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This one leaked bad at idle and leak dimished as engine loaded up. Fuel came out of vent hole of flange between air pump and fuel pump.

Fuel pump came back from vendor. Cost was $26.00 for parts, mostly seals and o rings. Labor $400.00 Leaks were caused by dryed out and cracked o rings. Besides leaks situation made it difficult to start engine if hadn't been run recently.

Number here is at least $500.00 depending on what is wrong with it. Check with vendors in your area. Cummins has its own depot/shop in Newark, NJ on Doremus AV and there are several independent diesel fuel system sops in northern NJ. IN AZ they had to send it to CA for the cure.

My 818 showed up with at least a class 2 leak between the PT fuel pump and the air compressor. Leak at input shaft on front of pump. Leaked most when at idle, less when driving or shut off. Engine also getting hard to start if not run recently. Sent pump out to be resealed. Instructions for...