TRANSMISSION-continued -714670042

TM 5-2420-224-34

Table 2-1. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

TRANSMISSION (CONT)

d. Have assistant turn on vehicle MASTER disconnect switch and ignition switch

and depress clutch completely.

e. Move shift collar on shift control either up or down and check for air flow from

port opposite port noted in step c.

If there is air flow, go to step 5.

If there is no air flow, replace air shift valve (page 3-90).

Step 5.

With system air pressure normal (106 PSI), and clutch pedal depressed, check to see

if air supply is present at transmission access cover (intermediate speed shift cover).

If air supply is present, remove transmission access cover (page

3-83) and inspect shift piston for damage. Repair access cover

If air supply is not present, inspect airlines and fittings between air

shift solenoid and access cover for leaks or damage. Repair or

replace as required.

Step 1.

Check for damaged shift controls.

If damaged, replace shift control(s) (page 3-96).

Step 2.

Remove top cover (page 3-86) and inspect for damaged shift forks.

If damaged, repair top cover (page 15-54).

11. TRANSMISSION SLIPS IN ALL RANGES.

Check for worn or damaged clutch.

If worn beyond limits or damaged, replace clutch (page 3-63).

12. CLUTCH SLIPS OR DRAGS.

Step 1.

Check for warped clutch disc or pressure plate.

If warped, replace clutch (page 3-63).

Step 2.

Check for grease or oil on clutch disc facings and for worn clutch facings.

Replace clutch (page 3-63).

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