View Full Version : Oil Coolers
05-12-2009, 10:04 PM
I am wondering if anyone has experimented with some external oil coolers that have been kicked up a notch or two? I'm in Florida and my ZTR's get HOT. Too hot.
I was thinking of adding a larger oil cooler or two smaller ones and mounting somewhere farther away from the engine. Like for example under the fender or in place of the head lights.
05-12-2009, 11:18 PM
What brand/model units and engines ?
05-13-2009, 12:54 AM
Uhm, I'm not too thrilled with these things, although I realize they are sometimes necessary.
Because they're connected with rubber hoses, granted it's a special hose.
But they can and do bust...
My truck lost 4.5 quarts going down the road because of that.
I fixed it by cutting off the leaking part, then closing the loop with the good part of the hose, bypassing the cooler.
I did have two quarts with me, but even after I added this to the crankcase, nothing showed on the dipstick.
I didn't think I'd make it home, I suppose I should have called a tow truck ($200 + several hours)
But after I fixed it I was still sweating that engine seizing for days after...
Good thing I run synthetic, other than the fact it cost me $30 just in leaked oil.
There is heaps of info on oil coolers fitted to ZTR ,do a search .
In the industrial world coolers are fitted to most systems
Mechanical items only fail from
lack of maintenance
the idiot working on the machine
Coolers can be made by
Long industries [Eaton company] stacked plate no fins
Dixie chopper and kohler use them
There is also a aluminium cylinder with fins .U can get it in different lengths and can be easily mounted [do search ]
Coolers also add increased oil capacity ,so AS well as cooling this also extends its life a little .Therefore at a 70 hr oil change the oil is in better condition and has protected your engine to a greater degree
KUBOTA DIESEL company eg reduces the oil change interval when the oil sump is reduced in size . Obviously this is from the oil being :hammerhead: cycled thru to many times .
The above occurs on the walker diesel . The diesel uses the small sump . When a replacement engine arrives it comes with a manual [interesting reading ]
Walker oil change interval 100hrs
Kubota 50-70 hrs [donot take mower makers word ]
Quart is a few ounces under a metric litre of fluid
kubota large sump 3.6 ltrs
kubota small sump 3.1 litrs
Using above info this puts eg kohler oil capacity to shame :dizzy::dizzy:
[kohler 2 quarts ]
This is why in difficult conditions the oil is then totally abused .
The oil out of my gas walker drained out at 50-70 hrs was very very tired :sleeping: Adding a cooler rectified this
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