Click here to make tpub.com your Home Page

Page Title: Injector holding pressure test. O p e r a t e
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 10-3930-242-34
Figure 3-19. Fuel injector control lever and tube assembly,
disassembly and reassembly.
m o u n t e d in test stand, pump and maintain a
tors by the fuel pump and serves as a coolant. In
pressure of 1600- to 2000-psi. Inspect for leaks.
a d d i t i o n to serving as a coolant, circulation of
R e l i e v e test pressure slowly to prevent damage
the surplus fuel bleeds away air or vapor in the
to test gage.
system back to the fuel tank where it is vented
t o the atmosphere. Surplus fuel leaving the in-
WARNING
jectors flows through outlet fuel line to fuel re-
The injector must always be held in such
t u r n passage and then through a restricted fit-
a way as to prevent any fuel from penet-
ting and a tube back to fuel supply tank.
rating a person's skin. Fuel oil which en-
b. Removal. Refer to figure 3-20 and remove,
ters the bloodstream could cause serious
fuel i n j e c t o r s and fuel lines.
infection or death.
NOTE
(2) Injector holding pressure test. O p e r a t e
Cap the filter caps with shipping cap after line
t h e tester to bring pressure up to approximately
removal to keep out foreign material.
450 psi. Close fuel shut off valve and note pres-
c. Fuel Injector Testing.
sure drop. Time for a pressure drop from 450 psi
(1) I n j e c t o r r a c k a n d p l u n g e r m o v e m e n t .
t o 250 psi should not be less than 40 seconds.
Check to see if plunger works freely in its bush-
Injector should be checked for leaks as follows:
i n g by placing injector against a bench and de-
(a) T h o r o u g h l y d r y i n j e c t o r w i t h c o m -
pressing follower to the bottom of its stroke
p r e s s e d air.
while moving the rack back and forth. Failure to
(b) Open tester fuel valve and operate
p r o d u c e a free rack indicates internal parts of
t e s t e r to maintain testing pressure.
injector are dirty or damaged. With injector

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business