My Simplicity power max Overheats: Simplicity  -- Lawn and Garden Tractors Discussion Forum and Review My Simplicity power max Overheats: Simplicity -- Lawn and Garden Tractors Discussion Forum

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 08-19-2009, 10:56 Post: 165101
riddius



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 My Simplicity power max Overheats

I have a simplicity power max 4040 that was handed down to me thru family. i love the tractor but it over heats after about an hour of mowing. My father had replaced all the hoses, and had the pump rebuilt. But yet it still over heats. the transmission calls for type A, F, or Dexron automatic oil. An older farmer buddy of mine said i should replace that with Valvoline vv720, So i did and noticed i could mow for another hour. But even thou i have extended my mowing time to 2 hours now the tractor still over heats. Not only does the "hot" light come on but i can hear and feel the tractor dragging. Is there something im missing?. I blow all debri off the tractor everytime i use it. My father had replaced the original "Onan" iron block engine with a new 22hp Kohler hoping the aluminum engine would keep it cooler. But that didnt help. Does anyone have any suggestions?






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 08-19-2009, 11:19 Post: 165104
kwschumm



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Are grass clippings plugging the radiator or radiator screen during your mowing job? Maybe the radiator/screen needs to be blown out every hour during the job to make sure that airflow is not blocked.






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 08-19-2009, 11:28 Post: 165105
auerbach



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 My Simplicity power max Overheats

I'm sure you're using a proper coolant (not plain water) and the belt and thermostat (if fitted) are OK. For the few bucks, replace the cap; gaskets wear out.

Add a cleaner to the cooling system. After running a bit, bring the rad to a shop for pressure-testing and recoring if necessary. Meanwhile the buildup in the block should have loosened so power-flush it (and might as well replace the belt if the lower hose has to be removed for access).

You can leave the hood off while running it until the weather cools.






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 08-20-2009, 08:49 Post: 165128
kthompson



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Replaced or rebuilt all it sounds like but radiator. My guess is your radiator needs cleaning or rodding out or recoring but a good flush may take care of the problem as auerbach has suggested.






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 08-20-2009, 12:16 Post: 165129
Murf



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I'm pretty sure the radiators not the problem, especially since it doesn't have one. Laughing out loud

This is a big old air-cooled garden tractor.

These machines were known for running hot, right from new, but more so as they got older.

About all you can do is add supplementary cooling, some people have made up shrouds that direct air from 12 volt fans from small cars across the engine, others have even come up with ways to cool the engine, transmission, and sometimes both, oils by pumping them through small coolers intended for auto transmissions (sometimes fan cooled) then back to the sumps.

There are specialty user boards for these machines too, but they all have the same answer, they run hot.

Best of luck.






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 08-20-2009, 12:26 Post: 165131
kwschumm



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 My Simplicity power max Overheats

Quote:
Originally Posted by Murf | view 165129
I'm pretty sure the radiators not the problem, especially since it doesn't have one. Laughing out loud



That explains how they came up with the brand name "Simplicity".






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 08-20-2009, 13:08 Post: 165133
Murf



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Quote:
Originally Posted by kwschumm | view 165131
That explains how they came up with the brand name "Simplicity".



No, it was one of those "one product, many names" deals, sort of like Pontiac, Buick, Chevrolet.

It was also sold under the Allis-Chalmers, Montgomery Ward, Homelite, Duetz-Allis and Walkers brand names. The only real difference was the colour scheme and a few odd options or attachments. They were very well built rugged units. Right up there with Wheel Horse and Gravely.

The early hydrostat drives were pretty notorious for heat problems. Today it's pretty rare to not have some form of cooling system on a hydrostat drive, back then it was almost unheard of.

Lot's of people have as I mentioned devised their own oil coolers for them.

I have a Kubota HST (all wheel steer) rider someone 'gave me' because they couldn't keep it running cool enough, it would all but stop after 20 minutes or so. I got underneath it and all the fins were broken off the nylon cooling fan that is mounted on the input shaft to the HST unit. I replaced the $30 fan and now it won't overheat after 3 or 4 hours of non-stop cutting.

Best of luck.






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 08-20-2009, 13:26 Post: 165135
kthompson



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You know Murf had wondered about it being water cooled but the pump and hoses made me think ok. So that is the hyd pump and hoses being rebuilt and replaced.

When looking for a ZTR mower one I liked and decided against it due to dealership was stopping with it was Bobcat. The reason I like it have a oil cooler on top of the engine where the fan in the engine pulled air over it. I would think if room is there you could find an oil cooler with fan unit that could be installed for this.






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 08-20-2009, 15:11 Post: 165137
Murf



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The problem isn't finding a place for an oil cooler, they just weren't equipped with one when made, so it's a home-brewed solution to make one from scratch.

Some of the early ones didn't even have a way or place to tap into the oil supply to send it through a cooler, the transaxle is a completely self-contained unit. The only way to do it is to either drill a pair of holes in the case and tap in fittings or make an external wrap of tubing which is then filled with some other type of coolant.

This unit seems to be one with some external lines for something, so in theory (if the pressures aren't too high) a cooler could be installed in the return line.

Luckily these things are only marginally under cooled so it doesn't take a lot of heat dissipation to solve the problem.

Best of luck.






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 08-20-2009, 17:34 Post: 165140
kthompson



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Murf, seems like without knowing what kind of clearance there is you could mount a 12 volt fan to blow on the pump and that might solve the issue.






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Discussion Boards > Active Subjects > Messages as Posted > Simplicity Forum

Thread 165101 Filter by Poster:
auerbach 1 | gearhead3 1 | kthompson 4 | kwschumm 2 | Murf 5 | riddius 9 |

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