NOTE: When using the Bosch tester (JT25510), use the
KJD10109 Fuel Line and connect line to tester
2. Use Y900-3, Y900-5 Adapters (C) and Y900-2 Fuel
Line (B) from D01110AA Adapter Set to connect
nozzles to D01109AA Nozzle Tester.
3. Position tip of nozzle below top of beaker (D) and back
out 30° from vertical. This is necessary to contain all
spray in beaker, as nozzle spray pattern is at an angle
to the nozzle centerline. Leave connections slightly
NOTE: Rapid operation of pump handle will result in
inaccurate cracking pressure readings and cause
undue wear on gauge.
4. Pump handle several strokes to flush air from lines and
to determine the pumping rate required for proper fuel
atomization. Tighten all connections securely after all
air has been expelled from nozzle and line.
IMPORTANT: Make sure that nozzle tester is in good
condition and that gauge works
properly. Service nozzle tester as
recommended in the operating
instructions provided with tester.
OPENING PRESSURE TEST
NOTE: Actual nozzle opening pressure is less important
than equal opening pressure of all nozzles. For
maximum variation between nozzles see
1. Actuate the nozzle tester rapidly several times to allow
the valve to seat rapidly.
2. Open gauge valve, actuate the tester and raise the
pressure to a point where the gauge needle falls
rapidly. This is the nozzle opening pressure, and
should be as specified for a new or used nozzle.
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