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thicker oil in my 430 touch o matic

H

harley0427

Member
flushed sytem with kerosene and put all new 5w20 and now leaks alot more than before (out of the rock shaft control arm and from the lift arms themselves) thinking about using 5w 30 or 10w 30, also thought since you dont have the same swing in temp as an engine maybe straight 20 or 30 would be fine. in 1959 JD recomended straight 10. any thoughts????
 
(quoted from post at 06:27:38 08/15/14) flushed sytem with kerosene and put all new 5w20 and now leaks alot more than before (out of the rock shaft control arm and from the lift arms themselves) thinking about using 5w 30 or 10w 30, also thought since you dont have the same swing in temp as an engine maybe straight 20 or 30 would be fine. in 1959 JD recomended straight 10. any thoughts????
Click to expand...

My experience indicates that there is little harm in running 10w30. Seemed to work reasonably well for me. That said, those leaks never seemed to heal themselves on my 430 regardless of the oil attempted :)
 
Back in the day when we used a 430 detergent oils would foam out the breather under the seat.
I would just use hy-gard.
Don't count on any oil to cure your leaks.
There are seal softeners on the market but I have no experience with them. Might be worth a try?
 
Uhh Oo. That can of worms should have been left alone. The kerosene and detergent oil you put in there are washing away the built up layer of oil sludge that was keeping most of the leaks at bay. Good idea if you're going to rebuild everything & bad idea the rest of the time. Better isn't always best when it comes to old Dubuques.

If you want to keep using the tractor as is, the best thing you can do is drain out every drop you can and refill it with plain old 30wt NON DETERGENT motor oil. It works better and leaks less than anything else you can use.

If you replace every seal between the pump and the rockshaft Hyguard would be the way to go. JMO
 
Ditto to M-Man.

Cleaning and flushing the system on my MT Touch-O-Matic with kerosene was what brought up the need to rebuild it for me. I went from a slow leak to multiple leaks.

I run straight 20 weight Non-detergent in mine year round in Massachusetts and operates just fine even in negative temps moving snow.
 

Just for fun, I looked up "Hy-Gard Hydraulic/Transmission Oil" at http://www.deere.com/wps/dcom/en_US/parts/batteries_and_fluids/oils_and_lubricants/hygard_hydraulic/transmission_oil/transmission_oil.page and found:

Viscosity @ 40°C................... 59 cSt
Viscosity @ 100°C................. 9.4 cSt
Viscosity index.................. 140

and the compared with the charts at http://www.bobistheoilguy.com/viscosity-charts/ to find:

SAE motor oil 20wt Viscosity
- at 100°C = 5.60-9.29 cST
- at 40°C = 61.2-74.8
SAE motor oil 30wt Viscosity
- at 100°C = 9.30-12.49 cST
- at 40°C = 90.0-110

So hy-guard, if I am reading the published specs and charts correctly, is a little bit less viscous at 40c then 20wt motor oil and about as viscous as 30wt at 100c.
 
nlastovi
So wouldn't that give you the advantages of a multi-viscosity oil without the disadvantage of detergent oils?
Thanks for doing that research.
 
(quoted from post at 12:40:11 08/15/14) nlastovi
So wouldn't that give you the advantages of a multi-viscosity oil without the disadvantage of detergent oils?
Thanks for doing that research.
Click to expand...

I have little doubt that the hy-guard stuff is pretty good all around. It may be priced that way :) I suspect that it is actually a multi-viscosity (i.e. with VIIs) oil (as opposed to a straight weight) looking at the specs.

But I'm not so sure that there are much in the way of disadvantages of detergent oils. I suspect most of the talk ends up being folk lore (...I (or my buddy/uncle/granddad) did such-n-such and had so-and-so result). The stresses put on the fluid would seem less than those within the engine.

That said, I can see how a 50+ year old system might have seals and bushing and gaskets that warrant repair or replace. And a "thicker" fluid might weep more slowly. And that there could be additives that might make those seals work a bit better for a bit longer.
 
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