White 2-88 PTO

[NY Farm]

View attachment IMG_0535.jpegUnder light duty, I have cracked 2 PTO clutch housings. New housings are not available and they are getting harder to find from salvage.
What could be causing this?View attachment IMG_0536.jpeg

 

[scootergmc]

What does your brake plate look like? Is there any friction material left or has it been running metal to metal?

 

[2SteveWI]

View attachment 110641Under light duty, I have cracked 2 PTO clutch housings. New housings are not available and they are getting harder to find from salvage.
What could be causing this?View attachment 110643

What is your Pto clutch pressure? I am assuming that your PTO is similar to my 2-105. They are the same as 17,18,1955. I had a cracked drum from someone putting a spool in backward on the hydraulic control valve and overpressuring the PTO. Steve.

 

[scootergmc]

Check out these images on a pto we just rebuilt. The brake just isn't strong enough for most PTO equipment and really shouldn't be used. My old mechanic friend said to just disable the brake. Once the friction material wears, it's then metal to metal against the drum until it overheats and cracks. Yours is cracked in the normal places where they get hot. See the burning on the drum in my photo, cracks (ours were on the back side), and wear of the brake material. Lesson, just shut the tractor off when you need to change equipment.

 

[oliverkid]

Check out these images on a pto we just rebuilt. The brake just isn't strong enough for most PTO equipment and really shouldn't be used. My old mechanic friend said to just disable the brake. Once the friction material wears, it's then metal to metal against the drum until it overheats and cracks. Yours is cracked in the normal places where they get hot. See the burning on the drum in my photo, cracks (ours were on the back side), and wear of the brake material. Lesson, just shut the tractor off when you need to change equipment.
View attachment 110712View attachment 110714View attachment 110716

The PTO break was never intended to bring pto equipment to a dead stop. Especially anything with a lot or rotating mass. Just click the leaver out of the engaged detent to release the clutch, let the implement coast to a stop, then click the leaver all the way back into the brake detent to hold the pto from coasting. Simple as that. No reason to disable the pto brake.

 

[NY Farm]

What does your brake plate look like? Is there any friction material left or has it been running metal to metal?

The brake plates in both housings that cracked had no friction material at all. Friction material was an older option that we did have on a
White 2-85. It is no longer available. The second housing that we put into the 2-88 had a metal ring riveted and welded to the PTO housing
with no friction material. This housing came from salvage and lasted 1 hour running a small sprayer pump. No sign of overheating like
your picture shows. Thanks for your suggestions as to not using/disabling the brake.

 

[NY Farm]

What is your Pto clutch pressure? I am assuming that your PTO is similar to my 2-105. They are the same as 17,18,1955. I had a cracked drum from someone putting a spool in backward on the hydraulic control valve and overpressuring the PTO. Steve.

PTO clutch pressure was 90 psi when we checked it but the hydraulic pressure control valve may have been stuck since the PTO worked fine all season and cracked immediately upon first use the following season. I disassembled the pressure control valve and found nothing wrong inside.
Maybe the pressure control valve sticks intermittently and overpressures the PTO. Thanks for your ideas.

 

[scootergmc]

The brake plates in both housings that cracked had no friction material at all. Friction material was an older option that we did have on a
White 2-85. It is no longer available. The second housing that we put into the 2-88 had a metal ring riveted and welded to the PTO housing
with no friction material. This housing came from salvage and lasted 1 hour running a small sprayer pump. No sign of overheating like
your picture shows. Thanks for your suggestions as to not using/disabling the brake.

What do you mean friction material was an older option on the housings? I know the earlier drum is no longer available, as the rivited drum was superceded. We too welded (improved) a rivited clutch drum/housing. But the friction material is on the brake plate, as we just ordered and installed it: https://agpartsfirstllc.mybigcommerce.com/power-take-off-brake-plate-30-3312038/

 

[scootergmc]

The PTO break was never intended to bring pto equipment to a dead stop. Especially anything with a lot or rotating mass. Just click the leaver out of the engaged detent to release the clutch, let the implement coast to a stop, then click the leaver all the way back into the brake detent to hold the pto from coasting. Simple as that. No reason to disable the pto brake.

Yes, I'm aware of how it should be utilized and I agree with you for the most part. But there's absolutely reason to disable it when you run a large farm with multiple pieces of equipment and have different farmhands running things, especially when english is a second language and the only one who knows how to do everything is the foreman who's been there 35 years and you hope he never leaves, and he definitely isn't running tractors anymore.

Again, my perspective comes from an 85 year old mechanic who worked the large farms and ranches all over this area, and yes, the equipment is big and heavy, and a lot of rotating mass.

 

[scootergmc]

Just one more thing- I seem to remember him telling me a story of a PTO that had a broken spring in the valve which caused something to go haywire internally in the PTO, similar to this. I think. It's too late to call him and ask otherwise I would.