TuffTorq K46 Repair Guide with Pictures

[vmaxman]

Here are some photos of what it takes to convert a K46 to a K57. I have not included ALL parts needed, just the center case and charge pump assembly. This will give you an idea of what is involved.

Here is a photo showing the main components. Center case up top. New input shaft in the middle. Charge spring is shown bottom left, next is a small plastic piece that is used to help install the charge pump case, charge pump case, outer rotor, inner rotor, roll pins, inner rotor drive pin.



Here is a shot of the center case with new input shaft inserted, and inner rotor drive pin installed. NOTE: If you were putting this together, you would want to install the roll pins first



A different angle of the input shaft and rotor drive pin installed.



Inner rotor slides onto input shaft and over drive pin



Charge pump case. Note the two balls get installed before installing it on the input shaft



Charge pump case with outer rotor installed on top of balls



Install assembly on input shaft. Align inner rotor with outer rotor and end of input shaft with corresponding hole in charge pump case



Spring gets installed on charge pump



As noted, the roll pins should be installed in the center case before it is installed in the transmission. Due to the input shaft being offset where it enters the charge pump, it will only line up properly one way. Just spin the charge pump assembly to line up with the roll pins.



There are many more parts that tuff torq reccommends that you purchase to do a full K46 to K57 upgrade. I am only showing the parts pertaining to the charge pump.

I noticed that the inner rotor and outer rotor have a mark stamped in them on one side. I sent an inquiry to tuff torq asking if it matters which direction the marks face (ie. towards the center case/away from center case...) I have yet to receive a response.

Hopefully someone finds this info useful. I've searched around the net and have not been able to locate anything regarding this upgrade other than a parts list.

Mike

 

[vmaxman]

I have attached two documents I received from Tuff Torq regarding the K57 Upgrade. One shows a parts list for the upgrade. One is a parts diagram. I have also attached the list of parts I purchased for the trans I am working on. I just replaced some misc seals, orings, and the filter so I didn't feel it was necessary to purchase all parts on the list. I use yamabond4 to seal the trans. I've had 100% better luck with the yamabond versus RTV on all my projects. Another plus with the yamabond is that you can refill with oil the same day. I like to wait at least an hour. Longer if you can. I use Castrol 5W-50 Syntec oil.

 

[Kyle_in_Tex]

Thanks Vmaxman, you have original type Vmax or 1 of the newer one's?

 

[vmaxman]

Thanks Vmaxman, you have original type Vmax or 1 of the newer one's?

2006 which is the old style.

 

[wactbn]

I have attached two documents I received from Tuff Torq regarding the K57 Upgrade. One shows a parts list for the upgrade. One is a parts diagram. I have also attached the list of parts I purchased for the trans I am working on. I just replaced some misc seals, orings, and the filter so I didn't feel it was necessary to purchase all parts on the list. I use yamabond4 to seal the trans. I've had 100% better luck with the yamabond versus RTV on all my projects. Another plus with the yamabond is that you can refill with oil the same day. I like to wait at least an hour. Longer if you can. I use Castrol 5W-50 Syntec oil.

Bravo! Thanks for the great write up and photos.

When I emailed Derek at TT about this conversion last year, he simply said it's best for him to do the work and only offered a shipping estimate. I will definitely want to do this when my rebuilt transaxle needs another overhaul, since my L130 gets a fair amount of use snowblowing in the winter.

Thanks again!

 

[motster]

Hey gals for help Tuff Torq | Driving Your Best Ideas call (423) 585-2000 speak to PAM ... shes a ROCK STAR she knows her stuff totally pleasant and spot on with questions of your hyda trans problems .. laters .. and good luck

 

[phcaan]

Great work everyone, this is a treasure house of knowledge about a supposed non repairable transmission. I just acquired a Husqvarna tractor that has a Hydro Gear G7-BCBB-1XDC-1FCA do you know of anyone who has changed the oil in this transmission?

 

[HillsvilleScott]

Re: TuffTorq K46 / John Deere L110 Transmission Repair Guide with Pictures

I am in the process of doing this fix on a K46BN, a Craftsman. I currently have the directions reversed. Yes, I know about the 'motor housing' (#36) being installed up-side down will cause that. According to the parts exploded diagram on Tuff Torq's site, the 'motor housing' (#36) is wide end up with a notation about checking the orientation. I also looked at the diagram for a K46V, a John Deere. I didn't know your serial number range, but everyone will be interested in knowing that the 'motor housing' in that model's exploded parts diagram has the wide side down. The photos in your presentation have the wide side up. Somebody is wrong. Did your tractor go in the right directions with the proper pedals with the part positioned as shown in your photos? It should not have. OR TT has some editing to do on their website.

 

[HillsvilleScott]

I called TT numerous times and selected the Sales & Service option. Answering as Pamela, I had to leave a message. She did get back to me once explaining the recommendation of also purchasing a new center case. Unfortunately, the last time I called her, her voice mailbox was full. Asking for a different department got me a real person who immediately forwarded my request to Derrick Dalton's...voice mailbox. Patiently awaiting callbacks.

 

[Voyager6]

Re: TuffTorq K46 / John Deere L110 Transmission Repair Guide with Pictures

When I was changing axles on my K58A (to B configuration) I noticed the wedge was opposite to that shown in most K46 threads. I called TT and they insisted the direction of the wedge shown in their parts diagram was the correct way it goes. I looked at every K58 variation and fortunately, they were all the same way, the way the wedge was located when I took the cover off. I went through many of the K46 diagrams on TT's site and there are some with the wide side up and others down. The K58 was new, for a K46CC to K58B upgrade. I left it as is and it worked fine for me.

The only thing I can say is that the models with the short splined axles (JD 4 wheel steer models) are ALWAYS incorrectly shown as long keyed axles. Only the photos are usually, but not always correct.