III. Engine Servicing Procedures
U
L-Series Diesel 26
Injector Leak Test
The leak test should be conducted
immediately following the nozzle opening
pressure adjustment check.
⇒
Wipe the nozzle with a clean shop
towel.
⇒
Decrease the tester pressure about 20
kg/cm
2
less than the pop-off pressure
and maintain the position.
⇒
There should be no fuel discharge from
the nozzle for at least 10 seconds.
⇒
Re-clean or replace any nozzle that
doesn’t meet the criteria.
Glow Plug Inspection
The following procedure tests the
resistance value of the glow plug.
NOTE:
The test can be performed on or off the
engine.
Total glow plug resistance value should be
≤
0.9 ohms.
On engine service:
•
Remove the buss bar from the glow plug.
•
Attach the DVOM red lead to the to the tip of
the glow plug.
•
Attach the DVOM black lead to a good ground
source. Verify the ground integrity by testing it
with the DVOM.
Off engine service:
•
Disconnect and remove glow plug.
•
Place DVOM leads across glow plug (one lead
at each end) to obtain resistance reading.
Summary of Contents for 3LA
Page 42: ...VII Appendix Miscellaneous Service Information U L Series Diesel 41 NOZZLE...
Page 43: ...VII Appendix Miscellaneous Service Information U L Series Diesel 42...
Page 44: ...VII Appendix Miscellaneous Service Information U L Series Diesel 43...
Page 45: ...VII Appendix Miscellaneous Service Information U L Series Diesel 44...
