Yes 400 and 900 series same part
John Deere part number TY25878.
The OEM Parts Store supplies parts for John Deere mowers. If you contact them and describe the part you need replaces, they will tell you where you can find the part number.
The John Deere 6600 combine was manufactured from 1973 to 1982. It was part of the 00 series of combines produced by John Deere.
You might be able to find this on the John Deere website. There are also ones available with the part that you purchased.
Www.johndeere.com is a good place to look. They sell replacement parts for all kinds of John Deere vehicles and equipment. The best place to buy parts for your John Deere tractor is through your local dealer or https://jdparts.deere.com/ which is their website. www.keepingitgreen.com and www.tractorhouse.com also sell John Deere parts.
Your John Deere dealer would be a good place to start but if they no longer have the part available try the guys in the related link...
A cross reference for John Deere part TY21755 indicates alternative part numbers that can be used in place of the original part. This can include equivalent parts from other manufacturers or different John Deere models that serve the same function. To find specific cross references, it is best to consult a parts catalog, dealer, or online parts database that specializes in agricultural equipment.
The John Deere model Z445 was produced in 2006 and continued until 2010. This model is part of John Deere's line of zero-turn mowers, designed for residential use with features that enhance maneuverability and cutting efficiency.
The John Deere 1800 was produced from 1974 to 1976. This model was part of John Deere's line of agricultural tractors and was designed for various farming tasks. It features a robust engine and was well-regarded for its performance during its production years.
Oil Filter part # is AM107423
I have a model 950 tractor that also uses the same heat sensor switch - ch15516. As far as I know, you cannot use anything but this john deere part. It is about $35 a your nearest Deere dealer.
Try use a Wix instead it's a better filter.M801101 | John Deere | JDR | 33263http://www.wixfilters.com/filterlookup/PartDetail.asp?Part=33263