Export thread

06 Troy Built Bronco with CVT transmission Developed violent jerking while it's set to drive forward , However it ride and cut so smooth and fast on Reverse ... I jacked it up and placed in gear (f) and it doesn't do it , It only does it with a load as i am setting on it . This has developed so rapidely.

Tell me what to check ..


Here is the Model # 13AO77TG766

Serial # 1A136B40162



Thanks

28 views and no one with an answer

The pro's around here have day jobs. First we will need your model number and serial number so we can see exactly what mower your actually have From your description sounds like the sift collar and pinion gear are worn and not engaging properly.

cobra390t said:

28 views and no one with an answer

Click to expand...

So what makes you think any one of those 28 had any idea of what mower you have or any ideas of how to fix it.
This is to a large extent an adult site frequented by competiant mechanics or owners with little to no technichal expertese
Thus we are not a face book page full of people with inferiority complexes compelled to "me too" within 9 nanno seconds of a post being published.
If 27 of the browsers who are obviously snubbing you had posted a "Howdy" would you be any better off ?

And 2 of those "views" was me and this reply makes it 3

I was too sick last night to reply. But am feeling a little better this AM. I would check all the mounting bolts for the rear end for tight or broken off.

Did not mean to stir up the pot by my comment of " how many viewers and no respond" .


Here is the Model # 13AO77TG766

Serial # 1A136B40162



Thanks for all your help

BlazNT said:

I was too sick last night to reply. But am feeling a little better this AM. I would check all the mounting bolts for the rear end for tight or broken off.

Click to expand...

Thanks man .. Hope you feel better . Nothing was brook that i could notice but again i have no idea any thing is possible

bertsmobile1 said:

So what makes you think any one of those 28 had any idea of what mower you have or any ideas of how to fix it.
This is to a large extent an adult site frequented by competiant mechanics or owners with little to no technichal expertese
Thus we are not a face book page full of people with inferiority complexes compelled to "me too" within 9 nanno seconds of a post being published.
If 27 of the browsers who are obviously snubbing you had posted a "Howdy" would you be any better off ?

And 2 of those "views" was me and this reply makes it 3

Click to expand...

Howdy


I hardly ever post in any forum or FB in fact i don't even have account, Therefore was not sure what is the respond rate ,My bad ...:laughing:

you actually have a gear transmission with and forward and reverse gears inside. The gears have notches in them that get engaged by a sliding shift collar, the notches on the sliding gear and the forward engagement gear are worn, and will allow jumping of the notches which will be felt like jerks. You will need to pull the tranny and replace those gears and sliding collar.

Before removing the tranny just check then condition of the belt to make sure there isn't any pieces missing that could cause slippage and jerking.

ILENGINE said:

you actually have a gear transmission with and forward and reverse gears inside. The gears have notches in them that get engaged by a sliding shift collar, the notches on the sliding gear and the forward engagement gear are worn, and will allow jumping of the notches which will be felt like jerks. You will need to pull the tranny and replace those gears and sliding collar.

Before removing the tranny just check then condition of the belt to make sure there isn't any pieces missing that could cause slippage and jerking.

Click to expand...

The belts have seen some usage /better days , Saw hair cracks from the inside but i will check for missing chunks , One thing i noticed is when i push the left foot pedale the tractor doesn't stop as good as it use to be , I groomed her flower bed few times mis judging the break :confused2:

Thank you for the great information you provided friend. DO you mind pointing out the exact parts you are refering 2 by referencing this diagram i found listed on this part supplier web site .Greatly appreciated it

https://www.partstree.com/parts/tro...y-bilt-bronco-lawn-tractor-2006/transmission/

cobra390t said:

Howdy


I hardly ever post in any forum or FB in fact i don't even have account, Therefore was not sure what is the respond rate ,My bad ...:laughing:

Click to expand...

The smart phone generation seem to have problems when they do not get an answer the instant they post.
Apparently according to the neice if the "like" comes more than a minute after she posts something that means the person actually hates her.
She sends me an email and expects answers instantly and when I dont she sends texts to 1/2 the extended family wondering why I don't like her.
Apparently this is fairly typical of generation I ( phone) and I might add she is 22.

Dosn't drive, thinks "poping around" is sending me a couple of selfies. can't afford to move out or even own a car but has no trouble finding $ 250/ month for phone bills.

There are some mower forums that seem to be frequented by similar persons, a dozen or more welcomes & howdys within a few minutes but no one actually addresses the problems.
And if you need to know I still use the Nokia 600 most of the time.

Now to work.
The clutch/brake pedal has adjustments on it and the brake itself has an djustment.
On the clutch you tighten the nut in the center to make the brake more agressive.
Follow the rod that pulls the brake on and you should find an adjustment .
Most times I am backing it off for customers to make the braking less violent.
The brake has to be set so that the belts starts to slip just before the brake comes on so the brake & the box are not fighting each other.

PS this is the 5 th time I have viewed your post.
There is a recient post function on this forum and a lot of regular users utilize this function so every time they log in they read all the new posts thus you get a large number of views bit a lot of them are from the same person or even the moderators.

Upon close inspection again No missing chunks out of the Belts or any slipages , However i noticed that the Rear Right wheel is the worse during Left turn meaning as i turn Left it slips so bad , jerks and jumps and clicks out of its brain and won't go forward had to put it in reverse then Forward to get it going . Regardless the Jerking , jumping still there as i am going straight but so bad as i am turning .

cobra390t said:

The belts have seen some usage /better days , Saw hair cracks from the inside but i will check for missing chunks , One thing i noticed is when i push the left foot pedale the tractor doesn't stop as good as it use to be , I groomed her flower bed few times mis judging the break :confused2:

Thank you for the great information you provided friend. DO you mind pointing out the exact parts you are refering 2 by referencing this diagram i found listed on this part supplier web site .Greatly appreciated it

https://www.partstree.com/parts/tro...y-bilt-bronco-lawn-tractor-2006/transmission/

Click to expand...

#16 and or #15 but you must do a visual inspection to see for sure. So what I am telling you is to look inside the transmission and check to see what parts are needed before you purchase anything.

Well i took the transmission apart and found no busted gears or worn out teeth that they could jump out @ me , however the grease inside looks so liquefied but not runny like fluid YET . I also noticed that the main belt which mount to the main tranny pulley was cracked and missing chunk out .

I am going to clean the gears ,housing by soaking them in a Kyroseen or Diesel bath to clean them up .... Any special kind of grease i should be using , Any other parts i need to check since i am that far into it . I will post pic once i clean it

Ok now get me the number off the tranny case and I will get you the grease or gear oil it needs.
Then after its all back together we will adjust the brake or clutch or both.

Regardless of what is recommended I alway use 00 grease , sometimes called "liquid grease" in all grease packed gearboxes.
If you go that way you get it from a farm supply company in a 2 gallon pail for $ 30 as apart from a mower shop at $ 5 for a 2 oz tube.

One more thing. Make sure all the things I have circled have square corners. Even slightly rounded off one can cause the problem you are having.

The case stamped with 719-04017 , Right now the gear box is soaked in Kerosene to clean up all that gunk ..I will pull the parts and inspect them closely to your referenced point .


The main axel shaft where the wheels hanging on each end enters a box that remind me of Mini rear defrential .Do i need to check for any thing in there ..It appears as if its factory sealed on one

bertsmobile1 said:

Regardless of what is recommended I alway use 00 grease , sometimes called "liquid grease" in all grease packed gearboxes.
If you go that way you get it from a farm supply company in a 2 gallon pail for $ 30 as apart from a mower shop at $ 5 for a 2 oz tube.

Click to expand...

I have Tractor Supply near by . hope they sell some of that 00

They should do most PTO bevels use 00 grease, by the bucket full.
The bull gears on some of our old tractors that do not have oil seals also run in liquid grease, about 3 gallons of it

Could not locate locally that 00 grease any where , In fact non of the local part store know what i was talking about , The local lawn shop highly recommend to stick with whats the manufacture calling for , they looked it up but and found Part # .. 737-0300A and told me i need 19oz of it but no clue what is the grease viscoity is . Any one know where to get that grease or that 00

Found the 00 Grease at NAPA 32Oz for $13.33 it's part # Napa 7-06612

The generic name is "liquid grease"
In grease grades it is 00
mower shops that are more sales romm than workshop will know it as Stihl head grease, or hedge trimmer gearbox grease and they sell it in 2 oz & 4 oz tubes for a silly price.
Google liquid grease and you will get a lot of hits.
Oregan do it in 4oz tubes but as said earlier tractor supply shops will sell in the 5 gal buckets
Most specialist bearing shops will sell it

Auto stores won't
hardwear store won't

Upon taking a close look @ the clutch Collar as i was told to do by other member here , I think i found my problem for sure the edges are rounded on the Collar on one side , It seems that this collar is by directional and can be installed regardless to which side you put 1st

Yes you can flip it however because the other gear tursn in the opposite direction you just transferr the problem to the reverse.
naturally it will be less of a problem in reverse but it won't go away.

I ordered new one

I hope you ordered new thrust washers as well
They wear thin so the dogs don't bind deep enough and you will be back to where you started from in about 1/2 the time it took you to get here the first time.

bertsmobile1 said:

I hope you ordered new thrust washers as well
They wear thin so the dogs don't bind deep enough and you will be back to where you started from in about 1/2 the time it took you to get here the first time.

Click to expand...

Which thrust washer you are referring 2


Do you mean part #3&18 in this diagram

https://www.partstree.com/parts/tro...y-bilt-bronco-lawn-tractor-2006/transmission/

cobra390t said:

Which thrust washer you are referring 2


Do you mean part #3&18 in this diagram

https://www.partstree.com/parts/tro...y-bilt-bronco-lawn-tractor-2006/transmission/

Click to expand...

yes.

total clearence between the shaft and the case should be .020" cold

bertsmobile1 said:

yes.

total clearence between the shaft and the case should be .020" cold

Click to expand...

Based on all the great tips/ information you provided I am certain that some one had been inside this transmission box before and left few things on the bench.

I found the One side Of the shaft had one thrust washer and the other side had only 2 washers without thrust washer . With time that caused the clutch collar to fail indeed and slips

Parts list offer few various size of thrust and washer sizes which obviously acts as shims to achieves the above mentioned tolarence spec

I Ordered new set of thrust washer and hope that will get it going

The worst one I have pulled down had so many washers packed in there the shaft was tight on the housing.
he had put shims on the sliding dog so the arm pushed it further across and had packed out the drive gear tp\opush in further down & deeper into the two crown gears.
The box was that tight you needed a 18" spannar on the imput shaft nut to turn it around.
His complaint that brought it into me was it kept on snapping drive belts and throwing idler bearings.
Down here that crown gear is $ 148 and the sliding dog is $ 122 ( both plus GST ) so I can see why he did it , but belts are $ 75 so it was a false economy

bertsmobile1 said:

The worst one I have pulled down had so many washers packed in there the shaft was tight on the housing.
he had put shims on the sliding dog so the arm pushed it further across and had packed out the drive gear tp\opush in further down & deeper into the two crown gears.
The box was that tight you needed a 18" spannar on the imput shaft nut to turn it around.
His complaint that brought it into me was it kept on snapping drive belts and throwing idler bearings.
Down here that crown gear is $ 148 and the sliding dog is $ 122 ( both plus GST ) so I can see why he did it , but belts are $ 75 so it was a false economy

Click to expand...

:laughing: ...... The average DIYer most likely will over look the max specified manufacture designed tolerance and some might not so worry about torque values to a degree , the tighter the better and the more snug the safer

Last update :


Installed new thrust washer , washers , put the transmission all back together and filed it with 00 grease about 19-20 OZ or So:roll eyes: . Put every thing back together Succusfully and took it for a spin around the yard . feels like a new mower ... Now its time for it to go to a new Home ....


Thanks every one for helping me out