TM 5-3895-370-14&P
4-108. HUB ASSEMBLY AND DRUM REPLACEMENT (CONT).
b. Cleaning/Inspection.
WARNING
·
Drycleaning solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves;
use only in a well-ventilated area; avoid contact with skin, eyes, and clothes and do not
breathe vapors. Keep away from heat or flame. Never smoke when using solvent; the flash
point for type I drycleaning solvent is 100°F (38°C) and for type II is 140°F (60°C). Failure to do
so may result in injury or death to personnel. P-D-680 type III is a substitute for types I and II
in this application. The flash point for type III is 200°F (93°C).
·
If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts eyes,
immediately flush eyes with water and get immediate medical attention.
(1)
Clean all parts with drycleaning solvent and brush. Dry with rags.
(2)
Turn bearings slowly and inspect bearings for discoloration, pitting, rust, and rough operation.
(3)
Inspect outer race for flat spots, pitting, discoloration, and rust.
(4)
Inspect oil seal for nicks and tears.
(5)
Inspect hub and studs for thread bareness, warpage, and metal fatigue.
(6)
Inspect brake drums for excessive wear. Replace brake drum if not within the following specifications:
Nominal Internal Diameter
12.000 in. (30.480 cm)
Maximum Usable Diameter
12.090 in. (30.709 cm)
Remachining Diameter
12.020 in. (30.531 cm)
Allowable Radial Variance
0.015 in. (0.038 cm)
(7)
Replace all parts failing inspection.
4-290
