CLEANING AND INSPECTION - TM-10-3930-607-150166

BRAKES

with each other before applying pressure to the units. If

2. Unscrew tile nuts retaining the wheel and with )

tire is pressed on over the closed end of the drum, it will

soft-faced hammer rap the wheel to loosen the tapered

be loose and work off the drum during operation.

dowels. (Fig. 3) Remove the dowels.

4. Remove the two shoe retaining caps and

springs and brake return springs. (Fig. 5) Use clamp or

wrap wire around both ends of the wheel cylinder to

keep wheel cylinder pistons in place.

Figure 3.

3. Pull the wheel from the truck. (Fig. 4) Inspect

the surface of the drum for badly worn areas, and, if

resurfacing is necessary, this should be performed

before assembly.

Figure 5.

C. CLEANING AND INSPECTION

1. Use solvent to clean all metal parts, except the

brake shoe assemblies. The shoe rib and table can be

wiped with solvent dampened cloth. No solvent should

get on the lining. Since solvent may not readily remove

brake fluid residue, use denatured alcohol for this

purpose.

2. The wheel cylinder should be overhauled

whenever brake linings are replaced. Refer to the

Wheel Cylinder Section.

3. Examine drums for cracks, heat checks, and

deep grooves. The drums should not be bell-mouthed

Figure 4.

or barrel-shaped nor should the mounting holes be

elongated. If any of these exist, the drums should be

NOTE: The old tire can be pressed from the wheel and

replaced. Glaze on drums, otherwise in good

used on a new hub, or a new tire can be pressed onto

the old hub. The drum has a slight taper near the open

end to facilitate tire replacement, Place the tire on the

tapered end making sure the tire and drum are square

B -130