John Deere Gator HPX heater: John Deere Gator  -- Utility ATV Discussion Forum and Review John Deere Gator HPX heater: John Deere Gator -- Utility ATV Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > John Deere Gator Forum

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 01-11-2009, 12:05 Post: 159308
wlhedges



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 John Deere Gator HPX heater

I correctly installed a John Deere Gator HPX heater (9ph20s30)on my machine, the problem is the air doesn't really get that hot, anything I can do to fix this problem?






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 01-11-2009, 12:16 Post: 159310
candoarms



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 John Deere Gator HPX heater

Wlhedges,

I know nothing about your particular heater, but I have a lot of experience with heaters failing to put out enough heat during the winter months.

Is your heater connected to the coolant lines in the radiator? Is your engine temperature gauge running a bit on the cool side, as well? If so, this is a very common problem.

The extremely cold air passing through the radiator will prevent the coolant from getting warm enough to provide adequate heat in the passenger compartment. Blocking off some....or most....of the air passing through the radiator will greatly aid in passenger compartment heating.

Joel






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 01-11-2009, 12:45 Post: 159311
candoarms



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 John Deere Gator HPX heater

Wlhedges,

I found the installation instructions for your cab heater. Just as I thought.....the heater is supplied with engine coolant from a "T" placed in the top radiator hose.

In order for your heater provide adequate heat, it's going to need a good supply of warm coolant. The problem is most heaters installed in the radiator hoses provide coolant that has already been cooled by the outside air.....greatly reducing the temperature of the coolant flowing through your cab heater.

Place a piece of cardboard or sheet metal ahead of your radiator. Cut a small hole in the center of it, allowing only a small amount of air to flow through your radiator. This will increase the engine coolant temperature, and also the heat available to the cab heater.

Once you do this, it's HIGHLY IMPORTANT that you watch your engine temperature gauge on a routine basis. If you're working your machine hard, you may find that your engine will begin to get hot. Also, when the outdoor air temperature increases, you'll find that the engine temperature may rise significantly.

The increase in cab heat is well worth the extra glances at the gauge.

Joel








Link:   John Deere Cab Heater Installation 

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 01-11-2009, 12:58 Post: 159312
wlhedges



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 John Deere Gator HPX heater

This type of heater is connected to the radiator hose, and the other hose goes to the sending unit adaptor on the engine, seems to me the way this thing is engineered all your doing is bypassing the thermostat,which don't open unless you close the in-line shut-off valve on the heater hose.I think this heater gets it's supply from the engine coolant.






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 01-11-2009, 13:59 Post: 159314
candoarms



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 John Deere Gator HPX heater

Wlhedges,

You haven't bypassed the thermostat. You've simply installed another radiator, in parallel, with the existing one.

Essentially, what you've got now, is an HPX with two radiators in it. The addition of the heater core is going to remove a lot more heat from the engine cooling circuit.

Somehow you need to increase the overall temperature of the coolant. The fastest, cheapest, and easiest way to do this is to install something in front of the radiator, in an effort to limit the amount of cold air that passes over your engine's radiator.

Cut a piece of cardboard and place it directly in front of your radiator. Try it. I guarantee you that you'll notice a big improvement in cab heater performance.

Joel






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 01-11-2009, 14:12 Post: 159315
candoarms



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 John Deere Gator HPX heater

Wlhedges,

I should mention another trick........ for anyone who cares.

During the hot summer months, (the cardboard has been removed) your HPX may run a bit hotter than you'd like. You can help cool your engine better by turning on the cab heater full blast.

The additional radiator in the circuit will help cool the engine better......but it's miserable for the operator!

This trick also works for pickups that tend to overheat while pulling a heavy load during the hot summer months.

Joel






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