![]() With the dash removed for access, remove the adjusting bolt, spring and washers (Photo 2). If adjusting the friction disk pressure does not cure your problem or if the friction disk is just plain worn out, you can easily replace it. If your friction disk is still serviceable, you can tighten the adjusting bolt, which will increase the pressure against the friction disk and hopefully cure your issue of the throttle lever not staying where you put it. ![]() On this John Deere 70, we can simply remove the four dash bolts to gain access to the adjusting bolt located on the back side of the throttle lever (Photo 1). In this case, the friction material was worn away and no amount of adjusting would hold the throttle lever where you wanted it to be. If your throttle lever won’t stay at the position you want it to, your first step is to try and adjust the spring tension on the friction disk to see if that will cure your problem. After decades of use, these friction disks will eventually wear out and the throttle will no longer stay where we set it. On the Waterloo numbered tractors, a friction disk was used to keep the throttle lever in the position we wanted it to be and hold the engine speed we wanted. But we get used to having things nice and working properly, so when something doesn’t work like it should, some of us find it annoying. I’ve heard some say as long as it runs good, don’t whine and that is true. Sometimes just little things can reduce the joy we get from our tractors, like a throttle lever that won’t stay in the position we want.
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