can i fit 1600-21 instead of 1400-41 ??

Never say never but it would be very difficult to do.
The rims, hubs, bearings and spindles are not interchangeable.

There are two problems that I can think of, straight up. One - the clearance between the tyres and the gooseneck may be reduced to the point where the tyres hit the gooseneck when turning sharply, and the front axle is pivoting at the same time. The pull scrapers front axles have to regularly turn at 90° to the frame to enable sharp turns.

Two - the increased diameter of the front tyres lifts the front of the scraper and may result in unacceptable changes to the geometry of the bowl operation. This means that the bowl would lower into the ground by a reduced amount, and affect cutting ability.

Well , thank you for your answers.
Old Magnet : our tiredealer confirms that it is not EASY to put these on, but that the tire is standing more round !!!

OzDozer, the two answers you gave me is what i was thinking also what could be wrong.
I toucht that `why didt the Cat people put diferent size tires on 1 machine😕

Is there a chance to find 1400X 21 tires ,
If so i have 2 1600X21 goodyears wich are very good ones.
For me its no problem if this is in the US.

Also still looking for 4 new 23.5X25 GoodYear SGL 2A tires to fitt on a DW6 !!
Regards G i l b e r t

I have just found 😊 used 4 tires 1600-21 GoodYear with rims ,wich i wanted to fit the No60 scraper.
For the front axle iam still looking for 2 1400-21 .
If i can find 1400-21 , is there any interest in the two 1600-21 ??
Gilbert

Now have sandblasted the rims and put the tires in without tube !!😉
Here some pictures from the new and the old tires.

Iam still looking for 2 1400-21 tires.

Hi Gilbert. Wish I could help you. From looking at the bulletin board over the last number of years, my impression is that all those old tires, especially the diamond tread as used on the Cat pans, are virtually impossible to locate. The correct tires make the machine look more authentic. There are a lot of guys who restore old automobiles (and trucks), so the tire companies have a large enough market to justify the cost of manufacturing reproduction tires. But, unfortunately, there will never be a large enough market to manufacture tires for pans. Good luck in your search. Enjoyed the photos! GWH

Coker tire will mold two tires if he has the molds but they will not be cheap.
Years ago the Cokers started buying old molds and stock piling them. I know of one person who had them mold some odd ball truck tire for a restoration and he said they where expensive.
Chuck C

Hi! You could order the 60 Scraper with 16.00 X 21 tires on the front from the factory. The front wheels and axles were modified to mount larger tires. See the attached sheet.
Thanks
Ken