LEFT OR RIGHT WINDSHIELD WIPER DOES NOT WORK.

9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

TROUBLESHOOTING INSTRUCTIONS (CONT).

12-15.

Table 2-9. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

AIR SYSTEM (CONT)

CHECK VALVE FAILS TO RELEASE SYSTEM PRESSURE AT 150 PSI (1 034 kPa).

Step 1. Replace check valve (para 11-23) and adjust governor (para 11-36).

If governor cannot be adjusted replace governor (para 11-37),

9. AIR SYSTEM PRESSURE BUILDS UP TO MORE THAN 130 PSI (896 kPa).

Step 1. Check for governor out of adjustment (para 11-36).

If governor is out of adjustment, adjust governor (para 11-36).

If governor cannot be adjusted, replace governor (para 11-37).

10. LEFT OR RIGHT WINDSHIELD WIPER DOES NOT WORK.

NOTE

Wipers will not operate unless air pressure is above 60 to 70 psi (414 to 483 kPa).

Step 1. Check cab air supply at pressure protection valve inlet port.

Pressure protection valve opens to supply air out at 60 to 70 psi (414 to 483 kPa).

If pressure protection valve does not open, replace defective pressure protection

valve (para 11-16).

Step 2. Check for leaking or defective airhoses.

Tighten loose connections or repair damaged airhoses.