Fuel System - Cutting, Hesitation Due To Fuel Delivery
Check of fuel pump in engine 642 and engine 651Topic number LI47.20-P-054504
Version 1
Design group 47.20 Fuel pump, filter
Date 09-20-2012
Validity Models 246; 204; 207; 212; 218; 221; 251; 164; 166 with diesel engine
Reason for change Return pressure and return quantity in attachment changed
Complaint:
Complaints of engine running characteristics (cutting, hesitation) due to possible fuel delivery issues - fuel supply from pumps to the engine.
Cause:
In the event of problems that could be attributable to the fuel pump, the voltage/current values below should be used as reference values when the appropriate return pressures and return quantities are stabilized.
Table of values in attachment:
^ The return pressures and return quantities apply for a closed, operational system (all lines connected)
^ All pressure values are absolute values
^ Tolerance range of specified voltages (+/- 2V) and specified currents (+/- 1.5A)
Remedy:
Check whether the specified values are maintained. If the voltage or current test values deviate, the fuel pump must be replaced as per the EPC.
Attachments
Symptoms
Parts
Work units
Attachment
This appendix refers to GI47.20-P-052889