TM-9-2320-328-13-P-1

HEMTT-BASED WATER TENDER (HEWATT)

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST); PART 1 OF 3

MARCH 2009

TM-9-2320-328-13-P-1 - Page 445 of 1318

TM 9-2320-328-13&P-1

0061-5

DRAFT

0061

HWT0512

WARNING

ICON 3

Remove rings, wristwatches, neck chains, and any other jewelry before working

around vehicle.

Jewelry can catch on equipment and cause serious injury.

Jewelry

and tools may short across electrical circuits and cause damage to equipment, or

severe burns or electrical shock to personnel.

Step 6.

Put FOAM SYSTEM switch to OFF position (WP 0004).

Disconnect diode pack from

pump house wire harness (WP 0269).

Put pump operator’s panel FOAM FLUSH switch

to ON position (WP 0004).

With a test lead set, check for 22 to 28 VDC between pump

house wire harness wire 2849 (yellow) at diode pack connector, terminal B and a known

good ground.

If 22 to 28 VDC are not present, repair wire 2849 in pump house wire

harness if repairable (TM 9-2320-325-14&P), or replace pump house wire

harness (WP 0302).

Step 7.

Put pump operator’s panel FOAM FLUSH switch to OFF position (WP 0004).

Pull

battery disconnect switch to off position (WP 0007).

Disconnect pump house wire

harness eductor control valve connector.

With a test lead set, check for continuity

across wire 4054 (yellow) from pump house wire harness diode pack connector,

terminal D to pump house wire harness eductor control valve connector, terminal 1.

a.

If there is continuity, replace diode pack (WP 0269).

b.

If there is no continuity, repair wire 4054 in pump house wire harness if

repairable (TM 9-2320-325-14&P), or replace pump house wire

harness (WP 0302).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION