inner mast.

carriage.

(5) Raise and lower the mast and carriage

ME 3930-624-34/6-2

Figure 6-2. Carriage and backrest.

(3) Inspect the rollers for distortion and

c. Cleaning, Inspection and Repair.

damage. They must turn freely on the carriage

(1) Clean the carriage and backrest com-

ponents with soap and water and rinse with clean

posts. Replace rollers as necessary.

d. Reassembly. Reassemble the carriage and

wafer. Clean bearings as instructed in paragraph 2-

backrest in the reverse order of disassembly. Adjust

the bearings (subpara f).

(2) Inspect the carriage and backrest for

e. Installation. Install the carriage and backrest

cracked or broken welds, dents, bends, distortion

in the reverse order of removal.

and other damage. Repair by welding if possible or

replace as required.

6-4