TB 9-2320-360-13&P-1
WAR N I N G
Always use caution when approaching a hot engine. Failure to do so may result in serious burns.
Wear protective goggles and nonleather gloves when servicing A/C or injury may result.
Pressure Temperature Chart
F
C
HFC-134a (psi)
F
C
HFC-134a (psi)
0
-17.8
6.5
85
29.4
94.9
5
-15.0
9.0
90
32.2
103.9
10
-12.2
12.0
95
35.0
113.5
15
-9.4
15.0
100
37.8
123.6
20
-6.7
18.4
105
40.6
134.3
25
-3.9
22.1
110
43.3
145.3
30
-1.1
26.1
115
46.1
157.6
35
1.7
30.4
120
48.9
170.3
40
4.4
35.0
125
51.7
183.6
45
7.2
40.0
130
54.4
197.6
50
10.0
45.3
135
57.2
212.4
55
12.8
51.1
140
60.0
227.9
60
15.6
57.3
145
62.8
244.3
65
18.3
63.9
150
65.6
261.4
70
21.1
70.9
155
68.3
279.5
75
23.8
78.4
160
71.1
298.4
80
26.7
88.4
165
73.9
318.3
N OT E
System low side pressure is determined by the temperature of the R-134a refrigerant at the low side
service valve.
System high side pressure is determined by the ambient temperature of the air surrounding the A/C
condenser. The ambient temperature is determined by measuring the temperature 2 in. in front of the
PRESSURE TEST
(1) Inspect A/C test set recover/recycling
manifold low side gage reading.
(a) If gage reading is not within the
range indicated in the chart shown
above, for normal low side
pressure (approximately 23 to 30
psi), go to Step 9 of this fault.
(b) If gage reading is within the range
indicated in the chart shown
above, for normal low side
pressure, (approximately 23 to 30
psi), go to Step 5 of this fault.
HETF00477
0042 00-9