TM 9-2330-379-14&P
DETAILED TROUBLESHOOTING - CONTINUED
LOCATION
ITEM
ACTION
2.
Parking brake (spring brake) not holding.
1. Spring brake power spring (1) broken or
1.
Replace spring
partially caged, resulting in a partially
brake chamber
applied spring braking force.
(page 4-95).
2. Hold-off air not fully releasing because the air
2.
Clean air lines and/
lines may be plugged or the relay valve may be
or replace relay
malfunctioning.
valve (page 4-126).
3. Caging bolt (2) damaged. (Caging bolt should
3.
Replace spring
turn freely approximately 18 to 22 turns in
brake unit (page
either direction.)
4-119).
4. Brakes not properly adjusted.
4.
Adjust brakes
(page 4-119).
4-82
