Ford 800 Thermostat

Coyote Green · Oct 1, 2012

I was wondering if anyone has any advice on replacing a thermostat on a Mobility Big Dipper loader, this has the Ford Industrial 172ci engine, i believe this engine to out of a Ford 800 tractor?
I just got this loader, i got it running but it's running hot, everything seems to be working so my best guess is the thermostat is bad. I got a replacement and i got everything apart just to find out that the thermostat is gone? i was wondering which way the thermostat faces?
I also noticed that there is a little brass/copper piece on the edge that moves, but when i go to put the thermostat in, the little piece doesn't fit right and if i tighten it it will get smashed?
Does anyone have any ideas?
Thanks for any info

Doug (OH) · Oct 1, 2012

Hey, Coyote, the end with the "pellet" faces toward the engine (where the fluid circulates from)since it's the part that senses the heat. From what I can gather, the looseness is designed to let air escape so that you don't get a vacuum in the system (unless maybe you just have the wrong part) Learned it here! HTH, Doug

Bret4207 · Oct 2, 2012

Running hot w/no t-stat could be a bad water pump or clogged water jacket. More likely the radiator is full of gunk or the fins are loaded with dirt.

showcrop · Oct 2, 2012

Another bit of advice is to be sure that the stat is set into the recession for it in the head. If it drops out and you tighten the two bolts that hold the elbow you will break the casting.

Coyote Green · Oct 2, 2012

Thanks for the info, i was concerned when i had seen that there was no thermostat, i also noticed that the radiator fluid was really green and i'm starting to wonder if it's just straight antifreeze with no water.
Would this make it over heat? i know on the jug it says to mix half with water.
Thanks for everyone's help and info

souNdguy · Oct 2, 2012

yes.. straight anti freeze is actually worse than a water / antifreeze mix. drain a few quarts of the stuff into a jug and save it for top off fluid.. then add water to the ballance in the machine.

Larry NCKS · Oct 2, 2012

(quoted from post at 07:01:06 10/02/12)
Another bit of advice is to be sure that the stat is set into the recession for it in the head. If it drops out and you tighten the two bolts that hold the elbow you will break the casting.

The recession is in the thermostat housing rather than the head on my prior 4000. I just put a thermostat in it last week. I got it from Carquest and it included a gasket that had adhesive on the housing side.

I'm not sure what the little thing is that sticks out and will get crushed is in the OP.

Coyote Green · Oct 2, 2012

Thanks for everyone's info, i got the thermostat in and i drained all of the fluid. I flushed out the whole system, the fins in the radiator were clean, and the pump is working. I filled the whole thing full of water because i didn't want to waist new antifreeze if i had to drain it. So far it seems to stay cool.
I will drain the water and mix half water and antifreeze like it should be.
I wounder if it wasn't the antifreeze the whole time?
Thanks for the help

Bret4207 · Oct 3, 2012

Antifreeze has lube in it for the water pump. With straight water you'll eventually wear the pump out. Of course the pump will wear out eventually any way.

Ford 800 Thermostat

Coyote Green

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Doug (OH)

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Bret4207

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showcrop

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Coyote Green

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souNdguy

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Larry NCKS

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Coyote Green

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Bret4207

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