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PROCEDURE
1
Start the test bench.
2
Read the data in the manufacturer’s instructions to set the correct pressure of the test
bench.
3
Slowly increase the pressure of the test fluid until test fluid comes out as a spray from
the injection valve.
4
Record the opening pressure.
NOTE:
The opening pressure must be between 340 bar and 410 bar. The opening
pressure for new injection valves is 375 ± 10 bar.
NOTE:
Most of the test fluid will come out as a spray from the top set of holes in the
nozzle tip.
5
Decrease the pressure of the test fluid until the spray stops.
NOTE:
No test fluid must come out of the nozzle.
6
If the opening pressure is not correct, adjust the opening pressure, refer to the related
procedure.
7
Do a check of the seating surface between the needle seat and the nozzle as follows:
7.1
Set the pressure of the test fluid at approximately 50 bar below the opening
pressure.
7.2
Monitor the injection valve for 30 seconds. Look to see if test fluid comes out of
the nozzle.
8
Decrease the pressure of the test fluid to zero bar.
9
Stop the test bench.
10
If the injection valve does not operate satisfactorily, disassemble the injection valve as
given in section
7.5.5 Conventional injection valve - disassemble
NOTE:
You must replace nozzle tips that have worn holes. It is possible, but not
recommended, to replace the nozzle tip with the needle installed. If it is
necessary to do this, do the procedure carefully.
Only the injection valve manufacturer, or an authorized company can repair or
replace nozzle holders and nozzle bodies that have unsatisfactory sealing
surfaces.
CLOSE UP
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None
X82-B
AA00-2722-01AAA-340A-A
Maintenance Manual
Conventional injection valve - do a functional test
Winterthur Gas & Diesel Ltd.
- 268 -
Issue 001 2020-10
Содержание X82-B
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