CAB TILT HYDRAULIC SYSTEM TROUBLESHOOTING

TM 9-2320-285-24-1

2-77. CAB TILT HYDRAULIC SYSTEM TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. CAB WON'T RAISE TO 45 DEGREES

Step 1.

Check cab tilt hydraulic pump fluid level.

a. If fluid level is low, fill (para 2-79a).

b. If fluid level is correct, go to step 2 below.

Step 2.

Check cab tilt hydraulic system lines and fittings for visible signs of fluid leaks.

a. If leaks are found, repair as necessary (para 2-79b).

b. If no leaks are found, notify direct support maintenance.

2. CAB WON'T LOWER OR STOPS PART WAY DOWN

Raise cab slightly, then try to lower cab slowly.

a. If cab lowers, cab tilt hydraulic pump velocity fuse had set (cab was lowered too quickly);

alternately raise and lower cab to verify proper cab tilt hydraulic system operation. Then return

vehicle to normal operation.

b. If cab does not lower, notify direct support maintenance.

3. HYDRAULIC LATCHES LOCK BEFORE CAB IS ALL THE WAY DOWN

Raise cab enough to allow latch to open fully.

a. If latch opens fully, lower cab.

b. If latch does not open fully, notify direct support maintenance.

4. HYDRAULIC LATCHES WON'T LOCK

Check if latches are correctly mounted.

If latches are not correctly mounted, reinstall latches (notify direct support maintenance).

2-867