853 Thermostat

[FJRDarksider]

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]

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.

 

[FJRDarksider]

That should work thanks!

 

[wateka]

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

 

[wateka]

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.

 

[solakian]

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]

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.

 

[FJRDarksider]

Thanks for posting the photos and number for the stant replacement! Thats great! Way better price than what Bobcat wants.....

 

[uffda]

What is the thermostat (Napa or Stant) that fits a 743.

 

[wateka]

if you go to:

Bobcat Parts Catalog - Find Diagrams for Your Equipment - Bobcat Company

Locate all parts and component information about your Bobcat equipment with detailed visual diagrams and illustrations with parts numbers and add to your list.

partscatalog.bobcat.com

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.

https://www.oreillyauto.com/

 

[Mitch500]

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.
View attachment 3410

Have you had a chance to run the motor with this Thermostat and verify that it works.

Thank you

 

[wateka]

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