TM 9-2330-379-14&P
DETAILED TROUBLESHOOTING - CONTINUED
LOCATION
ITEM
ACTION
3.
Brakes dragging. (Cont.)
4. Chamber neck (3) threaded too deeply into
4.
Readjust threading
plunger housing (4). Chambers are designed to
of chambers into
bottom in the housing.
plunger housing
(page 4-117).
5. Brake shoe return springs (5) not fully return-
5.
Replace spring if
ing. The spring tension on return springs
improper tension
should check out at approximately 75-90 lbs.
or elongation
pull at 9 1/2" inches.
(page 4-105).
6. Leaking air lines (6) or leaking seals.
6.
Repair leaks in air
lines or seals
(page 4-109).
7. Trapped air behind spring brake unit piston in
7.
Repair malfunction
"standard" brake units.
in air release
service lines
(page 4-126).
8. Loose wheel bearings.
8.
Adjust wheel bear-
ings (page 4-149).
4-84
