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TM 10-4320-343-14
Table 4-2.1. Unit Troubleshooting Table (Model 350 PAFN). (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. INOPERABLE PRESSURE GAUGE (SUCTION OR DISCHARGE)
Check for clogs in sensing lines (item 5, Figure 4-55 and item 5, Figure 4-55.1).
a. Remove debris of lines are clogged.
b. If trouble persists and lines are clear, replace pressure gauge.
10. ENGINE STOPS WHEN OIL PRESSURE BYPASS SWITCH IS RELEASED AFTER STARTUP.
WARNING
Do not smoke or use spark or flame producing equipment while troubleshooting.
Move equipment off line and have a fire extinguisher at hand when troubleshooting
involves electrical circuits.
Failure to heed these warnings may result in death or serious injury of personnel.
Step 1
Test control panel (paragraph 4.13.2.1).
Repair control panel (paragraph 4.13.3 through 4.13.10) if defective.
Step 2
Test system wiring (paragraph 4.12.4.1).
a. Repair or replace system wiring (paragraph 4.12.5.1).
b. If system wiring is not defective, replace pressure switch (paragraph 4.13.6).
Step 3
Start engine and without releasing oil pressure bypass switch, check for voltage at contact 1, TB1 of
control panel.
Replace pressure switch (paragraph 4.10.19) if voltage is not indicated.
4-10.10 Change 1
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