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FUEL SYSTEM
TESTING AND ADJUSTING
2.
Install test plug (17) and then pump (operate)
handle (4) to remove air from the system.
3.
Turn test pressure valve (9) to the "CLOSED"
position and use handle (4) to increase the
pressure above 13 000 kPa on test pressure
gauge (2). PRESSURE MUST NOT GO ABOVE
15 000 kPa.
4.
When handle (4) is released, the pressure will
always drop some amount. If the pressure has
now dropped below the 13 000 kPa, move the
handle just enough to maintain 13 000 kPa (or
TESTER NOMENCLATURE
more) when handle is released.
1. Sight tube. 2. Test pressure gauge. 4. Handle.
5. Injector holding block. 9. Test pressure valve.
5.
If necessary, slightly open test pressure valve (9)
10. Rocker arm. 12. Rocker arm control lever.
to lower the pressure to the desired 13 000 kPa
and close valve (9).
When test pressure valve (9) is in the "OPEN"
position, the operation of handle (4) causes test fluid to
6.
Pressure must not drop to 12 500 kPa in less
be sent to the injector. Use control lever (12) to extend
than 7 minutes.
or retract rocker arm (10). The External Leakage Test,
Tip Leakage Test and the Leakdown Rate Test must
LEAK TEST SPECIFICATION FOR INJECTOR TESTER
each be done with the rocker arm in the retracted
Maximum Pressure Drop
Minimum Time Interval
position.  The Valve Opening Pressure Test and the
500 kPa
7 Minutes
Orifice Inspection Test are each done with the rocker
arm in the extended position.
Leak Test For Injector Tester
1.
The 6V4022 Injector Tester must be checked
with a leak test to make sure that there are no
leaks within the tester. Do this test at regular
intervals to be sure of good operation of the
tester. This test can be done at any time, either
before or after a test of an injector or a group of
injectors.
TESTER LEAK TEST PRESSURE RANGE
(7 MINUTES)
7.
If the test shows too much leakage, find the
leakage source and make the necessary repair.
Check the seals on test plug (17). Test pressure
LEAK TEST
valve (9) is also a possible leak source. This
1. Sight tube. 4. Handle. 9. Test pressure valve.
leakage can possibly be seen at sight tube (1).
17. Test plug.
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