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 235 of 1188

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

0042-3

DRAFT

0042

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Do not let pressure exceed 125 psi (862 kPa).

Failure to comply may result in injury

or death to personnel or damage to equipment.

NOTE

If pressure exceeds 125 psi (862 kPa) notify Supervisor.

7.

Start water pump engine (WP 0022).

8.

Open supply valve on positive water source.

9.

Prime water pump (WP 0023).

10. Set pressure governor (WP 0024).

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CAUTION

Cavitation can occur when pumping and air enters water.

If engine speed increases

without an increase in pressure, pump may be cavitating.

Even though pump may

be primed, air leaks can cause rough operation and an increase in engine speed

without an increase in pressure or flow.

If an air leak is suspected, discontinue

pumping and isolate problem.

Cavitation can also occur with large nozzle tips.

Solve this problem by reducing flow.

Failure to comply may result in damage to

water pump.

11. Remove cap (8) from NO. 1 DRIVER SIDE DISCHARGE (9).

WARNING

ICON 72

TFFT2212