TB 9-2320-360-13&P-1
WAR N I N G
Wear protective goggles and nonleather gloves when servicing A/C or injury may result.
Jewelry can catch on equipment and cause injury or short across electrical circuit and cause severe
burns or electrical shock. Remove rings, bracelets, watches, necklaces, and any other jewelry before
working around HET Tractor.
Always use caution when approaching a hot engine. Failure to follow this warning may cause injury to
personnel.
CONTINUITY TEST
(1) Turn engine switch to OFF position
(TM 9-2320-360-10).
(2) Disconnect A/C compressor receiver/
dryer harness connector from A/C
binary switch.
(3) Set multimeter to ohms setting.
(4) Is there continuity measured across
A/C binary switch terminals?
(a) If continuity is not measured
across terminals, go to Step 22 of
this fault.
(b) If continuity is measured across
A/C binary switch terminals,
1 Recover R-134a (WP 0056 00).
2 Replace A/C compressor
(WP 0045 00).
3 Replace A/C receiver/dryer
(WP 0054 00).
4 Evacuate and charge system
(WP 0056 00).
5 Verify repair, go to Step 23 of
this fault.
PRESSURE TEST
(1) Inspect A/C test set recover/recycling
manifold low side gage reading.
(a) If gage reading does not indicate at
least 34 psi pressure,
1 Check system for damage,
repair damage as required.
2 Check system for loose fittings,
tighten as required.
3 Perform leak test
(WP 0038 00).
4 Recover R-134a (WP 0056 00).
5 Repair any leaks found.
6 Replace receiver/dryer
(WP 0054 00).
7 Evacuate and charge system
(WP 0056 00).
8 Verify repair, go to Step 23 of
this fault.
(b) If gage indicates at least 34 psi
HETF00486
pressure, replace A/C binary
switch (WP 0044 00). Verify repair,
go to Step 23 of this fault.
0042 00-29