[TheMurf]

Guys, On my 12g what would cause oil to accumulate on top of the transmission housing under the seat cowl ? When lift the cowl after using the machine and it has sat for a couple of days there always seems to be dried oil on top of the housing. I do keep the shift arms lubricated, but was wondering if there is something I am missing. Any ideas ? Thank you.

 

[beaner2u]

Is that not where the oil breather for the transmission is located?

 

[WH401]

Is the oil blowing out the top of the dipstick and being sprayed onto the transmission from the engines cooling fan? I had that happen with a 16G, though it was because the engine breather was installed backwards. It could also just be exhaust residue. Not uncommon for the transmissions to get coated in an oily substance after a while. Can't say I've seen many that didn't.

Rick


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[TheMurf]

Thank you gentlemen. My 12G does not have a engine cooling fan or a oil breather that I'm aware of.

 

[WH401]

Thank you gentlemen. My 12G does not have a engine cooling fan or a oil breather that I'm aware of.

The cooling fan is built into the flywheel and it forces air into the shrouds around the engine and out towards the transmission end of the engine, there by blowing most of the air over top of the transmission and everything else past it. The crankcase breather is built into the valve cover behind the carburetor. The trans has an oil breather on top of the fill port just under the seat.

Rick


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[CrazyVet]

How old is the tractor? Seal on dipstick worn? Excessive blow by/tired engine?

 

[Canary Al]

Hey Murf - I have been looking, with no success for an exchange on a thread not long ago. The original poster didn't like the trans breather cap Gravely put in place. The point was made strongly it left the whole transmission open at the top. It is just a very small hole in the cover on the fill pipe

I seem to recall it was PARedRider? Anyway he had come up with a part from McMaster Carr which provided some additional coverage while still being functional - like a single digit $ solution as I recall.

Perhaps adding that might slow this down. Virtually all my riders accumulate oil and as time goes by gunked on oil to accumulate there. Roger is correct the breather is right in that area. Maybe upgrading the breather cover will help?

Perhaps this post will get someone who knows the conversation I refer to can send us to it?

Every 3 or so years, I have been spraying that area with puple power and rinsing lightly. That can all be made to disappear in 15 min.

As long as you monitor the oil levels throughout your machine, all should be allright as this is common.

 

[arcam8123]

Another issue is that the shifter levers coming through the top of the trans-axle have no seals short of a felt washer that can wear out over time. Even if they are intact, you get seepage so the top can get oil coated over time. Some tractors are more prone than others.

 

[TheMurf]

Guys, Thanks again ! The top of my tranny looks exactly like the second picture RonC posted below =

Attachment 1354121..


Can the breather on a 12g Kohler be easily replaced ? The one behind the carb ? I do not see any screw in type on top of the tranny case on my machine. The fan in the back of the engine is fine I replaced the ignition module last season and cleaned out the inside of the engine covers. I also installed a new starter while I was at it.

 

[Canary Al]

I do not see any screw in type on top of the tranny case on my machine. . . . . . . ..

Here's a couple of pictures of what this looks like Murf.

This first one is a shot taken of my 20G (I brought it back from near death) It was during the time I was degreasing it so I could work on it - maybe 4th rinse. Notice the gunk still on the engine. The trans had been covered with a 1/2" of same. Notice how the gunk preserved the engine paint.

The breather tube I circled. It is peaking out from behind that cross shaft.

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Now by seeing this one you can go back to the 20G picture and see what I was pointing out. Ya sorta have to know what you're looking for to see it in that picture.

This is a better angle of it on my 816. All rider trannys have this tube. It is where you ad oil. It has a tiny hole in the top to let the trans breath.

[/URL][/IMG]

 

[TheMurf]

Al , Thank you once again and my personal thanks to the Gravely owners who responded. I do see the breather tube on my machine now that I see the picture. Which part number breather should I order from McMaster Carr ?
The tube on my 12g appears to be that same as the 16g and your 20g, any recommendations ? Thank you again..

 

[rlordjr]

Edit: and here's the link to breather caps at mcmaster:

McMaster-Carr :fing32:

Breather pipe is 1/2 inch. You could keep the pipe nipple and put a female cap on there or remove the nipple and use a male thread cap. More options with male thread it seems.

 

[Canary Al]

Well Ralph you found it I see. Just got back from searching some more.

It was a different poster than I recalled. http://www.mytractorforum.com/24-gravely/376113-another-first-gravely-rider-thread.html

so, at Post #13 last paragraph, he explains his concerns.

And he shows a link to a McMC page – thinking through how to improve the issues.

Don't bother with that link it doesn't get you there. It just happens to be the one Ralph provided above

In post #20 he lays it out with pictures and a McMC part number 9833K27

Here's the link to that part. McMaster-Carr

FYI he talks about it later and shows it installed at Post #41

I meant to ad these to my Riders and probably will now I have located the info again

Good luck with it Pat

 

[arcam8123]

How long is it taking for this oil to accumulate on the top of the trans?

 

[Gravely16G]

Check the oil and see how much is getting away from ya. If it's not a lot, don't worry.
A large oil spot we see on the garage floor is usually not a lot of oil to make it. iow, what you're seeing isn't a problem likely.

 

[TheMurf]

Gentleman, Thank you all for the your help. I ordered a new breather cap from McMaster Carr as referenced below. The oil caking has been there since I can remembered, I always wondered if it was the cap on the tranny tube. I clean it off when I wash the machine. Cut the lawn today and it ran great, hopefully next month I'll be able to add some new tires and the anti scalp front roller I saw a fellow member had at the mow in. I plan on ordering one when I put the new tires on. Thanks you guys for all your help I really appreciate it !!!!

 

[TheMurf]

Re: Any Ideas ? Update

Guys, Thanks, I got the new breather from McMaster Carr and installed it on the transmission. It's much better quality than the original. Haven't ran the machine since last week so I'll have to let you know if it resolves residue on top of the transmission case.


I have another question : How big a deal is it to replaced the forward and reverse drive clutch linings on my 12g rider ? Have any of you replaced them on your machines. I believe mine are riveted on. Any how step by step how to's with pictures better than my shop manual ? Is it a big job ? I'm not have any problems but I figure when I go to put new tires on I might as well replace them.

Thanks again guys !!

 

[WH401]

Re: Any Ideas ? Update

Guys, Thanks, I got the new breather from McMaster Carr and installed it on the transmission. It's much better quality than the original. Haven't ran the machine since last week so I'll have to let you know if it resolves residue on top of the transmission case.


I have another question : How big a deal is it to replaced the forward and reverse drive clutch linings on my 12g rider ? Have any of you replaced them on your machines. I believe mine are riveted on. Any how step by step how to's with pictures better than my shop manual ? Is it a big job ? I'm not have any problems but I figure when I go to put new tires on I might as well replace them.

Thanks again guys !!

That's good that the breather came in, though I don't think it will change much. Residue on the transmission is just the nature of the beast on these tractors.

For replacing the clutch, look at my recent thread, "Failing at Gravely Math..." I just replaced the lining on my 20-G fwd clutch and there's a few pictures. Basically drill the old rivets out, they're 1/8", clean the surfaces of the plates, put the new liner and spacer on, place the rivets in the holes and line the clutch up, get a few small nuts to go around the stem of the rivet to reach down into the clutch lining that'll allow the rivet gun to not dig into the lining, attach the rivets, and that's pretty much it.

Rick


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