Fuel System - High-Pressure Pump Leaking
High-pressure pump leaking
Topic number LI07.02-N-048800
Version 1
Design group 07.02 Injection pump, unit pump, high pressure pump
Date 02-18-2010
Validity Engine 646 in model 639 and engines 642/646 in model 906
Reason for change
Reason for block
Complaint:
High-pressure pump leaking in the area of the low-pressure connections.
Cause:
Leakage at the connecting point between fuel hose and high-pressure pump connection pipe, caused by low outside temperatures.
2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)
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2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)
Page 108
2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)
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Remedy:
Do not replace the high-pressure pump (1) !!!!
1. Check whether the poly-V belt is contaminated with fuel.
2. If it is contaminated with fuel, replace poly-V belt. (See AR13.22-S-1202S).
3. In order to localize the leak on the high-pressure pump (1), clean the high-pressure pump (1) and spray it with MB leak detector spray.
4. If the high-pressure pump (1) is found to be leaking in the area of the low-pressure connections:
^ Replace hose clamps and fuel hoses (2) of feed and return lines of low-pressure connections.
Note:
Only use the specified hose clamps.
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