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 TM 55-1905-223-24-6
Section IV. UNIT MAINTENANCE TROUBLESHOOTING
2-9.
Troubleshooting. Both a symptom index and a troubleshooting table are provided. The symptom
index will help you locate the information you need for troubleshooting.
SYMPTOM INDEX
Troubleshooting
Procedure
BOWTHRUSTER
Not operating
Item 1
Not steerable
Item 2
SIGHT GAUGE/THERMOMETER
Reading exceeds 150oF
Item 3
VIBRATION/NOISE
Excessive
Item 4
HYDRAULIC OIL
Frothy
Item 5
Table 2-2 lists the common fault conditions that may be found during operation or maintenance of the
equipment. Look for causes and do corrective actions in the order listed. This manual cannot list every symptom
that may showup, and it cannot list all the possible causes and corrective actions. If a symptom is not listed,
or if it keeps up after you have performed the corrective actions, notify your supervisor.
Table 2-2. Troubleshooting
Malfunction
Test or Inspection
Corrective Action
1. Bowthruster not operating.
STEP 1. Check bowthruster engine operating and driveshaft engaged and turning.
Refer to TM 55-1905-223-24-5 for starting procedures.
STEP 2. Check power to Pilothouse Control panel.
a. Check circuit breaker ON at EP 102.
b. Refer to TM 55-1905-223-24-18 for repair of Control Panel.
2. Bowthruster operating - not steerable.
STEP 1. Check air pressure to Control Panel.
Refer to TM 55-1905-223-24-18 for repair of Control Panel.
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