CLEANING AND INSPECTION - TM-10-3930-607-150211

UPRIGHTS

NOTE:

Do not match mark the right rear Iatch and shaft. It

is not necessary, and in doing so, confusion

between front and rear latch may be caused.

15. Pull the inner upright out of the top of the outer

upright, only if necessary.

D. CLEANING AND INSPECTION

1. All parts except the bearings may be steam

cleaned or cleaned with solvent.

Check all sliding surfaces for roughness.

Remove slight imperfections with sandpaper. If defects

cannot be removed, replace the defective unit.

3. All welds should be carefully checked for cracks,

Figure 13.

especially around the stub shafts and hangers. Repair

as necessary.

10. Unscrew the crosshead stop screws from the

bottom of the crosshead guide rails.

Slide the

4. Inspect the strip bearings for wear. Replace the

crosshead out the bottom of the rails. Remove the snap

bearings, when the small indentations are nearly gone.

ring retaining each chain sheave. Pull the sheaves from

If the O-rings will no longer retain the bearing strip,

the crosshead shafts,

replace with new rings.

11. Remove the snap rings and pull the upper chain

5. Check the fit of each latch shaft in the respective

sheaves from the shafts on the box.

bushing. The latch should rotate without binding, Some

side play is permissible as long as the latch function is

12.

Unscrew the capscrews and remove the

not hindered.

lockwashers and retaining plates securing the chain

sheaves to an intermediate crossmember of the inner

6. Inspect roller surfaces and contacting surfaces

upright. Pull each sheave from its respective shaft.

for galling, unevenness and indications of sticking or

stuck rollers. A defective roller is sometimes detected

13. Remove the snap rings from each side of the

by long rough grooves or gouges on the rolling surfaces

bearings in the sheaves that need new bearings. Press

of the adjacent upright.

out the defective bearings.

NOTE:

7. Make sure that all ground finishes, such as tilt

Do not remove the latches unless they are

cylinder rods, are free of rust, pits and nicks. In most

defective, loose on the shafts, or the shafts

cases, if these conditions exist, they can be dressed to a

and bushings are worn.

smooth finish with fine emery cloth or sand paper. Wipe

clean and lubricate with light oil.

14. Match mark the front latch and shaft. Remove

the spring an pin. Punch the shaft out r)of the latch,

with a soft drift punch. Remove the remaining rear latch

in the same manner.

B-175