Oil & Fuel JD 2240 injector pump leak.

RHughes · Jun 25, 2015

I'm pulling some basic maintenance and clean up on my dad's 2240. It cranks easily, runs great, and pulls like a champ. However, the injector pump has a leak around the throttle control stem on the top of the pump.
My question is, how difficult is that to repair? I'm a fair mechanic but not a diesel mechanic and I hate trying to work on something with the wrong tools. The last thing I want to do is mess up a good working pump while trying to make what would seem to be a simple fix. I'm more than willing to drop it off at the local diesel pump shop if that's what it takes but I would like to do the work myself if possible.

Thanks!

doxford jim · Jun 25, 2015

Try taking a few photographs to show what your concerns are. It helps when trying to trouble shoot potential probllems as fuel pumps vary quite a bit.

Joel at CDI · Jun 25, 2015

There were a few pumps used on the 2240 through the years, but they narrow down to 2 basic styles. The Roosamaster/Standyne JDB style or a Lucas/Delphi DPA style. On either style throttle seals can be replaced by a competent mechanic, but cleanliness and attention to detail is very very important. On the DPA pumps you will often find wear in the throttle shaft bore in the top cover so a new seal may only be a temporary fix. The top covers are not super expensive so sometimes that is a good option for a more long term repair. Talk to your local fuel shop and see if they will sell you the seals and perhaps give you a few pointers. Some shops will just want to sell you a pump overhaul kit rather than individual seals. They're not too pricey and sometimes its nice to have the extra seals in case a new leak pops up down the road.