TM 10-4320-344-24
Table 2-4. Unit Troubleshooting Table. (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. ENGINE STOPS SUDDENLY. (Continued)
Step 16.
If HIGH temperature light is on, check temperature switch for open
contacts. Using multimeter, check for open between switch terminal and
case ground. (Model 609-C)
Replace engine temperature switch (paragraph 2.21.20).
Step 17.
Remove cowling cover and check for dirt accumulation between fins of
cylinders and in air passages. (Models 609-C and US636HCCD-1)
a .
Clean fins and passages.
b .
If fins and passages are clean, replace engine protection system module
(paragraph 2.16.31). (Model 609-C)
c .
Notify direct support maintenance.
4. ENGINE OIL PRESSURE TOO LOW.
Step 1.
Check oil level.
Refer to LO 10-4320-344-12 and add oil as required.
Step 2.
Remove oil filter and check it for clogging.
Refer to LO 10-4320-344-12 and change oil filter.
Step 3.
Check oil lines or oil drain plug for leakage or damage.
Replace oil line or leaking oil drain plug (paragraph 2.21.2).
Step 4.
Check oil cooler for leakage or damage.
Replace leaking oil cooler (paragraph 2.21.28/2.21.29/2.21.30).
Step 5.
Check oil pressure line to oil pressure gauge for leakage or damage.
(Models 609-A and US636HCCD-1 only).
Replace oil pressure line (paragraph 2.16.10).
Step 6.
Check oil pressure switch for damage.
(Model 609-C only)
Replace oil pressure switch (paragraph 2.21.20).
Step 7.
Check oil pressure gauge for damage.
Replace oil pressure gauge (paragraph 2.16.10/2.16.12).
Notify direct support maintenance.
5. AMMETER READING TOO LOW.
Step 1.
Check alternator belt for proper tension or damage.
a .
Adjust alternator belt tension (paragraph 2.21.13).
b .
Replace damaged alternator belt (paragraph 2.21.13).
Step 2.
Check for loose or dirty wire connections at alternator.
Clean and tighten loose wire connections.
2-34
a .
b .
