853 Thermostat

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FJRDarksider

Active member
Joined
Feb 28, 2023
Messages
27
Is there a cross reference guide where I can find an alternative and comparable thermostat for my 853 unit? would prefer not to have to spend $80 for one from Bobcat
 

foton

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Mar 1, 2018
Messages
1,255
Look it up from the engine manf. using the block # or take it out and go to napa and have them match it up, use no colder than 180 degree F.
 

wateka

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Joined
May 25, 2022
Messages
107
Perfect timing - I just took mine out. The date code of October 92 tells me is the original one for my 1993 Bobcat 853. I haven't tested it yet to see if it still works.
82°C/180°F
2-1/8" diameter
Centered design, not offset
Has a jiggle pin
B1F50DBB-1E24-4627-A289-73937F415625.jpeg
 

wateka

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May 25, 2022
Messages
107
One more thing I just noticed - the OEM thermostat (and presumably the one Bobcat sells currently) blocks off the bypass port when fully open. Not sure how big a deal it is if a replacement thermostat doesn't close off that port when fully open. Obviously if a replacement thermostat is too deep and hits the port and cannot fully open, then that is not a good thing.
My not-expensive Harbor Freight caliper says you have 1-1/2" from the thermostat flange to the bypass port.
87A38452-84C1-46FC-B646-80578722F02D.jpeg
0CA8F256-984B-47BC-8F25-95A249A3F45E.jpeg
7FEA4169-C637-4541-A10D-21893A09A06D.jpeg
 

solakian

Member
Joined
May 9, 2018
Messages
7
Blocking the bypass port is CRITICAL. Failure to do so will result in a portion of the coolant bypassing the radiator, even when the t-stat is full open.
 

wateka

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May 25, 2022
Messages
107
Makes sense. I just tested mine and it opens fine, but won't fully close. One replacement I found is Stant 45778 - my local shops don't have one, but it's a whopping $14 on Amazon.
E7513F99-DA9F-4036-8A8C-D78E239A93B7.jpeg
 
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FJRDarksider

FJRDarksider

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Joined
Feb 28, 2023
Messages
27
Thanks for posting the photos and number for the stant replacement! Thats great! Way better price than what Bobcat wants.....
 

wateka

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Joined
May 25, 2022
Messages
107
if you go to:


and put in your serial number you'll get a part number that hopefully will cross reference to something at an auto parts place. O'Reilly has a cross reference lookup option that shows up after you search for a part number it doesn't recognize.

 

wateka

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Joined
May 25, 2022
Messages
107
I just put the cab back on today and started it up - ran for about an hour, so seems to be ok.
 
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