Specifications

Service Training
Page 7
Section 4.1
09.06
4.1.1.4 ADJUSTING THE INJECTION VALVE
CHECKING THE OPENING PRESSURE
NOTE: Use only test oil acc. to ISO 4113 or diesel fuel for the test.
CAUTION: When checking injection nozzles, take care that the fuel jet does not hit the hands. Due to the
high pressure, the fuel can penetrate the skin and cause severe injuries.
- Install the injection nozzle on the nozzle tester.
- Press the lever down slowly. Read the pressure at the start of fuel ejection and adjust the pressure, if
necessary, by changing the shims.
Specified pressure
New injection nozzles 260
+8
bar
Pressure for re-usability 255
+8
bar
ADJUSTING THE INJECTION NOZZLE OPENING PRESSURE
- Clamp the holder 110110 for the injection valve in a vise.
- Place the top part of the injection holder into the holder 110110 and unscrew the union nut.
Sequence of disassembly:
1. Union nut
2. Injection nozzle
3. Intermediate piece
4. Pressure spindle
5. Compression spring
6. Shims
7. Nozzle body
- Adjust the pressure by fitting the correct shim. The thicker the shim,
the higher the opening pressure will be. Re-assemble the injection
valve. Tighten the union nut to a torque of 40 - 50 Nm. Check the
injection valve with the nozzle tester.