TM 5-2420-231-23-1
0030
Table 1. Heating and A/C Troubleshooting Procedures - Continued.
030
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. A/C Does Not Blow Cold
10. Verify that cab high-pressure A/C
High-Pressure A/C Hose Not
Air When A/C
hose (Figure 25, Item 7) is not
Restricted - Install new O-ring (Figure
Temperature Control Is
restricted.
25, Item 8) on high-pressure A/C hose
Set to Maximum Cold -
(Figure 25, Item 7), and connect hose
Continued
to cab high-pressure A/C tube (Figure
25, Item 7) (WP 0361).
A/C expansion valve is not opening.
Replace A/C expansion valve (WP
0358).
Install floor cover plate (WP 0306).
Proceed to Test Step 9.
High-Pressure Hose Remains
Restricted - Replace cab A/C high-
pressure hose (WP 0361).
Install new butyl tape on A/C
thermostatic expansion valve.
Proceed to Test Step 9.
Figure 25. Cab A/C High-Pressure Line.
0030