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Read articles →This is a narrow how-to focused on one specific task: adjusting idle speed on the 1025R, 1023E, and 1026R via the Yanmar injection pump's idle stop bolt. It walks through loosening the lock nut with a 10mm wrench, turning the bolt while watching the tach, and retightening once idle reads the target 1,500 RPM. Useful for owners troubleshooting idle issues, not a general tractor overview.
Posted by the Tractor Hoarders channel, apparently an owner sharing a hands-on fix in response to questions seen in tractor forums and groups.
Loosen the lock nut on the idle stop bolt by the injection pump with a 10mm wrench, start the tractor, turn the bolt while watching the tach until it reads 1,500 RPM, then retighten the lock nut.
Idle speed should be set at 1,500 RPM, since going lower isn't enough for the hydraulic pump to run properly.
You need a 10 millimeter wrench, since the idle stop bolt and lock nut on the Yanmar injection pump use metric sizing.
| John Deere 1025R | John Deere 1023E | |
|---|---|---|
| PTO horsepower | 18 hp | 16 hp |
| Loader lift capacity | Not Published | 120R: 1,823 lbf (at pivot point) |
| 3-point lift capacity | 1,177 lb | 1,177 lb |
| Hydraulic flow | 3.5 gpm | 3.5 gpm |
