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TM 5-4210-220-12
Table 4-2 UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3f
APU ENGINE LOW POWER
Step 1
Sample fuel.
Drain tank, change filter and refill with correct fuel.
Step 2
Check air cleaner.
Replace filter and clean housing, (see para. 4-15).
Step 3
Check fuel filter and hoses.
Replace filter if dirty. Replace hoses if blocked or kinked.
Step 4
Check throttle linkage.
Repair/replace faulty part.
Step 5
Check engine adjustments.
Adjust and if necessary, overhaul engine, (see para. 4-15).
4
COMPARTMENT DOOR WILL NOT LATCH
Step 1
Check latch and handle.
Replace failed component.
Step 2
Check hatch holder.
Replace as required.
5a
PUMP WILL NOT ENGAGE
Step 1
Check correct sequence of switching has been carried out
.
Use proper switching sequence.
Step 2
Check manual shutdown valve is closed.
Close manual shutdown valve.
Step 3
Check PTO solenoid clicks when pump switch operated.
If no click, check electrical connections and solenoid. Replace solenoid or wire/connections as
required
4-28
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