Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

Hydrostat lever on AC720/PowerMax

Recommended Posts

Is there anyone out there that could get me a close up picture of the hydrostatic lever system on the AC720/PowerMax? I think mine has been altered in some way. The main level works fine, but the attached "locking" lever does nothing. Also, a picture that shows the neutral safety switch would be great. I have the service manual, but their exploded drawing does not seem to click. My email is mdaft@xta.com. Thank You

Share this post

Link to post
Share on other sites
There is a steel ball that was missing on my AC620 when I bought it. It took me a while to figure out what was causing it to go "full ahead". I had to keep my hand on the lever at all times. It turns out I had two problems. The spring inside the console that provides tension on the handle was broken and the steel ball was missing. I was able to fabricate a new spring from a spring I bought at Fleet Farm (the spring is a NLA part), the balls were still available, at least they were 2 years ago. The ball rides in a tapered groove providing aditional resistance to the movement of the lever. The locking lever releases the ball when you pull back on it. I don't have a good photo of it handy. I hope my description helps make some sense of the exploded drawing in the service manual. Best wishes.

Share this post

Link to post
Share on other sites
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • spi
    • lt-scir
    • SmilinSam
    • smalljob
  • Today's Birthdays

    1. Chris Dunsmore
      Chris Dunsmore
      (28 years old)
    2. Johnny707
      (35 years old)
  • Recent Status Updates

    • thedaddycat

      thedaddycat  »  SmilinSam

      It's in pretty sad shape, but yes I have a yellow plastic cap that I'm fairly certain is what you need. PM me your details and I'll get it out to you.
      · 0 replies
    • Paul M.Murphy

      Paul M.Murphy

      Try this web site for the previous message I reported that did not work for you guys. 
      The message is about a man in Arkansas who builds miniature vehicles out of old refrigerators that are drivable.
      · 0 replies
  • Adverts