Tractor problem

Ji Case 35172 · May 5, 2018

I thought I solved the problem with my Case 930 I thought it was the fuel filters but it is not. It runs fine until it gets up to its normal operating temperature and then it starts to run bad and barely runs until it finally dies then you have to wait for it to cool down a little bit before it will start again. Any ideas on what this is the tractor is a diesel. Thanks.

DeltaRed · May 5, 2018

Does it have a RoosaMaster pump? If so,the (plastic) governor retaining ring is disintegrateing.Remove the little rectangular timing cover on the side of the pump. If what you see looks like coffee grounds,you've found the problem.The pump must be removed to be repaired.The pump it self wont need to be rebuilt,only the ring replaced.Not a super expencive repair.Common problem with older RoosaMaster pumps on older tractors.

VicS · May 5, 2018

I had to put a vacume-pressure guage in a tee just in front of the pump. Had a line long enough to reach the dash. Only to know its not fuel.

Ji Case 35172 · May 5, 2018

No it is a Bosch pump

ss55 · May 5, 2018

Could the vent in the fuel tank cap be plugged, creating a vacuum in the fuel tank? When it starts to run poorly, try opening the fuel tank cap to let some air in.

showcrop · May 5, 2018

Carry a gal of water with you. when it stops slowly pout it over the pump. If it starts right up the pump is worn out.

Ji Case 35172 · May 5, 2018

Thanks I will try that tomorrow and let you know how it goes.

Dieseltech · May 5, 2018

I doubt it's a pump problem. If the Bosch pump has worn plungers you would be having problems starting both cold and hot. I'd suspect fuel supply. May be simple as a plugged fuel cap vent. No air in, means no fuel out.

Bruce from Can. · May 5, 2018

My guess would be one of two things , and neither are related directly to the tractor reaching operating temperature. Number one thing I would look for is something in the tank, blocking the fuel from getting a good supply to the pump/filters. Number 2 would be , is there something restricting the air intake? I would take the air intake apart , and look for foreign objects that could be blocking air flow, like mouse nest.

jon f mn · May 5, 2018

Did you change the filter up front by the radiator? How much fuel is in the tank? Do you have fuel flow at the pump? Checking for venting of the tank is a good idea altho I've never seen that problem. I usually put in an electric fuel pump in those, I have one in my 1030.

Grampajohn · May 5, 2018

wouldn't the fuel return line to the tank take away the vent problem? Since the pump is returning unused fuel back to the tank will this not pressurize the tank over time?

I would check to make sure the fuel return line to the tank is not plugged up also. I know on a roosamaster pump if the line is plugged it will not run, not sure how a bosch will function with a restriction.

StanIowa · May 6, 2018

common problem on 930 and 1030 is hand primer pump check valves to be plugged. Take the primer pump apart and check the valves. Stan

Tractor problem

Ji Case 35172

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DeltaRed

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VicS

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Ji Case 35172

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ss55

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showcrop

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Ji Case 35172

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Dieseltech

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Bruce from Can.

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jon f mn

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Grampajohn

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StanIowa

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