FIELD MAINTENANCE
PARKING BRAKE(S) ON ONE AXLE DO NOT APPLY OR APPLY SLOWLY
INITIAL SETUP:
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(WP
0194, Table 1, Item 47)
Materials/Parts
Pin, Cotter (WP
0195, Table 1, Item 75)
Pin, Cotter (WP
0195, Table 1, Item 16)
Personnel Required
Wheeled Vehicle Mechanic (2)
References
WP
0066
References (cont.)
WP
0067
WP
0071
WP
0072
WP
0078
WP
0092
Equipment Condition
Parking brake applied (TM 9-2330-342-10).
(WP
0190)
Wheels chocked (TM 9-2330-342-10). (WP
0190)
Emergency air supply gladhand connected to
vehicle (TM 9-2330-342-10). (WP
0190)
TROUBLESHOOTING PROCEDURE
PARKING BRAKE(S) ON ONE AXLE DO NOT APPLY OR APPLY SLOWLY
STEP 1
Are air lines and fittings free of crimps?
NOTE
•
Trailer air system pressure must be 125 ± 5 psi (861 ± 34 kPa) to begin
troubleshooting the brake system. If the air system pressure cannot be maintained,
refer to the Air System Troubleshooting.
•
Air lines and valves listed in this troubleshooting procedure are illustrated and located
in Air System Schematic.
1.
Inspect air lines listed in table and fittings for crimps.
Table
1.
Parking Brake Air Lines.
Axle No. 1
Axle No. 2
Axle No. 3
Air Hose No.
Air Hose No.
Air Hose No.
LH 2032
LH 2142
LH 2141
RH 2022
LH 2139
RH 2140
RH 2138
RH 2143
TM 9-2330-342-23&P
0035
0035-1