TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 302 of 1563

TM 9-2815-220-24

FUEL BACKFLOW VALVE AND RELATED PARTS REPLACEMENT

0046 00

WP 0046 00-2

Test (Continued)

2.

Check by-pass function of valve (1).

a.

Remove hose (5) and cap off side leg of tee (6).

b.

Remove hose (7) and cap off inlet fitting (4).

c.

Provide fuel into valve at bottom leg of tee (6) and gradually increase pressure.

(1) Fuel should not flow from outlet fitting (3) until pressure reaches 85-95 psi.

(2) Fuel should flow freely from outlet fitting (3) between 85-95 psi.

3.

Check backflow function of valve (1).

a.

Remove cap from inlet fitting (4) and install it on outlet fitting (3).

b.

Provide fuel into valve at bottom leg of tee (6) and gradually increase pressure to 100 psi.

c.

There should be no fuel flow out of valve at inlet fitting (4).

4.

If valve fails any one of the three checks, return it to depot for repair.

END OF WORK PACKAGE

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