All-Terrain Lawn Tractor Forum

Like riding lawn tractors through mud, woods, rocks, and snow? Then this is the place for you! Share your ideas, Post your projects and more!
 
PortalHomeFAQSearchMemberlistRegisterLog inCountdown Timer
Swing by the Chatroom anytime! Next Chat Event - 12/16/2017 @ 8:00pm EST .
Welcome to the All Terrain Lawn Tractor Forum!
Voting for the 2017 Build-Off has ended! Click Here to view results!
The prize list has been finalized! Check out what's up for grabs by clicking here!
The new 2017 ATLTF stickers are in! View them here, and order yours while they're hot!
We now have a Discord chat server! Contact Doug for an invite link!

Share | 
 

 General Transaxle Information + Myths

View previous topic View next topic Go down 
AuthorMessage
Doug
Webmaster
Webmaster
avatar

Age : 22
Join date : 2012-12-24
Posts : 2618
Forum Rep : 16
Location : 17042, Pennsylvania

PostSubject: General Transaxle Information + Myths   Sun Feb 02, 2014 10:48 am

This is some generic info I got from the ARMA Build Clinic. All of the following information is directly from the mouth of seasoned ARMA mower racers who have tried and experienced the following. A lot of this specifically applies to racing and high speed, but some applies to offroad.

Stuff in [brackets] are stuff I added in.

1.) On opposing shafts in most transaxles, the gear teeth equal 50. For example, a 23 tooth sprocket will be across from a 27 tooth. With the MST series, they equal 40.

2.) Shift keys are made out of spring steel. When they get hot, they will contract and begin to skip.

3.) Transaxles dont mind being overdriven as long as they are properly ventilated and use a quality lubricant (synthetic), torque is mainly what kills them. [This mainly applies to racing, as torque is a major factor in offroading.]

3-1.) Support the shaft when overdriving. Too much tension will wear out the case.

3-2.) 700 series transaxles should have AT LEAST a 1/4" inch mount plate.

4.) Tapping the Neutral Safety Switch hole for a vent is 100% OK. It gives you more beef for the threads.

5.) When assembling transaxle gear cassettes, be sure that the "bubble" in the shims face toward the shift keys. This helps to guide the keys into the gears.

6.) DO NOT USE CARB CLEANER ON OILITE BRONZE BUSHINGS! Bronze bushings are made out of a special material called Oilite, which is oil-infused bronze. This helps to lubricate and makes your bushings last longer. Putting parts cleaner or carb cleaner on them removes the impregnated oil and they lose their lubricating quality. When cleaning, just wipe off with a dry rag.

6-1.) Some transaxles, mainly in John Deere tractors, use STEEL bushings. If you can, replace them with Bronze Oilite, as when steel rubs on steel they get hot and weld together, which will destroy your case.

7.) CASE BOLTS DO NOT NEED TORQUED. Tight + 1/4 turn is good enough. You want them to be tight, not overtight.

7-1.) Transaxle cases are cast without threads, which are made by the bolts at the factory {self-tapping bolts). Because of this, when you re-assemble you run the risk of re-tapping your holes. To prevent this, put your bolt in the hole and turn it backwards until you feel a "drop", and then tighten.

8.) To measure your belt PERFECTLY, use an old oversized belt with a cut. Wrap the belt from the front to back pulley (bypassing the clutch), but run the belt on the INSIDE OF THE ENGINE PULLEY and along the OUTSIDE OF THE TRANSAXLE PULLEY, and clamp it. Then, when you go to get a new belt, it will be the perfect size and will match your clutch motion.





Thanks to Aaron Crowl, Philip Lytle, and the other ARMA racers for the info!

_______________________________________________
Back to top Go down
Doc Sprocket
Administrator
Administrator
avatar

Age : 44
Join date : 2013-04-21
Posts : 2862
Forum Rep : 9
Location : Ontario Canada

PostSubject: Re: General Transaxle Information + Myths   Sun Feb 02, 2014 11:06 am

Some good info here, thanks for posting. I can add a couple points, too-

On the transaxle gear tooth count thing- this is true primarily for Peerless 700 and 800 units, however I DO have one set that totalled 49. I counted repeatedly to make sure. The point of the total count is to ensure that you've come up with a matched set.

Tranny vent- Get yourself a brass fitting that is 1/4"NPT on one end, 1/4" hose barb on the other end. The pipe end WILL thread nicely into the tranny's neutral switch boss, BUT- you may have to cut grind or file a few threads off the end of the fitting. If it threads in too far, it may interfere with part of the shifter fan. BOTH 700's that I have vented, as well as MULE's 930, I have had to do this.

Carb cleaner on oilite bushings- I'd take that one step further- do not use a solvent, period. They CAN be re-impregnated, but just avoid the whole thing.

Torquing case bolts- I wasn't there for the conversation, but as a general rule, I gotta disagree. Tecumseh-peerless published torque specifications for these things, and I'm gonna stick to them.

Tranny shift washers (what are referred to as "shims" in your text)- there are TWO designs, the bubble and the bevel. Yes- the bubble (convex side) gets installed towards the keys. In the case of the bevel style, install bevelled side towards the keys. They ARE fully interchangeable. If you have both styles, you don't need to worry about having them all the same. One is just a newer style than the other.

_______________________________________________
***Get YOUR official "Doc Locked, And Ready To Rock!" Stickers by clicking here!***
***Official Sprocket's Garage vinyl graphics and tees for sale HERE!***

Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
MULE- http://www.atltf.com/t2153-lawn-boy-utltv
MULEII- http://www.atltf.com/t3328-1970-john-deere-112-the-beginnings-of-mule-ii
MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
Wrench, Wheel, Wreck, Repeat...
Back to top Go down
Doug
Webmaster
Webmaster
avatar

Age : 22
Join date : 2012-12-24
Posts : 2618
Forum Rep : 16
Location : 17042, Pennsylvania

PostSubject: Re: General Transaxle Information + Myths   Sun Feb 02, 2014 11:22 am

Thanks for posting that, they did go over a lot of that stuff I just didnt scribble it down in time.

_______________________________________________
Back to top Go down
1997 Murray
Expert
Expert
avatar

Age : 19
Join date : 2013-11-13
Posts : 1311
Forum Rep : 1
Location : NW USA

PostSubject: Re: General Transaxle Information + Myths   Fri Mar 14, 2014 10:37 am

The 915 peerless has a 12:1 ratio in high gear, the mst has a 15:1 ratio, and some older peerless and most spicers have a 9:1 ratio.
Back to top Go down
Ariens YT11
Veteran
Veteran
avatar

Age : 20
Join date : 2012-10-31
Posts : 743
Forum Rep : 0
Location : The Wyo-Braska Panhandle

PostSubject: Re: General Transaxle Information + Myths   Fri Mar 14, 2014 1:37 pm

Speaking of transaxles what ratio ?:? is a Peerless 844 5 speed?
Back to top Go down
http://pmwcm.forumotion.com/
1997 Murray
Expert
Expert
avatar

Age : 19
Join date : 2013-11-13
Posts : 1311
Forum Rep : 1
Location : NW USA

PostSubject: General Transaxle Information + Myths   Fri Mar 14, 2014 3:25 pm

The best way to find out is to put it in gear and see how many times you have to spin the input shaft to turn the axle once.  the 915 has a unique 5th gear and revirse power flow.



the 5th gear locks the input gear to the shaft, and reverse is gear driven.
Back to top Go down
Angchor
Skilled
Skilled
avatar

Age : 60
Join date : 2014-04-14
Posts : 491
Forum Rep : 0
Location : Index, Washington

PostSubject: Re: General Transaxle Information + Myths   Sat Apr 19, 2014 2:44 am

I have been cleaning sintered bronze bushings with mineral spirits for 4 decades. (Then just covering with grease and reinstalling.)

Never had any problem with premature wear.
Back to top Go down
Doc Sprocket
Administrator
Administrator
avatar

Age : 44
Join date : 2013-04-21
Posts : 2862
Forum Rep : 9
Location : Ontario Canada

PostSubject: Re: General Transaxle Information + Myths   Sat Apr 19, 2014 8:16 am

@Angchor wrote:
I have been cleaning sintered bronze bushings with mineral spirits for 4 decades. (Then just covering with grease and reinstalling.)

Never had any problem with premature wear.

As I love to say- Theory and practise are two different things. You've managed to get away with it- I've gotten away with no-no's too. But when it comes to handing out advice, we tend to stick to the known conventions.

_______________________________________________
***Get YOUR official "Doc Locked, And Ready To Rock!" Stickers by clicking here!***
***Official Sprocket's Garage vinyl graphics and tees for sale HERE!***

Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
MULE- http://www.atltf.com/t2153-lawn-boy-utltv
MULEII- http://www.atltf.com/t3328-1970-john-deere-112-the-beginnings-of-mule-ii
MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
Wrench, Wheel, Wreck, Repeat...
Back to top Go down
Angchor
Skilled
Skilled
avatar

Age : 60
Join date : 2014-04-14
Posts : 491
Forum Rep : 0
Location : Index, Washington

PostSubject: Re: General Transaxle Information + Myths   Sat Apr 19, 2014 12:07 pm

@Doc Sprocket wrote:
As I love to say- Theory and practise are two different things. You've managed to get away with it- I've gotten away with no-no's too. But when it comes to handing out advice, we tend to stick to the known conventions.

Understandable.

And in the spirit of that, I should add a caveat.

I would not use carb cleaner, or brake cleaner or any of the harsher chemicals on them. They WILL dry the bushing out.

And I do not let the bushing sit for even the slightest amount of time, in the mineral spirits. I use a brush and a rag, and clean the bushing as quickly as possible.

Plus, this is only for bushings that cannot be cleaned by simply wiping them off with a paper towel, and/or rag.
Back to top Go down
redlinemotorsportts
Moderator
Moderator
avatar

Age : 20
Join date : 2013-03-18
Posts : 3122
Forum Rep : 2
Location : fingerlakes, New York

PostSubject: Re: General Transaxle Information + Myths   Sat Apr 19, 2014 12:21 pm

Is a parts washer OK for bushings?
Back to top Go down
Doug
Webmaster
Webmaster
avatar

Age : 22
Join date : 2012-12-24
Posts : 2618
Forum Rep : 16
Location : 17042, Pennsylvania

PostSubject: Re: General Transaxle Information + Myths   Sat Apr 19, 2014 8:40 pm

I dont think parts washers are as rough as brake cleaner, especially since it recycles crud water.

_______________________________________________
Back to top Go down
Thunderdivine
Grand Master
Grand Master
avatar

Join date : 2012-12-21
Posts : 2082
Forum Rep : 0
Location : Norway, Europe

PostSubject: Re: General Transaxle Information + Myths   Sun Apr 20, 2014 3:35 pm

Bronze Zintered Bushing, you can de-grease, machine (but with clean cuts) and wash in normal stuff, WD40 or something like that.
- To re-impregnate them if you machine them, you can cook them in SAE 30 oil @ 80 degrees celcius for an hour or so.

I've used them aslong as i can remember, we used them in High rev. model boat engines earlier too,
funny thing back then we removed the Needle Roller Bearings and inserted Bronze Bushing, totally the opposite of what Lawn Mower Racers do to the Peerless 700's.

- But quite logicly the roller bearings can fail and do so quite easily, but a well oiled Bronze Bushing don't.

We also drilled oil drain holes and filed oil grooves in them for a more "wet" run.

They work like when they get warm and get friction they release some of that oil they've been impregnated with on normal use.

Many oils can be used to impregnate them, chosen for they're use.

Bronze Zintered Bushing are rated 18000rpm, The Needle Bearings are not. (Tho im not sure how many rpm they handle).

_______________________________________________
*Thunderdivine*
My Custom Racing Mower Build
JD210R - Racing Mower, Sidebuild
My Vintage John Deere 110, 1967 model
"Imagination is more important than knowledge." - Albert Einstein
Back to top Go down
mudman604
Apprentice
Apprentice


Age : 19
Join date : 2014-12-03
Posts : 110
Forum Rep : 0
Location : hudson FL

PostSubject: Re: General Transaxle Information + Myths   Sat Dec 13, 2014 4:07 pm

Is dipping the bushings in gasoline a nono to? I've only done to one tranny though.
Back to top Go down
Doc Sprocket
Administrator
Administrator
avatar

Age : 44
Join date : 2013-04-21
Posts : 2862
Forum Rep : 9
Location : Ontario Canada

PostSubject: Re: General Transaxle Information + Myths   Sat Dec 13, 2014 6:54 pm

@mudman604 wrote:
Is dipping the bushings in gasoline a nono to? I've only done to one tranny though.

Generally a no-no, but Thunder did mention a solution to this:

@Thunderdivine wrote:

- To re-impregnate them if you machine them, you can cook them in SAE 30 oil @ 80 degrees celcius for an hour or so.

_______________________________________________
***Get YOUR official "Doc Locked, And Ready To Rock!" Stickers by clicking here!***
***Official Sprocket's Garage vinyl graphics and tees for sale HERE!***

Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
MULE- http://www.atltf.com/t2153-lawn-boy-utltv
MULEII- http://www.atltf.com/t3328-1970-john-deere-112-the-beginnings-of-mule-ii
MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
Wrench, Wheel, Wreck, Repeat...
Back to top Go down
mudman604
Apprentice
Apprentice


Age : 19
Join date : 2014-12-03
Posts : 110
Forum Rep : 0
Location : hudson FL

PostSubject: Re: General Transaxle Information + Myths   Sat Dec 13, 2014 7:18 pm

OK I'll keep it on mind, that tranny blew because iIddidn't put the tabbed bushings in place! Lol thx
Back to top Go down
Sponsored content




PostSubject: Re: General Transaxle Information + Myths   

Back to top Go down
 
General Transaxle Information + Myths
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» General Transaxle Information + Myths
» Locking a Peerless 633 or Sears high/low no welder moose knuckle method
» Adding grease fittings to extend the life of your transaxle?
» Looking for a transaxle
» Important Information

Permissions in this forum:You cannot reply to topics in this forum
All-Terrain Lawn Tractor Forum :: Technical Forum :: Drivetrain & Brake Tech :: Transaxles and Transmissions-
Jump to: