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 TM 55-1905-223-24-18-1
Troubleshooting - CONT
Table 2-2.
Malfunction
Test or Inspection
Corrective Action
BOWTHRUSTER/FIRE PUMP CONTROL SYSTEM- CONT
137. No air pressure at inlet (supply port #2) when control lever in neutral
position.
STEP 1. Check to see if air compressor is on.
Turn air compressor on. TM 55-1905-223-10.
STEP 2. Check for defective linear directional control valve (4-way transfer
valve).
Repair/replace linear directional control valve, para. 2-125.
STEP 3. Check for defective air prep system.
Repair/replace air prep system, para. 2-121.
138. Control station does not respond when control lever in bowthruster control
position.
STEP 1. Check for defective roller operated valve.
Replace roller operated valve, para. 2-126.
STEP 2. Check for defective bowthruster cylinder.
Repair/replace bowthruster cylinder, para. 2-126.
STEP 3. Check for defective four-way transfer valve.
Replace four-way transfer valve, para. 2-126.
STEP 4. Defective control station.
Replace control station, para 2-116.
139. RPM's do not increase when control lever in bowthruster control position.
STEP 1. Check for defective governor actuator (throttle actuator).
Replace governor actuator, para. 2-123.
STEP 2. Check for defective bowthruster engine.
Refer to Bowthruster Engine Manual, TM 55-1905-223-24-s.
140. Control station does not respond when control lever in fire pump control
position.
STEP 1. Check for defective roller operated valve.
Replace roller operated valve, para. 2-126.
STEP 2. Check for defective fire pump cylinder.
Repair/replace fire pump cylinder, pare. 2-126.
2-144
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