SHOP MANUAL
Engine
Ch 1 page 212
3. If the engine will start. Increase the engine speed to 1,500 rpm. Read the pressure.
The pressure should be be tween 9 and 14 bar.
4. Close the test connection and remove the pressure gauge.
Descriptions, High pressure check
H1 – Checking for internal leaks
For SDP3 version 2.8 onwards:
1. Follow the instructions for “Fuel leak test” in SDP3. For SDP3 version 2.7:
1. Start the engine
2. Start the test “Checking for internal leaks” in SDP3.
3. Switch off the engine. Read the pressure remaining in the accumulator using SDP3. There should be some
pressure remaining. If the pressure falls more than 300 bar within one (1) minute, there are internal leaks.
4. Check cylinder balancing at idling speed using SDP3. Note if any cylinder deviates.
5. Perform a cylinder output test using SDP3. Note which cylinder deviates from the others by having a higher output.
6. By comparing the two results with each other, a cylinder with deviations in both tests can be identified.
Bear in mind when doing this that there is no method of conrming whether a
fuel lter is blocked. If the complaint is that fault code 135 is activated when un-
der heavy load, this is a probable cause. The high pressure pump can still create
a pressure of between 9 and 14 bar even with a blocked lter.
Low feed pump pressure may be caused by a defective feed pump, or may be
a symptom of a high pressure pump with a defective cylinder head. Note: Make
sure that the battery level is high enough to run the engine at 90 rpm with the
starter motor.
Always use the latest version of SDP3 if possible.
NOTE
NOTE
NOTE
Remember that several injectors can sometimes be faulty at the same time.
NOTE
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