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 896 of 1188

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

0112-10

DRAFT

0112

TFFT02678

Step 9.

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

Check No. 4 passenger side

discharge valve control wire harness at NO. 4 PASSENGER SIDE DISCHARGE valve

control and No. 4 passenger side discharge valve motor for loose connections.

If No. 4 passenger side 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. 4 PASSENGER SIDE DISCHARGE.

Water may be

released from system when valve is operated.

Step 10.

While an assistant pushes pump operator’s panel NO. 4 PASSENGER SIDE

DISCHARGE valve control OPEN and CLOSE buttons (WP 0004), check if NO. 4

PASSENGER SIDE DISCHARGE valve control yellow indicator illuminates and No. 4

passenger side discharge valve motor operates.

If indicator illuminates and valve motor operates, replace No. 4 passenger

side discharge valve drive assembly (WP 0388).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION