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 FUEL SYSTEM
TESTING AND ADJUSTING
Look at test pressure gauge (2) during the procedure
in Step 3. High pressure can come rapidly, so be
careful. PRESSURE MUST NOT GO ABOVE 14 000
kPa.
3.
Pump the tester just fast enough to maintain a
pressure between 10 000 and 14 000 kPa on
gauge (2). With this amount of pressure on the
injector, make a thorough visual inspection of the
injector for any leakage.
4.
There must be no leakage at the seals. If there
is leakage, new seals must be installed. Make
this repair before any other tests are started.
LOAD CELL PRESSURE RANGE
5.
The Load Cell Pressure for a new or used
injector must be 3100 to 4100 kPa. If pressure
is not within this pressure range, do not use the
injector again.
IV. External Leakage
INJECTOR UNDER TEST
2. Test pressure gauge. 4. Handle. 9. Test pressure
valve.
5.
If there is leakage at any part of the injector
(except at the rack hole or from the injector tip),
do not use the injector again. A repair or
replacement of the injector must be made.
If there is leakage at the rack hole or from the
injector tip, do the LEAKDOWN RATE TEST and the TIP
LEAKAGE TEST (after EXTERNAL LEAKAGE TEST is
complete) to see if the leakage is excessive.
NOTE: If there is to be a repair to the injector, see
INJECTOR INSTALLED FOR TEST
REPAIR OF UNIT INJECTORS in Special Instruction,
2. Test pressure gauge. 4. Handle. 9. Test pressure
Form No. SEHS8190.
valve. 25. Injector.
V. Tip Leakage
1.
Remove all fluid from the injector holding block,
1.
Remove all fluid from the injector holding block,
injector body and injector tip with a clean cloth.
injector body and injector tip with a clean cloth.
2.
Close test pressure valve (9).
Be sure the
2.
Close test pressure valve (9).
Be sure the
injector tip is completely dry.
injector tip is completely dry.
NOTICE
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