OutdoorKing Repair Forum Forums Repairs and Maintenance Questions On Ride On Mowers Questions On Ride On Mowers Frames Bolans 160 ST

Can anyone help I have no manual & need to know what oil to put in the Hydrive res and diff assembly

I was mowing on Tuesday got all but a small patch done and it started to loose drive so back to the shed we go by the time I got there it was all but stopped and oil dripping everywhere but cannot see where so I removed the diff & it seems to be coming from & quite wet around the trans free wheel pin
would it be possible its leaking from there is there high pressure in that area

Any help would be good

thanks Jonathan

Hi Jonathan, welcome to Outdoorking.

The answer to your question depends on which transmission you have. It seems there were two or three different hydrostatic transmissions used, and prescribed fluid depends on which one your is. It it the same as the one in this illustration?



Meanwhile, you can get Eaton's general statement on hydraulic fluid requirements here:
http://www.pirate4x4.com/tech/billa...0Hydraulic%20fluid%20recommendations.pdf

Essentially, they are recommending a hydraulic oil, which typically has SAE20 viscosity. They also say you can use engine oil (not multigrade unless you want to have to change it more often) with an API rating but "hydraulic oil" is preferred because it has extra wear resistant additives. A number of aftermarket publications are recommending SAE30 oil. Presumably either approach will work, but only if you monitor the oil closely and replace it fairly often. Incidentally, are you sure it doesn't need to be replaced now?

No what I have is

Mod 1327
Peerless
4172 1074

So the SAE20 or any form of hydraulic oil to be used in the hydrive?

Would I just use a general gear oil in the diff?

Would you know where I can get a sir clip for the end of the axle in side the diff as I did something stupid

That sounds as if you have an Eaton Model 7 hydrostatic unit with a Peerless 1327 final drive unit. Now that I read your first post more carefully, I guess you said that. The Model 7 uses standard hydraulic oil, or in a pinch, SAE20 oil, as I said in the previous post. You said you also need to service the Peerless 1327. You can get a free download of the service manual here:
http://www.wfmfiles.com/download/Tecumseh-Peerless_Motion_Drive_System_-_Transmissions_&_Differentials%28691218%29.pdf

If you refer to Page 8, the lubrication chart, it says all Peerless transmissions that use oil use the same lubricant, SAE EP90, which is about as common a hypoid rear axle lubricant as you can get, so it is as close as your nearest speed shop. The quantity required for the 1327 is 710 ml.

I understand you want to finish your mowing job, which is easily accomplished by topping up the systems with the specified lubricant, but after that is done, you should fix the leaks and change the fluid in the hydro unit. It is a light-duty unit, which is very prone to overheating its oil. When that happens the lubricating properties are permanently compromised, and the fluid needs to be changed.

Ok thanks for that im not worried about the law getting done
What im worried about now is where its leaking & getting the replacement parts

I cannot test it out of the mower to find the leak

Why not remove the cutter drive belt, put the machine up on stands, and let it run unloaded for an hour with the wheel drive engaged? Don't do it with the cutter belt on though, because you'd be trusting the cutter clutch, and that's just not a safe thing to do. From time to time you can take a close look at the drive housings from underneath, and on top as well, to find the leaks.

Not a bad idea the being deck is out of the mower

I was hoping that the is a seal kit for it as I now have to put new seals in the axle tubes

That is a very old final drive unit - I don't think you'll just walk into a repair shop and ask for parts for it. You might try contacting Bruce, the Outdoorking site owner, or the Outdoorking on-line store, and see if they can source something. I've had a quick look around and found very little in the way of Peerless parts, and not even a mention of the 1327, except among enthusiasts/hobbyists.

Most likely you'll be able to replace parts like axle oil seals easily by measuring the inside and outside diameters and the width, then just search for that seal. The same applies to parts like ballraces. If you need shafts or gears though, I think the only possibility may be a wrecked 1327.

Sam's Bolan parts in Indiana for the hard to find stuff