TM 5-2420-230-24-1
Table 3-6. Unit Troubleshooting Table. -- Continued
Malfunction
Test or Inspection
Corrective Action
14.
TRANSMISSION WILL NOT SHIFT INTO 2WD/4WD.
NOTE
To perform this troubleshooting, the ignition switch must be in the IGN position, the EGS must be in
the N (Neutral) position, and the air system must be fully pressurized.
Step 1.
Check 2WD/4WD shift cylinder (1) for bent control rod.
If control rod on 2WD/4WD shift cylinder (1) is bent, replace control rod (Para 4-17).
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive
electrical circuits, a direct short may result. Damage to equipment and injury or death to personnel
may occur.
Step 2.
Remove engine access panel (TM 5-2420-230-10).
Step 3.
Check DRIVE MODE switch (2) for proper operation and ensure LED indicator (2.1) illuminates.
If DRIVE MODE switch (2) is not operating properly, replace DRIVE MODE switch (Para 12-14).
If LED indicator (2.1) does not illuminate, replace valve island (Para 12-34.1).
Change 1