FX24 - hard shift in top range

[Patt]

The tranny on my newly acquired FX24 works fine except that in in high range (3) it upshifts hard. The gear selector moves easily, but there is a definite thud going from 1st to 2nd gear. Downshifting (2nd gear to 1st) is smooth and easy.

I should add that I've only noticed this when pulling a 5' shredder, PTO engaged. We're rained in for a week or so, so I can't test the tractor without the shredder for a while.

Operator error? Or, something in the tranny I need to look into?

 

[normde2001]

I would check for a bent shifter fork.

 

[YanmarFever]

The tranny on my newly acquired FX24 works fine except that in in high range (3) it upshifts hard. The gear selector moves easily, but there is a definite thud going from 1st to 2nd gear. Downshifting (2nd gear to 1st) is smooth and easy.

I should add that I've only noticed this when pulling a 5' shredder, PTO engaged. We're rained in for a week or so, so I can't test the tractor without the shredder for a while.

Operator error? Or, something in the tranny I need to look into?

if you are not using an overrunning clutch on the mower, it will make a powershift shift hard

Ernie

 

[normde2001]

The tranny on my newly acquired FX24 works fine except that in in high range (3) it upshifts hard. The gear selector moves easily, but there is a definite thud going from 1st to 2nd gear. Downshifting (2nd gear to 1st) is smooth and easy.

I should add that I've only noticed this when pulling a 5' shredder, PTO engaged. We're rained in for a week or so, so I can't test the tractor without the shredder for a while.

Operator error? Or, something in the tranny I need to look into?

Are you talking about "shifting on the go"? No reason to do that on a tractor.

 

[Patt]

Yes, Norm. I'm "shifting on the fly." My operator's manual implies that is the the preferred method - clutch for range changes and PTO (tractor stopped) and gear selection without clutch ("on the fly"). If I've misunderstood this, I'd appreciate your input...and I'd be more than happy to write this off to operator error.

Thanks,
Don

 

[John47]

I have the FX235 Patt and when I change up or down when I'm brush hogging it happens to me, I'd say it's normal. OK in low revs as in when driving normally though.

 

[normde2001]

Yes, Norm. I'm "shifting on the fly." My operator's manual implies that is the the preferred method - clutch for range changes and PTO (tractor stopped) and gear selection without clutch ("on the fly"). If I've misunderstood this, I'd appreciate your input...and I'd be more than happy to write this off to operator error.

Thanks,
Don

There's just no reason to "shift on the fly" on a 5-8mph tractor. If it were mine I wouldn't do it, especially if it causes problems. Be mindful, that ops manual was written by American users, not by the Yanmar factory.

 

[Patt]

Thanks to each of you for taking the time to respond to my problem.

Ernie,
The overrun clutch might be the answer. I'll check with John47 to see if he uses one.

John,
How 'bout it? Do you have an overrun clutch on your FX235?

Norm,
It's the old, "If it hurts when you do that, don't do that," huh? Well, I think that's pretty good advice. Until I learn diffrently, I think I'm gonna give up that extra 1/4 mph.
On the other hand, it's still raining. Maybe it's time to dust off the tools and get better acquainted with the Powershift tranny...

Again, thanks to each of you,
Don

 

[Eddie]

The Powershift in my 2020 does that. It will leave 2 black marks on my drive shifting from 2 to 3 in high range and wide open throttle. I'd rather have it like that than slipping when shifted.

 

[YanmarFever]

If any of you guys are using a mower without an overrunning clutch on your yanmar, its just a matter of time, and you will be shopping for parts to repair your favorite toy.

Power shifting on the fly is ok if you are going SLOW, if you slam that shifter while its revved up, you will be shopping for a new ring & pinion gear for the rear axle.

We have repaired over 12 ring & pinions in the last 8 years, and believe me I never know where I will find the next one. (tuff to find)

We parted out an FX24 3 years ago because the owner did'nt want to wait & we could not find one for it fast enough

an overrunning clutch is cheap insurance !!

Hoye tractor sells them

Ernies Imports

 

[Eddie]

I use an over run clutch, and I use the clutch when I'm shifting. I was just saying what mine does when I don't use the clutch.

 

[Patt]

Ernie,

Thanks for the tip on the overrunning clutch. I've installed one on my tractor despite being advised that the "live" clutch on my FX24 negated the need for this clutch.

I didn't know what one of these devices was until I went shopping for it, but once I got my hands on one, it was immediately apparent that I was going to install it - even if it was redundant. I bought mine at TSC for $60. If anyone else is considering the purchase, I have some words of warning.

Although the installation instructions called for me to remove the grease zerks and "install the spring pin," the unit does not come with a spring pin. Make sure you leave the store with one. Never having received the Mechanic of the Month award, I didn't know what a "spring pin" was. Undaunted, I determined that one of the thousand or so roll pins I've got would work for this purpose. I found one of the proper size and used it. I tapped it in to the proper depth using a 1/4" drift and, of course, boogered a couple of threads that accept the zerk. No biggie, I've got taps, and looking at the thing I could tell it was 1/8-NPT(27) as I'd expect with a zerk, right? Wrong! 3/8 (28). So I ended up tapping the hole twice.

The 5 minute job is done . . . in about 45 minutes. But I'm glad I installed it. Thanks for your warning.

Don

 

[EFC]

Ernie, I just ordered the last 12 bolt ring and pinion for a FX255 in Japan. 1400.00 my cost.

Buck

 

[YanmarFever]

Hi Buck

I just used our last one we had on an FX24-D

I have a stack of broken ones here from years gone by.

Ern.

 

[Mickey_Fx]

Hi Buck

I just used our last one we had on an FX24-D

I have a stack of broken ones here from years gone by.

Ern.

Ernie, you mean your're not holding one back for me in case I mess up?

 

[YanmarFever]

Mickey,
You're to good to mess up

Ern.