2555 Cab HST - Clicking PTO

[clevalley]

Thank you all for the responses, I greatly appreciate it!

The pto has a overrunning clutch so the mower doesn't drive your transmission when shut down.
On this model it is a cam on a ratchet plate that is spring loaded, some are louder than others. It actually is a normal sound, but like I said before some tractors are louder ....,

Makes sense if the mass of the blower or cutter was keeping the PTO spinning after the PTO was turned off - but clicking when nothing is attached (unloaded) is something I have never heard before, with other tractors that is. If this is the nature of the beat then I can accept it - but if the service manager says 'uh, bring it back, this is not right' - but when it happens after repair it makes one think maybe this is the way it is?! Not sure, but I would imagine service would say 'no, it's ok because....'

Most overrunning clutches I've heard only make the clicking sound when the implement is back driving the tractor PTO shaft. The OP's PTO is making this sound with no implement attached to it at all...something seems wrong here.

That was my thought - with nothing attached it should make no noise, well, short of hearing the shaft spinning - no clicking or clunking.

WOW! With the tractor not running, can you easily turn the output shaft clock-wise by hand? If so, you or the dealer, should pull the seal retainer cover (the part with the two bolts as seen in your video), remove the seal and circlip. Check the bearing pre-load shims. These shims either weren't installed correctly or not enough or, as in my case, destroyed them selves which causes the P.T.O. shaft to "walk away" from the spring loaded side of the over run clutch. Also if the shims have been destroyed, the noise you're hearing could be caused by shim fragments in the bearing races (as in my case). P.S. There should be 3-4 shims between the bearing and the clip.

At first I was going to say 'no, I don't think so' - so I donned my boots and jacket, walked out in the rain, disconnected the PTO shaft and sure enough I can turn the shaft pretty easily. It seems every 1/4 revolution I can feel/hear the click! I did check that there is no movement of the shaft in/out... but there is a distinct feel of something in there causing the click/clunk.

The shaft does not spin counter-clockwise, as it should not.

Above (2nd post) is a complete list of parts which was replaced - I might send an email to the dealer with what you mentioned... but I do have another ~10 acres to cut, after that they can pull it back in and send me another tractor as I use it on darn near a daily basis for other chores and tasks.

 

[clevalley]

Update -

Mahindra Regional Service Rep and an Engineer from Mahindra Corporate are coming in this evening to look at the tractor tomorrow (Tuesday) - Dealer is picking the tractor up from my home this afternoon to take to the shop for them to evaluate and diagnose.

I feel extremely satisfied that corporate is taking the time to look at this.

Dealer did say if my tractor is there for an extended period they will get something out to me so I can continue to mow and work the farm.

 

[clevalley]

For those following - Mahindra over nighted parts for the PTO and replaced, but the problem still remains. The original video was sent to TYM and they came back with 'some of them make this sound' The dealer is furious and lit into the regional rep as they have sold over 40 2555 HST Cabs with zero complaints. The dealer even contacted some of the owners and asked if they are experiencing what they are seeing and none of them are.

The mechanic believes the issue to be in the transmission and they have my tractor split in two.






The owner of the dealership is calling the President of Mahindra today and apparently is going to have a "Come to Jesus Meeting" with him - they have only done this once before. I have complete faith in the dealer as they are REALLY going to bat on this one for me.

The loaner tractor I received - a Mahindra 6055, a model which has not even been released yet! :cool2:

Apparently Mahindra sent it to them to put out in the field to collect data on and I am the first to play with it (at least in my area, don't know about others) - it seems like a decent unit and I am finding quirks as I go along. I snapped some pictures for people to look at but it rained the day it was brought up and do not have any cutting time on it but have played with the loader a bit and drug my driveway with a chain harrow... the unit is collecting data to be sent back to Mahindra to analyze so I am doing my best to log what I am doing doing the hour ranges as they collect.

 

[oldpilgrim]

Tell them to keep the old one and you'll keep the new one.

 

[clevalley]

Tell them to keep the old one and you'll keep the new one.

LOL! If I was not spoiled with HST I would!

They definitely have to refine the fuel mapping for power because I have caught it bogging down severely when it should not, usually in M-3 (it is L, M, H with 5 speeds) but switching to M-2 it does not.

There is a sticker on the console which says "Ignore MIL light intermittent blink" (something like that) - this is the recording system picking up events during operation. I catch the light flickering and it takes my eyes off of what I am doing - I am learning to ignore it but only have ran it for 2 hours. Once the fields dry up I am going to throw the cutter on the back of it and run the snot out of it.

 

[dickfoster]

For those following - Mahindra over nighted parts for the PTO and replaced, but the problem still remains. The original video was sent to TYM and they came back with 'some of them make this sound' The dealer is furious and lit into the regional rep as they have sold over 40 2555 HST Cabs with zero complaints. The dealer even contacted some of the owners and asked if they are experiencing what they are seeing and none of them are.

The mechanic believes the issue to be in the transmission and they have my tractor split in two.

View attachment 509539

View attachment 509540


The owner of the dealership is calling the President of Mahindra today and apparently is going to have a "Come to Jesus Meeting" with him - they have only done this once before. I have complete faith in the dealer as they are REALLY going to bat on this one for me.

The loaner tractor I received - a Mahindra 6055, a model which has not even been released yet! :cool2:

Apparently Mahindra sent it to them to put out in the field to collect data on and I am the first to play with it (at least in my area, don't know about others) - it seems like a decent unit and I am finding quirks as I go along. I snapped some pictures for people to look at but it rained the day it was brought up and do not have any cutting time on it but have played with the loader a bit and drug my driveway with a chain harrow... the unit is collecting data to be sent back to Mahindra to analyze so I am doing my best to log what I am doing doing the hour ranges as they collect.
View attachment 509549

View attachment 509548

View attachment 509547

View attachment 509546

View attachment 509545

View attachment 509544

View attachment 509543

View attachment 509542

View attachment 509541

View attachment 509550

What ever you do, hang on to that dealer because he's a good one.

 

[mikeman1]

Hey, Clevalley, i just got my 2555 hst delivered the other day, tried everything out today, all levers, buttons, switches, hydraulics. everything works fine. EXCEPT my pto makes the exact same noise!!!! I tried turning it CCW and it doesn't turn. CW it turns but like you said, you can feel some kind of a pawl engage about every quarter turn or so. 6ft Rotary worked fine, just used it for about 20 min to try it out. I did notice that at full throttle i didnt hear it, at low throttle i could really hear it, like in your video. I am going to contact the dealer just to be on the safe side, and just wait until you get yours resolved. Please let me know the resolution.

The only other issue I had was the it would not go full throttle, put some cable lube where it connects by engine and all seems well.

What a really nice machine.

Will have a centerfold shoot soon and will post.

 

[clevalley]

Hey, Clevalley, i just got my 2555 hst delivered the other day, tried everything out today, all levers, buttons, switches, hydraulics. everything works fine. EXCEPT my pto makes the exact same noise!!!! I tried turning it CCW and it doesn't turn. CW it turns but like you said, you can feel some kind of a pawl engage about every quarter turn or so. 6ft Rotary worked fine, just used it for about 20 min to try it out. I did notice that at full throttle i didnt hear it, at low throttle i could really hear it, like in your video. I am going to contact the dealer just to be on the safe side, and just wait until you get yours resolved. Please let me know the resolution.

The only other issue I had was the it would not go full throttle, put some cable lube where it connects by engine and all seems well.

What a really nice machine.

Will have a centerfold shoot soon and will post.

MikeMan -

The mechanic believed the issue is in the transmission when it came back and the Mahindra reps were at the shop. Apparently there was a good bit of 'heated discussion' between them and eventually they got the go ahead for a complete teardown and analysis of the transmission - apparently you cannot get a completely assembled transmission from Mahindra, just the parts (to include the casing) - all parts should be in Monday.

The bearings in the transmission for the shaft that runs the length of the transmission to the axle housing (about 3 - 4 feet long)felt rough when they spun. The shaft is gold in color and the interesting point is where the bearings were the shaft was black; this is indicative of a heat issue. The mechanic is going to do a complete hand assembly to ensure it is assembled correctly.

My understanding is the total bill to Mahindra is around 10K, as long as everything goes back together correctly...

If you want, PM me your information because I believe your dealer may want to talk to my dealer about what is going on. I TXT'ed my salesman as soon as I read your response to give him a heads up.

On a side note - this whiz-bang 6055 R&D tractor they dropped off was doing great until we hooked the cutter up to it. The lift arm stabilizers are a new design and it took 3 of us to figure it out... really a piss poor design. Hooked the driveshaft up and not even .2 hours (yes, 2/10th's of an hour) the PTO stub shaft would not spin the driveshaft. I went over a 1" sappling and something gave way internal. I can start the PTO stub shaft spinning and stop it with 3 fingers. This is a brand new Mahindra 7' HD cutter that has about 20 hours of time on it with a slip clutch. I sent pictures, video, etc to the sales department and they are in amazement.

I told my wife I was going to sell everything and buy a condo... LOL

 

[Patweldon]

Mine is doing this I just bought it a week ago. What's the problem. My dealer told me today that they had another on lot making same noise that it's normal. I don't want a tractor back with a problem.

 

[mikeman1]

Pat, I am not sure how Clevalley made out but mine has the same noise at low rpm, high rpm it goes away. i have been using it with no problems. ran it for over 2 hours with the rotary cutter and all hydraulics worked like they did when i started it. My dealer said it is the overrunning clutch and normal. I know CLevalley has had problems with his and was getting it worked on.