TM-9-2320-273-34
TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1980
TM-9-2320-273-34 - Page 22 of 801
TM 9-2320-273-34
Table 2-3. Transmission. and Shift Controls Troubleshooting Procedures
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
NOTE
All transmission test and disassemble y
procedures are provided in chapter 7.
See figures 7-51 and 7-55 for location
of test ports specified in this table. For
parts replacement, refer to applicable
portion of ratio selector disassembly
and assembly procedures (para 7-3 and
7-5); or case disassemble y and assembly
procedures (para 7-17 and 7-19).
ENGINE DOES NOT TURN DRIVE SHAFT IN ANY SPEED, FORWARD OR REVERSE.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Check to see if transmission charging valve on ratio selector is pushed in (open).
Push valve in.
Check to see if air pressure is going to transmission.
Troubleshoot vehicle compressed air system.
Check umbilical cord and connections for air leaks.
Replace or repair leaks at connection.
Check oil pressure (para 7-10).
a. Check oil level and condition.
b. Check oil pump and screen,
c.
Replace oil pump (para 7-17).
Check output clutch pressure (para 7-8a).
a.
If output clutch has pressure, remove and repair or replace output clutch
assembly (para 7-17).
b. If output clutch has no pressure, go to step 6.
Check for air pressure to ratio selector.
a.
Loosen umbilical cord connection at transmission end.
b. If air pressure is present, repair or replace ratio selector (para 7-2).
c.
If no air pressure is present, replace transmission control (para 7-17).
d. Replace umbilical cord gasket at transmission end and tighten umbilical cord.
2-6
Back to Top
