Combines sickle drive pulleys

[big_boy]

I have a 324 header with the SCH sickle and I installed the large drive pulley several years ago and my ground speed went from 3.5 MPH to 5.5 MPH. I cut about 1500 acres of beans with the large pulley with no problems and I would still be using it if I didn't have the new head.

 

[Mark]

You say that there are 3 different sizes of pullys,is this on the wobble boxIJ Also, what are the sizesIJ

 

[80stech]

used a 400 series straight cut for the first time this year. Before harvest I ran the thing to check it out and got quit a bit of knife vibration. Thought about slowing down the knife and asked the dealer if there were any optional pulleys listed. He said not! So before getting carried away I calculated the cutting speed of the knife from the RPM listed in the operator's manual. It works out to exactly 3.5 MPH !! needless to say I didn't bother slowing it down. Does speeding it up make any difference to the vibrationIJ What are the P_n's for the optional pulleysIJ Are there also alternate belt lengthsIJ