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 829 of 1188

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

0108-9

DRAFT

0108

TFFT03855

Step 9.

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

Check driver side pre-connect B

valve control wire harness at DRIVER SIDE PRE-CONNECT B valve control and driver

side pre-connect B valve motor for loose connections.

If driver side pre-connect B 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 hose from DRIVER SIDE PRE-CONNECT B.

Water may be released from

system when valve is operated.

Step 10.

While an assistant pushes pump operator’s panel DRIVER SIDE PRE-CONNECT B

valve control OPEN and CLOSE buttons (WP 0004), check if DRIVER SIDE

PRE-CONNECT B valve control yellow indicator illuminates and driver side

pre-connect B valve motor operates.

If indicator illuminates and valve motor operates, replace driver side

pre-connect B valve drive assembly (WP 0388).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION