2021 - Volume #45, Issue #3, Page #32
[ Sample Stories From This Issue | List of All Stories In This Issue | Print this story
| Read this issue]
Repair To 15-Speed Powershift Transmission On My
Deere 4960 Tractor
Reuben Swarey, Henry, Tenn. swareyfarms@emypeople.net: “The 15-speed powershift transmission on my Deere 4960 tractor slipped whenever I pulled a heavy implement down the road in high gear. The dealer thought the clutch was worn out so he replaced it at a cost of about $8,000. The tractor then ran okay for about 1 1/2 years, but then the transmission started slipping again. The same problem happened on another one of my 60 Series tractors.“Then a mechanic friend in Pennsylvania gave me some advice. He said powershift transmissions have a hydraulic valve that releases power to the transmission. When you push in the clutch the valve opens, and when you release the clutch it goes against a small aluminum stop that closes the valve. However, over time the valve wears against the housing and oil leaks out, which causes the clutch to lose pressure. “He recommends using a 3 1/2-in. hand grinder to grind about 3/8 in. off the stop, which will allow the valve to close farther and increase the clutch pressure. I tried the idea on my 4960, and the transmission stopped slipping immediately.”
![](/img/download-story.png)
Click here to download page story appeared in.
![](/img/entire-issue.png)
Click here to read entire issue
To read the rest of this story, download this issue below or click here to register with your account number.