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 23 of 801
TM 9-2320-273-34
Table 2-3. Transmission and Shift Controls Troubleshooting Procedures (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
3.
Step
7.
Check input clutch (fig. 7-1).
Remove, inspect, and repair or replace input clutch (para 7-17).
Step 8.
Check gear group (fig. 7-1).
Repair as required (para 7-1 7).
ENGINE TURNS DRIVE SHAFT IN ALL FORWARD SPEEDS, BUT WILL NOT TURN
DRIVE SHAFT IN ANY REVERSE SPEED.
Step 1.
Check air pressure at REVERSE gage hole on transmission (2, fig. 7-47).
a.
If no pressure is present, repair or replace ratio selector, control line and
gasket (para 7-2).
b.
If pressure is present, go to step 2.
Step 2.
Check gear group.
a.
Inspect reverse shift fork and gearing. Repair as required (para 7-17).
b.
If gearing is not damaged, go to step 3.
Step 3.
Replace transmission control (para 7-17).
TRANSMISSION RATIO CHANGE TOO SLOW AND IS NOT SMOOTH WHEN GEARS SHIFT.
Step 1.
Step 2.
Step 3.
Step 4.
Check pressure regulator output clutch pressure (para 7-8a).
a.
Correct any pressures that are not within tolerances.
b.
If pressures are correct, go to step 2.
Check quick fill valve pressure (para 7-9).
a.
Correct pressure if it is not within tolerances.
b.
If pressure is correct, go to step 3.
Check input clutch and brakes for pressure pulses during shift.
Replace transmission control (para 7-17).
Remove, inspect, and repair or replace rear clutch assembly (para 7-17).
2-7
Back to Top
