TESTING - TM-10-3930-638-24-P0855

TM 10-3930-638-24&P

4-3. FUEL SYSTEM MAINTENANCE (cont)

a. Fuel Injector (cont).

REMARKS

ITEM

ACTION

STEP

LOCATION

NOTE

Always test performance of a fuel injector before disassembling.

If fuel injector tests are satisfactory, there is no need to disassem-

ble or adjust.

TESTING

CAUTION

Don't use motorized equipment or steel wire brushes for cleaning

as orifices in body will be destroyed.

NOTE

Don't scrape or brush Teflon coating above carbon steel groove.

Fuel injector

Clean

Remove loose carbon from tip, carbon seal

groove and body below groove using brass

wire brush as shown

Fuel injector

Install on

Don't attempt to connect fuel injector inlet

test stand

fitting directly to standard Ermetro or 60

degree swaged type as damage to tubing

can result. Use suitable adapter

WARNING

Always direct injector tip away from you. Fuel from spray ori-

fices can penetrate clothing and skin causing serious infection.

Always be sure injector tip is enclosed in a receptacle (preferably

transparent) to contain spray. If skin is broken by fuel injector

spray, get medical attention immediately.

4-77