Diesel Fuel Problem

60 acre hillside · Sep 3, 2011

john Deere 450 would not hold steday RPMs. was acting like starving for fuel. Replaced fuel filter and checked out lift pump. Plenty of fuel to injector pump. I could not remove the return line because the line appears to be stuck in the compression nut.My question, Should it run with return line removed? Is the return line and fittings prone to become clogged? I want to eliminate all simple things before calling a serviceman to remove and repair injector pump.

60 acre hillside · Sep 3, 2011

Sorry about the typos. I went back to correct and the changes did not get into the text.

Russ from MN · Sep 3, 2011

I would run some cleaner-conditoner through it before I spent a lot of money on it!

Cliff Nelson · Sep 3, 2011

If it has a Roosa-Master pump, removing the return line is the next step. Also remove the return fitting from the pump cover. More than likely the governor ring has come apart and plugged the return fitting. Common problem. Cleaning fitting will work for a while but governor will fail eventually.

Bob Bancroft · Sep 3, 2011

450 dozer? Roosa Master injector pump? They are known for (in general) a piece coming apart inside- plugging return line/fitting, and causing running problems.
Others on here know all the details.

Billy Shafer · Sep 4, 2011

If the return line is clogged.It will cause the pump to build up pressure that will stop the fuel flow. Very common for the seals in the pump to come apart over time.Which will also cause your problem.

Diesel Fuel Problem

60 acre hillside

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60 acre hillside

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Russ from MN

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Cliff Nelson

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Bob Bancroft

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Billy Shafer

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