TM 5-3805-261-20BRAKE TROUBLESHOOTING AND MAINTENANCE PROCEDURES. (cont)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONg.DIFFERENTIAL LOCK NOT ENGAGING CORRECTLY.Step 1. Check the control valve.If the control valve is worn, damaged or defective--contact Direct Support.Step 2. Check the differential lock valve.If the lock valve is worn, damaged or defective--contact Direct Support.Step 3. Check the differential lock.If the lock is damaged or defective--contact Direct Support.Step 4. Check Number Six clutch oil passage to differential lock control.If the oil passage is restricted or damaged--contact Direct Support.9-6
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