OM606- Sanity check fuel line air leaks
OM606- Sanity check fuel line air leaks
bypassing pre-filter has not remedied the problem. I suspect the SOV seal, or the SOV itself is a contributing source to the air leak? Can anyone describe the port operation on the SOV and on the return fitting at the filter housing?
On the SOV,- there are 4 ports:
A: Hidden Nipple behind SOV that is sealed into the IP
B: Top forward Port - to output of Main fuel filter
C: Top rearward Port - to output of Pre-Filter
D: Bottom port to suction side of lift pump
I presume when the SOV is DE-ENERGIZED, ports B & C are connected and Ports A & D are connected. When Energized, Ports A & B are connected and ports C & D are connected?
Also- why is there a return line fitting connected into the filter housing? This is where the injection pump return line, the injector return line and the tank return line meet. I get those 3 connections but why is there a sealed port into the filter housing? Does the return passage somehow connect/interact to the pre-filter or main filter passage(s)?
Well-
bypassing pre-filter has not remedied the problem. I suspect the SOV seal, or the SOV itself is a contributing source to the air leak? Can anyone describe the port operation on the SOV and on the return fitting at the filter housing?
On the SOV,- there are 4 ports:
A: Hidden Nipple behind SOV that is sealed into the IP
B: Top forward Port - to output of Main fuel filter
C: Top rearward Port - to output of Pre-Filter
D: Bottom port to suction side of lift pump
I presume when the SOV is DE-ENERGIZED, ports B & C are connected and Ports A & D are connected. When Energized, Ports A & B are connected and ports C & D are connected?
Also- why is there a return line fitting connected into the filter housing? This is where the injection pump return line, the injector return line and the tank return line meet. I get those 3 connections but why is there a sealed port into the filter housing? Does the return passage somehow connect/interact to the pre-filter or main filter passage(s)?
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