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TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AUXILIARY POWER UNIT - Continued
5
APU ENGINE LOW POWER
Step
1.
Check air cleaner.
Replace filter and clean housing (see para 4-213).
Step
2.
Check fuel filter and hoses.
Replace filter if dirty. Replace hoses if blocked or kinked (see para 4-210 and 4-211).
Step
3.
Notify Direct Support.
WATER PUMP & PIPING
1
PUMP WILL NOT ENGAGE
Step
1.
Check correct sequence of switching has been carried out (see para 2-13.).
Use proper switching sequence.
Step
2.
Check shift solenoid clicks when pump switch operated.
If no click, see Electrical System troubleshooting.
Step
3.
Notify Direct Support.
2
PUMP ENGAGES BUT WILL NOT ACHIEVE DESIRED WATER PRESSURE
Step
1.
Check relief valve setting.
Adjust or replace relief valve as required (see para 4-35 and 4-36).
Step
2.
Check pump speed.
a. Binding in pump (notify Direct Support).
4-31
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