TM-9-2320-273-20

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE

NOVEMBER 1980

TM-9-2320-273-20 - Page 914 of 1500

TM 9-2320-273-20

Table 9-1. Compressed Air and Brake System Troubleshooting Procedures (Continued).

MALFUNCTION.

TEST OR INSPECTION.

CORRECTIVE ACTION.

19. INTERAXLE DIFFERENTIAL LOCKUP INOPERATIVE:

Disconnect air lines at rear axle; then engage lockup control valve on instrument panel. Check for

air pressure at rear axle. No air indicates clogged lines or defective control valve.

a.

Replace clogged lines.

b.

Replace defective control valve (para 9-44).

c.

If air controls are working normally, refer problem to Direct Support

Maintenance.

9-10