ENGINE FUEL SYSTEM
FUEL FILTER PRESSURE DROP - STEACE-R TEST 26
Detects clogging via opening of a differential pressure
Set TEST SELECT switches to 26.
transmitter across the fuel filter.
Run engine with throttle control at MAX per TM 5-3895-
DCA Test Pins: s and t
Press and release TEST button.
Observe displayed value. Expected display Is PASS.
Run confidence test per TM 9-4910-571-12&P.
If .18.104.22.168 Is displayed, voltage is not within test
POSSIBLE ERROR MESSAGES
If STE/ICE-R display is FAIL or .22.214.171.124, check differential pressure transmitter per paragraph 2.21.
Fuel is very flammable and can
explode easily. To avoid serious
injury or death:
Always wear safety glasses/goggles
at all times.
Keep at least a B-C fire extinguisher
within easy reach when working with
fuel or on a fuel system.
Do not work on fuel system when
engine is hot; fuel can be ignited by a
Direct contact with a high pressure
fuel spray may cause serious injury.
Wear protective goggles and gloves.
Avoid direct contact with fuel spray.
If fuel spray penetrates your skin, get
medical aid immediately.
To gain access to fuel lines, open front top left access
door, front top right access door, left access door, and
left access cover per TM 53895-373-10. Remove engine
access cover per paragraph 2.22.
Close front top left access door, front top right access
door, left access door, and left access cover per TM 5-
3895-373-10 and install engine access cover per
If uncertain of fuel pressure at the injection pump, very
slowly loosen fuel injection pump input straight adapter
until fuel just starts to drip. If fuel continues to drip, the
line and adapter are under pressure. Stop cranking the
engine and retighten the adapter.