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 795 of 1188

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

0106-5

DRAFT

0106

Step 5.

Turn battery disconnect switch to OFF position (WP 0007).

Open pump house panel A

(WP 0539).

Remove driver main inlet valve (WP 0484) and inspect it for binding,

damage, and contamination.

a.

If driver main inlet valve is free from binding, damage, and

contamination, reinstall valve (WP 0484) and replace driver main inlet

valve motor and drive assembly (WP 0388).

b.

If driver main inlet valve is not free from binding, damage, or

contamination, repair (WP 0387) or replace driver main inlet valve

(WP 0484).

TFFT03420

NOTE

Valve operations must be checked by observing rotation of 7/16 in. hex at end of valve

drive assembly worm gearshaft for Step 6.

Step 6.

While an assistant pushes pump operator’s panel DRIVER MAIN INLET valve control

OPEN and CLOSE buttons (WP 0004), check if driver main inlet valve worm gearshaft

moves after valve is fully opened or closed.

If driver main inlet valve worm gearshaft moves excessively after valve is

fully opened or closed, remove and reinstall driver main inlet valve motor

(WP 0388), ensuring all mounting hardware is secure.

Step 7.

Remove pump house panel B (WP 0540).

Remove driver main inlet valve (WP 0484)

and inspect it for damage and contamination.

a.

If driver main inlet valve is free from damage and contamination,

reinstall valve (WP 0484) and go to Step 8.

b.

If driver main inlet valve is damaged and/or contaminated,

repair (WP 0387) or replace driver main inlet valve (WP 0484).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION