The guy whos working on my JD 2440 head says he ordered a rocker arm from the local JD dealer (and he said the parts dept leaves a great deal to be desired since they were bought out) but anyway they said the part was obsolete but subbed to another part number. When it arrived it looked like a completely different animal. Instead of a cup on the end it has a ball end like the original push rod end. The parts guy just shook his head. I called a different JD dealer and he said he thought I would need to get a new push rod that has a cupped end and also a special nut but the Jd pic didnt show what the special nut was for. He also said I could use the new rocker arm and push rod with the existing rocker arms and wouldnt need to replace them all. He said it looked like JD was using the rocker arms from the 50 series a subs. Anybody know if it would be best to try to find NOS rocker arm instead, and if so where I can look for JD NOS rocker arms for a 2440? All the dealerships near me are now owned by the same big company and they have no NOS for me. Thanks.
- Thread starter Dromunds
- Start date
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
RE31973 is subbed part # I locate. I would think tractor salvage yards would have numerous old part # rocker arms for JD 300 series engines.
wore out
Well-known Member
As long as the ratio is the same and the valve clearnance can be set properly after the new parts are installed there should be no issues, IMHO.
On a related note, my gas 4020 has 11 of the original-style welded stamped steel rocker arms and one replacement cast iron rocker arm (which is quite different in shape) and has worked just fine for many years.
That ''update'' did NOT require a pushrod swap, though.
Cliff Nelson
Well-known Member
RE31973 is the latest version of the original style rocker arm. That subs to the new style that they gave you. If you look up the push rod in the 2440 catalog, it subs both the push rod and rocker arm but that sub got overlooked for the rocker arm. There are several nos RE31973 rocker arms available on ebay. Reliance also offers new aftermarket in the original style.
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