Tractor drive speed question

[rmonio]

I知 curious - my 4600 seems slower when driving forward in my fastest gear. If I shift between them, everything seems normal but it just seems that it is slower. It doesn稚 slow down under load - it just seems like it runs slow.

The tractor is 20 years old - can the HST pump go bad over time? Just curious. The dealer said I was imaging things. .

Thanks!

-Bob

 

[beenthere]

Maybe some clarity on your explanation.
Correct, it is the HST tranny.. and there are three "ranges" A, B, and C..

Highest range seems to be slow (not just under-powered).. Have you owned this 4600 those 20 years? What are you doing with the tractor in the highest range?

Here is the troubleshooting page from the service manual.. shows things that may need to be checked (if the column with the red arrow agrees with your thoughts/feelings).

 

[rmonio]

Maybe some clarity on your explanation.
Correct, it is the HST tranny.. and there are three "ranges" A, B, and C..

Highest range seems to be slow (not just under-powered).. Have you owned this 4600 those 20 years? What are you doing with the tractor in the highest range?

Here is the troubleshooting page from the service manual.. shows things that may need to be checked (if the column with the red arrow agrees with your thoughts/feelings).

Thanks. Yes, it is a HST transmission. Usually I’m driving - plowing snow and moving hay bales now (rounds).

I will check these items or perhaps take it down to John Deere and let them check it as well. Due to age, it could very well be one of the items that are listed.

Thanks again!

-Bob

 

[dodge man]

Do you know the speed it is suppose to run? With my tractor I used a GPS app on my phone and checked its speed and it was 1 mph faster than spec, on smooth pavement of course.

 

[Bavarian]

Tire sizes and types do matter. R3 or R4 will be slower than R1's due to circumference.