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 844 of 1188

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

0109-6

DRAFT

0109

TFFT02692

Step 9.

Open pump operator’s panel housing (WP 0325).

Check discharge valve control wire

harness at NO. 1 DRIVER SIDE DISCHARGE valve control and No. 1 driver side

discharge valve motor for loose connections.

If discharge valve control wire harness connectors are loose, reconnect

loose connectors (WP 0453).

NOTE

•

Engine may have to be running to provide enough power to operate valve control.

Valve

will operate with less voltage, but only yellow indicator light will register on valve control.

•

Do not engage water pump engine during this procedure.

Valve operations can be

checked without water pump operation.

•

Valve motor operation can be checked by noting vibration of valve assembly, or by

observing rotation of 7/16 in. hex at end of valve drive assembly worm gearshaft.

•

Do not remove cap from No. 1 driver side discharge.

Water may be released from system

when valve is operated.

Step 10.

While an assistant pushes pump operator’s panel NO. 1 DRIVER SIDE DISCHARGE

valve control OPEN and CLOSE buttons (WP 0004), check if NO. 1 DRIVER SIDE

DISCHARGE valve control yellow indicator light illuminates and No. 1 driver side

discharge valve motor operates.

If yellow indicator light illuminates and valve motor operates, replace No. 1

driver side discharge valve drive assembly (WP 0388).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION