TM 55-2210-223-34
TO 45A2-2-14-22
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIRBRAKE SYSTEM
1.
AIR PRESSURE DOES NOT BUILD UP.
Step 1. Check to see if main reservoir cutout cock is open.
Close cutout cock.
Step 2. Check to see if the main reservoir drain valve is open.
Close main reservoir drain valve.
Step 3. Check to see if train line angle cock is open.
Close train line angle cock.
Step 4. Check to see if the unloader valve is stuck open.
Disassemble and clean unloader valve (para 4-8).
Step 5. Check to see if main reservoir safety valve is stuck open.
Replace or rebuild safety valve (para 4-8).
Step 6. Check to see-if the air compressor governor is stuck open.
Disassemble and clean governor (para 4-34).
Step 7. Check to see if high or low air pressure discharge and suction valves are stuck open.
Replace or rebuild valve (para 4-8).
2.
AIR PRESSURE BUILDS UP SLOWLY.
Step 1. Check to see if fittings are loose.
Locate and tighten loose fittings.
Step 2. Check to see if any cocks are partially open.
Close all cocks fully.
Step 3. Check to see if the air compressor unloader valve or compressor-head valve is leaking slightly.
Disassemble and clean unloader valve or compressor-head valve (para 4-8).
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