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 576 of 1188

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

0094-30

DRAFT

0094

TFFT03738

NOTE

Air pressure is checked by disconnecting air lines at eductor valve and observing air

pressure escaping from air line, when eductor control valve is activated.

Air will escape

from the blue air line when FOAM SYSTEM switch is positioned to ON position and

escape from red air line when FOAM SYSTEM switch is positioned to OFF position.

System air pressure may drop below 85 psi (586 kPa) during this procedure.

Step 36.

Disconnect red and blue air lines from eductor valve.

While an assistant puts cab or

pump operator’s panel FOAM SYSTEM switch to ON and OFF position (WP 0004),

check if air pressure is present at eductor valve.

If there is air pressure, replace eductor valve (WP 0287).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION