TM-5-4210-249-13-P-1

TACTICAL FIRE FIGHTING TRUCK (TFF) MODEL M1142

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL WITH REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT REPAIR PARTS AND SPECIAL TOOLS); PART 1 OF 4

TM-5-4210-249-13-P-1 - Page 747 of 1188

TM 5-4210-249-13&P-1

0104-39

DRAFT

0104

TFFT02875

WARNING

ICON 3

Remove rings, wristwatches, neck chains, and any other jewelry before working

around vehicle.

Jewelry can catch on equipment and cause serious injury.

Jewelry

and tools may short across electrical circuits and cause damage to equipment, or

severe burns or electrical shock to personnel.

Step 57.

Connect air line at bumper turret elevation cylinder retract port.

While an assistant

operates bumper turret control joystick to forward position (WP 0004), check for 22 to

28 VDC between bumper turret lower wire (black) at bumper turret junction box 9-pin

terminal strip, terminal 9 and a known good ground.

If 22 to 28 VDC are not present, go to Step 59.

Step 58.

Put bumper turret control POWER switch to

{

(off) position (WP 0004).

Turn battery

disconnect switch to OFF position (WP 0007).

Check connections at bumper turret

junction box 9-pin and 5-pin terminal strips for loose connections.

a.

If connections are loose, tighten loose connections (WP 0573).

b.

If connections are not loose, replace bumper turret lower control

valve (WP 0573).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION