(800) 853-2651
SHOP NOW

Sealing washers for trans deck SH,SMTA

G

GordoSD

Well-known Member
I just dumped 8 gals of hytran out of my SMTA that was totally ruined by water. It;s time to sseal up those cover plate bolts.
I remeber Randy installed some rubber/metal washers when he redid his trany. I tried Fastenal. and Napa with no luck Fastenal had a sealer washer in 3/8 and 1/2. Napa had the rubber/metal washers in 1/2 and larger. Can't locate any 7/16 sealing washers.

ANyone have a source? Would a 3/8 O-ring work, using no flat or lock washer?

Gordo
 
I think I would use flat nylon washers (from a good hardware shop) The use of Orings would reduce tightening pressure to the point of no gasket seal, or they would smash out.
I think there are two contributing factors:
The shifter needs a boot (CV joint boot slipped on, and clamped at the lever.
Condensation and temp change causing breathing in the void above the fluid. When working them every few days till warm (or more) the heat drives out the moisture. When they become less often used, the become a distillery for water vapor. Ive thought that an oil heater would be good in the plug for use every month or so on a timer. JimN
 
Has anyone ever collected any actual data on water entering the transmission from the bolts and the shifter lever? I don't see how water can get into the transmission past the bolts, since the gasket is a full gasket surrounding the bolts and they are in blind holes (except for a couple in the front which you can seal with gasket cement if you want). Also, there can't be much that gets past the shifter lever as it has to leak past the shaft cover. I think almost all water that collects in these tractor transmissions is by condensation. I live in western Wisconsin and keep my tractors in the shed all the time (they never see rain). I have the same problem with water in the transmission and hydraulic systems every spring after all the temperature cycles of winter. Roger
 
I'm getting ready to put the cover on my SH, what about the paper gasket? Any need for additional sealer with the gasket?
 
The only gasket that I am aware of that needs no sealer is the one for the manifold.
 
If you go to a full line hydraulic distributor there are metal seals available with elastomeric seals(rubber) encased in the metal washer. They are for straight thread adaptors. There are also copper sealing washers.
 
If you go to a full line hydraulic distributor there are metal seals available with elastomeric seals(rubber) encased in the metal washer. They are for straight thread adaptors. There are also copper sealing washers.
 
(quoted from post at 19:20:36 09/09/08) I'm getting ready to put the cover on my SH, what about the paper gasket? Any need for additional sealer with the gasket?
Click to expand...

When those tractors where built it was common practice to use paper gaskets to seal joints. Paper gaskets tend to get brittle with age and eventually some lube will come through the joint. Gasket sealers do not do much to change that since the gasket material is the problem. Coating both sides of the gasket with grease will help keep the gasket pliable and for that reason can extend the life of the gasket. For long term sealing, using RTV Silicone without any gasket will form a seal that will not wick lube through the joint like a paper gasket does.
 
You are not supposed to park out in the rain then there wont be any water to get in the tranny. Cant see why you would have a SMTA then leave it outside.
 
Copper washers as used on the end of hydraulic brake hoses on cars and light trucks. NAPA has em in various sizes. Used em on the two long bolts on the belt pulley gearbox om my M to stop oil seepage. Worked great.
 
I tried some 3/8 O-rings on a couple of the bolts. No washers at all. I could only get about 25 lbs of torque before the rings were about to "pop".

But I am thinking here, that cover is HEAVY, has NOT been removed, perhaps ever, doesn't leak at all now. I imagine if I removed ALL the bolts. it would still be tighter than a rick and be very difficult to pry off there. Do I need much hold down torque on it?

The SMTA IS inside now and will stay that way, as it is now all painted and assembled. With four tractors, and two pickups, A Geo Tracker, Cub Cadet, Honda M/C, Honda 4 Wheeler, snowblower, pressure washer, 6 indoor dog runs, and one pole barn, which has built in domicile, some things just gotta live outdoors.

Gordo
 
You must log in or register to reply here.

Similar threads

R
Step-by-step steering box repair, YM1301D
Replies
0
Views
21K
jtw37-HT
J
D
H WFE nuts
Replies
4
Views
1K
Dean O
D
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top