turn up the fuel pump

Sure you can but you may rip your tractor apart. Spec's are given for a reason, some people follow them others wish they did.
You have an old D2, if you boost the power and break a lot of hard to get parts, what do you accomplish. Work it as it is and it will last a long time.
If it hasn't got enough power get a D6.
Later Bob

It would help if you told us a little more about your tractor... have you had it long, or is it new to you ???

Are you using with a blade, or ground engaging implements ??

Have you operated another D2 of similar vintage that outperformed yours ???

I ask these questions to learn whether your expectations are realistic.


If the tractor is new to you, it would be wise to first establish that it is in tune: valves properly adjusted, fuel injection pump lifters set to specification, fuel rack set to factory spec for your serial number,that it is running at proper RPM's, adequate fuel pressure & clean fuel filters, assure diesel air intake is clear of obstructions.

If these things are good, and the diesel has adequate compression, there is really no need to Hod Rod it by increasing the fuel... its doing what it was designed to do.

The later D2's do make a bit more horsepower, and I have found it is noticeable when pulling a disc in the hills... If you continue to be unhappy with the power yours makes, perhaps a later model D2, or D4 is in your future. Above all, Have fun with it.