Re: John Deer/stanadyne fuel control solenoid

Posted by jdemaris on November 21, 2013 at 05:08:27 from (70.194.7.34):

In Reply to: John Deer/stanadyne fuel control solenoid posted by jm. on November 20, 2013 at 14:57:10:

The solenoid windings themselves are interchangeable. The linkage varies. Early versions had no plunger inside the windings and later ones do. The plunger models seem more prone to getting debris stuck into them and jamming.

The solenoids have no mechanical connection to shut off anything. When turned "on" they force the linkgage to just get out of the way - and a spring pulls the pump's metering valve into "run." So at times solenoids get blames when not the real problem.

Often stuck linkage is the problem. And if the solenoid winding seems shorted it likely just has bad insulator bushings (easy and cheap to fix).

I put a shut-off solenoid winding from a 1982 Chevy truck into a Case 580CK backhoe pump with no problem. Same with a Deere 300B. The Case 188 originally had mechanical shut-off and I converted it to electrtic.

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