TM 10-4130-237-14
5-8.
REFRIGERATION SYSTEM PRESSURE TEST (CONT)
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NOTE
If testing pressure to check high or low pressure switch, engine must be off
for at least 30 minutes before restarting.
Remove caps from two compressor service ports.
C1ose two manifold valves.
NOTE
Hose on compound gage side of manifold is suction hose. Hose on high pres-
sure gage side of manifold is discharge hose.
Connect manifold discharge hose to D (discharge) service port.
Connect manifold suction hose to S (suction) service port.
Open manifold valves.
Start engine and run for at least 10 minutes while observing gages.
High pressure gage should show less than 295 psi (2034 kPa) and low pressure gage should show more
than 35 psi (241 kPa).
If high pressure gage shows more than 295 psi (2034 kPa) check condenser for blockage, or refrigera-
tion line or hose for bend or kink.
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