HST not moving fast

[BAP]

Make sure your flywheel is good when you are in there. There must be some reason as to why a hydrostatic transmission tractor ate a clutch up especially at only 155 hours.

 

[ZXD1]

Make sure your flywheel is good when you are in there. There must be some reason as to why a hydrostatic transmission tractor ate a clutch up especially at only 155 hours.

I’m guess the old owner didn’t know how to drive it and was letting the clutch out while pressing the hst pedal like a traditional manual transmission. Or something along those lines. Already found a few corona bottle caps lol

 

[lugbolt]

yeah be glad you're not putting a clutch in a gear drive. They are often a two-stage clutch, and quite expensive. HST is single stage.

yes there are a few operators that use the clutch on hst,s to start and stop, slip the clutch while holding the hst pedal to the floor, and pushing into a pile of dirt...usually at full throttle and in high gear as well. Yeah that'll smoke a clutch pretty quickly. I remember doing a 3301DT once where the owner used it for a dozer, but tried to cover up the evidence (bent bucket, stick-welded new cutting edge on the bucket, etc), at 28 hours as I remember, clutch was FRIED, as was the flywheel and everything else. Splitting the tractor would take your breath away. It STUNK to high heaven. That's the only clutch job I've ever done that made me sick to my stomach just from the stink. And being a DT with a dual clutch, it was about $3300 as I remember. "Should be under warranty". Ok, the rep is here I'll ask him. Rep walks out there and looks at the bucket and says "hahahahahahahaha".

 

[North Idaho Wolfman]

I’m guess the old owner didn’t know how to drive it and was letting the clutch out while pressing the hst pedal like a traditional manual transmission. Or something along those lines. Already found a few corona bottle caps lol

I'll second your thoughts on it's clutch destruction.
FYI: DO NOT turn the flywheel surface.
If it's badly damaged ( gouges, serious cracks, scarring) you will need to get a new flywheel.
If it's just blued or crazed, just sand the surface lightly with 100 grit paper and call it good.

 

[North Idaho Wolfman]

yeah be glad you're not putting a clutch in a gear drive. They are often a two-stage clutch, and quite expensive. HST is single stage.

yes there are a few operators that use the clutch on hst,s to start and stop, slip the clutch while holding the hst pedal to the floor, and pushing into a pile of dirt...usually at full throttle and in high gear as well. Yeah that'll smoke a clutch pretty quickly. I remember doing a 3301DT once where the owner used it for a dozer, but tried to cover up the evidence (bent bucket, stick-welded new cutting edge on the bucket, etc), at 28 hours as I remember, clutch was FRIED, as was the flywheel and everything else. Splitting the tractor would take your breath away. It STUNK to high heaven. That's the only clutch job I've ever done that made me sick to my stomach just from the stink. And being a DT with a dual clutch, it was about $3300 as I remember. "Should be under warranty". Ok, the rep is here I'll ask him. Rep walks out there and looks at the bucket and says "hahahahahahahaha".

You've worked on way too many tractors over the years, so I'm not trying to call you out, but It had be a L3901DT as the 3301DT only has a single stage clutch.

Crazy part is the L2501DT and the L3301DT only have a single stage clutch, so yes NO live PTO, talk about cheap design!
There is a really good reason for a HST in a L in either of those models!

 

[lugbolt]

You've worked on way too many tractors over the years, so I'm not trying to call you out, but It had be a L3901DT as the 3301DT only has a single stage clutch.

Crazy part is the L2501DT and the L3301DT only have a single stage clutch, so yes NO live PTO, talk about cheap design!
There is a really good reason for a HST in a L in either of those models!

you're right...been too long. was a 3901.

have done a few others about 2 decades ago, also dual stage. Adjusting a dual stage is fun. Through an inspection hole in the side of the clutch housing with a pair of wrenches as I remember. I'm certainly glad I'm not going that stuff anymore; although what I'm doing now is not really a picnic either. Just traded one set of problems for others is all, but I like it.

I did some deere stuff in the early 1990's and a lot of those were dual stage clutch, had to adjust them as well but at least they was a little easier to get into.

the 3301 had like 7 hours on it, was less than 10, smoked the clutch in that one too.

Guy that took my place was just mentioning the 2501/3301 having single stage clutches when I talked to him last night, and I kinda understand why they do it--to keep the cost down. Understandable, given the purpose of those two tractors. They're quite popular around here too.

 

[ZXD1]

I'll second your thoughts on it's clutch destruction.
FYI: DO NOT turn the flywheel surface.
If it's badly damaged ( gouges, serious cracks, scarring) you will need to get a new flywheel.
If it's just blued or crazed, just sand the surface lightly with 100 grit paper and call it good.

Finally got around to splitting it. She’s crispy for sure flywheel definitely has some bluing and has some waviness on the clutch mating surface. No visible cracks that I can see. Any reason specifically not to resurface?

 

[North Idaho Wolfman]

The reason you do not resurface these flywheels is that any dimensional changes effects the clutch movement quite drastically.
clean it up then use a flat edge and check for warping.
If it's wrapped replace it, if not just rough up the surface and run it.
Make sure you set the clutch linkage up properly or you'll fry a new clutch disk in a quick hurry.

 

[ZXD1]

The reason you do not resurface these flywheels is that any dimensional changes effects the clutch movement quite drastically.
clean it up then use a flat edge and check for warping.
If it's wrapped replace it, if not just rough up the surface and run it.
Make sure you set the clutch linkage up properly or you'll fry a new clutch disk in a quick hurry.

Awesome I’ll just break the glaze, clean it up and run it.

 

[hagrid]

Ran it down to the ribbets.

 

[North Idaho Wolfman]

Ran it down to the ribbets.

Yep right up until it croaked!

 

[ZXD1]

Alright guys finally got the clutch on Friday and got it all back together Saturday. Played with it a little today and it’s doing great! Thanks for all the help.

 

[Chanceywd]

Finally got around to splitting it. She’s crispy for sure flywheel definitely has some bluing and has some waviness on the clutch mating surface. No visible cracks that I can see. Any reason specifically not to resurface? View attachment 95447 View attachment 95448

I've never seen a disc worn like that one!

Someone never read their operating manual.

Bill

 

[Glockem]

What did that end up costing you? Thanks,

 

[D2Cat]

I've never seen a disc worn like that one!

Someone never read their operating manual.

Bill

Here's one that was wore out!! Was on a L2050.

 

[lugbolt]

I've seen worse.

I think I talked about it once, one of the more memorable ones, once it was split, the stink of burnt clutch lining and burnt metal took your breath away. I was "ok" with it for a little bit but eventually I started puking, had to get out of the shop a while. The entire building stunk in about 2 hours time. Boss said put that thing outside. Well it's split, how we gonna move it? Had to get real creative with a forklift, carried both halves outside and let it sit until customer showed up to inspect. The steel spring in the middle of the disk was all that was left. Most have not paid much attention but a lot of disks have the lining riveted to a backing. The backing is slightly wavy. Eases clutch engagement. This one was all the way past the rivets into the backing. Needless to say it needed everything. And really needed an educated operator.

seen a few with splines ripped out of the disk but no other damage. HST's and GST's usually

a few that had a bunch of hours, just worn out. It happens.

One broken disk (similar to pictured above). Someone put the disk on backwards. They are directional. Installed backwards they are a lot weaker and IME will self-destruct even without abusing them. Some of them you physically can't install them but one way (offset, hits the flywheel bolts) but some you can so ya gotta pay attention. Also had a pressure plate come apart on a L2350 once. No reason why.

and we won't even talk about my own stuff (automotive). If it can be broken I probably broke it at some point. Pressure plates, levers, springs, disks, input shafts, gears, output shafts, pedals, linkages, driveshafts, u-joints, lots of rear ends, crankshafts, bolts, flywheels...just OTOH. Expensive hobby.

 

[Chanceywd]

I've seen worse.

I think I talked about it once, one of the more memorable ones, once it was split, the stink of burnt clutch lining and burnt metal took your breath away. I was "ok" with it for a little bit but eventually I started puking, had to get out of the shop a while. The entire building stunk in about 2 hours time. Boss said put that thing outside. Well it's split, how we gonna move it? Had to get real creative with a forklift, carried both halves outside and let it sit until customer showed up to inspect. The steel spring in the middle of the disk was all that was left. Most have not paid much attention but a lot of disks have the lining riveted to a backing. The backing is slightly wavy. Eases clutch engagement. This one was all the way past the rivets into the backing. Needless to say it needed everything. And really needed an educated operator.

seen a few with splines ripped out of the disk but no other damage. HST's and GST's usually

a few that had a bunch of hours, just worn out. It happens.

One broken disk (similar to pictured above). Someone put the disk on backwards. They are directional. Installed backwards they are a lot weaker and IME will self-destruct even without abusing them. Some of them you physically can't install them but one way (offset, hits the flywheel bolts) but some you can so ya gotta pay attention. Also had a pressure plate come apart on a L2350 once. No reason why.

and we won't even talk about my own stuff (automotive). If it can be broken I probably broke it at some point. Pressure plates, levers, springs, disks, input shafts, gears, output shafts, pedals, linkages, driveshafts, u-joints, lots of rear ends, crankshafts, bolts, flywheels...just OTOH. Expensive hobby.

Neither myself or my wife are hard on clutches. Her bought new subaru forester has 128000 miles with the same one. My 8n has its changed once in 25 years and that was because i was fixing a transmission problem and had it split so did one then. I think that was a Tisco unit and it has held up well.
Drove a lot of high milage used cars years ago and would change a clutch in them. But they were always worn evenly or the springs were broken.
Just never seen one so worn as the OP had, I would have thought it would have stunk slipping.

Bill

 

[lugbolt]

I would have thought it would have stunk slipping.

You'd think, but alas, not everyone knows what that smell is, and sometimes they have other smells in their nose that mask the stench of burnt clutch. And some of us don't have a sense of smell, sometimes related to #2. One of my old coworkers couldn't smell a burned clutch, but he was a heavy smoker and couldn't smell much of anything. I'm doubled over about to puke from a really stinky clutch and he's like, eh no big deal.