bolt size

[Johnneypopper]

hey all
i built a roller cariere for my 420 and each side is made to bolt on to the cross members but im stumped on the bolt size for the cross members 3/4 is to small and 7/8 is to big thats thread size the only standard size would be 13/16 wich i cant get any help would be great

[Lu47Dan]

My parts manual list the jam nut for the bottom rollers as a 3/4 and the bolts that bolt the roller to the track frame as 1/2 " . If you are talking about the Idler wheel it lists them as same .
TIP ALERT : If you are having trouble determining a shaft size use open end wrenches to measure the diameter of the shaft . Nuts and bolts are measured across the flats not corner to corner .
Hope this helps . Dan

[Johnneypopper]

thanks dan
actually i was talking about the receiving holes on the ends of the cross members i had to retap them and they are 7/8 what i did was weld up a set of press drill wheels and bolted them to the cross members so im able to wheel the crawler around move it in and out of the way as needed