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 276 of 1563

TM 9-2815-220-24

FUEL/WATER SEPARATOR OPERATION TESTS

0042 00

WP 0042 00-6

TESTS (Continued)

2.

Test automatic drain valve (13) operation (continued):

WARNING

Do not allow upper and lower sensor probes to come in contact with

each other or with metal container.

Do not touch probes.

Failure to

comply may result in electrical shock, inaccurate test results, or

damage to equipment.

a.

Hold tips of upper and lower sensor probes (14 and 15) in water.

b.

Listen for solenoid drain valve (13) to click and fuel to drain from tube (18).

(1) If click is heard and fuel drains, go to step 3.

(2) If fuel fails to drain and click is heard, check solenoid drain valve (13) and lines for

obstructions "Fuel/Water Separator Replacement," WP 0084.

(3) If fuel fails to drain and click is not heard:

(a)

Disconnect harness (25) from solenoid drain valve (13).

(b)

Place positive lead of multimeter in socket A of harness (25) and negative lead to

ground.

Hold sensor probes (14 and 15) in water in suitable container.

Check for

voltage, and then remove sensor probes from water.

(c)

If 24 V dc is present, replace solenoid drain valve (13) (WP 0084).

If 24 V dc is

not present, replace fuel/water separator control box (20) (WP 0084).

20

13

18

25

14

15