4620 Engine Heater

Any hints on installing engine heater on 4620?

<img src = "http://jdpc.deere.com/pimages/RWP6/RWP6393________UN01JAN94.gif">

My renter has two 4620's they use for chore tractors, and they start nicely in northern ND with a simple blockheater, installs in the middle of the left side of the engine block.

If it is like the new one I have on my 4230 don't bother. Unless it is plugged in all it will not hardly make the engine warm. It was a real disappointment after using the older tank type on our 3020's and 4020's. I asked for the highest watt they had but maybe they gave me the wrong one? Tom

I would second what Tom Said... if you are going to use it regularly, get the tank style. The in block ones look pretty, but are usually smaller wattage units than the tank style. They will heat the engine block, but it does seem to take longer.

If this is a restored tractor and you want it factory, then go with the in block style. If you do that, the heater comes with a screw and nut that hold the heater in the block. Take that screw and nut, go to the hardware store, and pick out something better quality. The ones supplied strip very easily!!!!! I have twisted them off tightening them, and had one installed by a deere tech pop out on me when the engine was running when the screw failed!!!

The tank ones heat faster, and if you ever have to change it, you can do so quickly by pinching off the hoses with the vise grips and not lose much or any coolant. Much faster and easier than draining the block, removing the element (usually stuck in pretty good if they have been in awhile) fighting with the screw deal, and then refilling the radiator. None of that is much fun on a daily user that had the heater fail, and you are in a cold shed at below zero temps!

Good luck.

Where do you pipe in the tank heaters?

This is an open station.

That is a good question, and perhaps someone on here has a pic of one on a 4620.

If the 4620 has the original engine, there is a drain cock on the left side in front of the starter. Putting a tee in there is a common place to source coolant for the inlet of the heater.

There are multiple places to place the outlet... a plug on the right side of the head is a common one, a plug on the top of the oil cooler (provided this engine has the round oil cooler on the right hand side is another, or a plug near the water pump is a 3rd.

As I said, someone more handy than me with their camera will likely come along with a picture!

(quoted from post at 19:13:20 11/30/16) That is a good question, and perhaps someone on here has a pic of one on a 4620.

If the 4620 has the original engine, there is a drain cock on the left side in front of the starter. Putting a tee in there is a common place to source coolant for the inlet of the heater.

There are multiple places to place the outlet... a plug on the right side of the head is a common one, a plug on the top of the oil cooler (provided this engine has the round oil cooler on the right hand side is another, or a plug near the water pump is a 3rd.

As I said, someone more handy than me with their camera will likely come along with a picture!

Click to expand...

I have seen several where water for an external heater is taken from the block drain port and returned to a fitting brazed in the steel bypass pipe above the waterpump to the water manifold/thermostat housing.