TM 9-2330-379-14&P
UNIT TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. ONE OR MORE TAILLIGHTS FAIL TO LIGHT ON 24-VOLT INPUT
Check for defective resistors or wiring in junction box.
Replace defective resistors (page 4-44) and/or replace defective wiring in
junction box.
BRAKES
5. HAND PARKING BRAKE (SPRING BRAKES) WILL NOT HOLD DOLLY SET
Step 1. Check operation of parking brake lever.
a.
Check that parking brake lever (page 2-9) moves freely from side-to-side.
If defective, replace (page 4-90).
b.
If parking brake lever is operating properly, go to step 2.
Step 2. Check parking brake air supply (in emergency air reservoir) and air hoses between
parking brake lever and spring brakes on rear wheels.
a.
If air hoses or parking brake air supply components are defective, replace
hoses and/or components (page 4-126).
b.
If air hoses and parking brake air supply components are not damaged or
leaky, go to step 3.
Step 3. Check for proper operation of spring brake assemblies (page 4-97).
a.
If defective, replace defective spring brake assembly (page 4-97).
b.
If spring brake is operational, refer to page 4-79 for additional brake
system maintenance information.
6. HAND PARKING BRAKE DRAGS
Step 1. Check operation of parking brake lever.
a.
Check that parking brake lever (page 2-9) moves freely from side-to-side.
If defective, replace (page 4-90).
b.
If parking brake lever is operating properly, go to step 2.
4-21
