Dust Detector Operational Test

TB 9-2300-378-14

j. Dust Detector Operational Test (Fig. 6-27).

NOTE

Operational test may be performed with powerplant out of

v e h i c l e if ground hop kit has starter cable modified to

accommodate improved clean air system. If powerplant is out

o f vehicle, rig for powerplant test run with engine air

cleaner (ground hop kit) (TM 20-1).

NOTE

Operational test is the same for both right and left sides.

Open top deck grille doors.

(1)

Remove dust and dirt from filter strip cover and compressor housing.

(2)

Loosen three captive screws securing filter strip cover to compressor housing, but

(3)

do not remove cover.

Insert 1 inch wide strip of non-porous material (plastic, celluloid, etc.) over filter

(4)

strip.

Tighten three captive screws.

(5)

M a k e sure area around vehicle is clear of personnel and

equipment before performing step (6).

(6)

Start engine. Apply vehicle brakes. Put transmission lever in high gear. Operate

engine at 1800-1900 rpm for no more than 30 seconds. Observe powerplant and

dust detector warning lamp.

(a) If powerplant and dust detector warning lamps light, system is operational; go

to step (7).

(b) If powerplant and dust detector warning lamps do not light, check to see if

dust detector switch tripped. A red plunger visible through plastic cover on

switch indicates switch has tripped. If switch tripped, go to Troubleshooting

Malfunction 10. If detector switch did not trip, repeat step 6 to verify. If

switch still does not trip, replace dust detector switch (para. 6-17b).

Stop engine.

(7)

(8)

Loosen three captive screws securing filter strip cover to housing and remove

non-porous material from filter strip and cover.

Tighten three captive screws.

(9)

Press plunger to reset pressure switch.

(10)

(11)

Close top deck grille doors.

6-66