Cat D2 thermostat

[Cysco]

I discovered actually 2 things related to the cooling system while taking the head off my D2. First there is no thermostat in the housing and second there is no "pressure relief spring,etc" under the radiator cap.
I will need some guidence on this as to whether this is okay or do I start the search for the missing parts.

[JasonPayneCrawlers]

I have a cap

[Cysco]

Jason, I have the cap just missing the stuff underneath. Does it come as an assembly ?

[JasonPayneCrawlers]

Not sure I think that I extra springs

[Cysco]

Jason, Let me know as there is only the cap....no springs,seals ,etc
...Thanks, Bill

[TomP-TX]

Cysco, I just replaced the thermostat on my D2 this week. The original part number was a 4F7059 but changes to a 6F9467. There is a brass retainer that goes on top of the thermostat. I had to make a little puller out of a 3/8" bolt and a socket in order to remove it. I think the retainer is still available, but the late model tractors changed the housing and don't use a retainer. Here are some pics that might help. Tom

[josh]

Cysco,
Which style cap do you have? the later kind on the right has no spring just a brass plate and washer, the pressure relief assembly is part of the radaitor, not the cap.

[Cysco]

Josh....I have the one on the right. It is solid brass and a stud from the cap screws into the radiator. There is also a small copper "shim" ,for a lack of a better word, that slides over where the stud from the cap screws in. No other seal,brass plate or washer. Do you have a picture ?

[Cysco]

Cysco, I just replaced the thermostat on my D2 this week. The original part number was a 4F7059 but changes to a 6F9467. There is a brass retainer that goes on top of the thermostat. I had to make a little puller out of a 3/8" bolt and a socket in order to remove it. I think the retainer is still available, but the late model tractors changed the housing and don't use a retainer. Here are some pics that might help. Tom

Thanks TomP...I will make note of the part number and get one.

[josh]

Here is a pic of two, slightly different caps, both used on the late model D2 and similar vintage tractors/ power units, with the same engine, not much more than a big brass plate, a rubber seal and something to hold it together. The one on the left is a 5H4041 and the right is a 5M7591. On the one on the left, the little brass ring goes above the plate.