John Deere 301-A Tractor

Carole Payne

New User
Tractor gradually ran down, and quit. So far we have replaced fuel filter, air filter, sediment bowl, fuel pump, drained and checked fuel, and still won't run more than 10 minutes. Any suggestions would be appreciated.
 
If it is a Diesel check your muffler. Local JD shop many years ago rebuilt their 3010 shop tractor. Dynoed great on break in. Then the put the manifold on and performance went in the tank. Replaced the muffler which was sooted up and back in business.

Nother thought have you checked fuel flow out of the tank? Might be a bit of rust/dirt/etc partially plugging it up.

jt
 
I would take the return fitting out of the top of the injection pump. This is an elbow fitting. It has a check valve built into it so be care full if you blow it out. This check valve has a clear glass check ball in it so seeing light through the fitting still does not mean it is not plugged. If you find small black specks of rubber in that fitting the injection pump will need overhauled. The governor dampening ring is falling apart. Then the small pieces of rubber plug up the pump. The return fitting is usually first and then the internal parts in the pump.
 

Easy way to check if fuel return line fitting on a diesel is plugged is to loosen both screws on inj timing window,pry gasket loose if engine will then run for an extended amount of time check valve in return fuel line is plugged.
 

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