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Tool Talk Discussion Forum

Clark forklift

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Don A

11-01-2004 10:12:24




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Over the weekend, I purchased a old Clark forklift to use in my shop. Do not have much invested in it, however it does have a couple of problems that I want to fix to make it more useable. The forks settle especially when about two foot off the floor. Is there a checkvalve that is not seating correctly? When I raised the forks all the way up, they stayed for about five minutes before they started to settle. The second question is the carb adjustment on the bottom of the fuel bowl. The screw wants to back out when it is running. Is there a spring or jam nut that is missing that would cause it to do this? Roughly, how many turns should this adjustment be backed out once it is seated to run decent. Thanks for any input or ideas.

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tony weir

11-02-2004 16:57:27




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 Re: Clark forklift in reply to Don A, 11-01-2004 10:12:24  
send me serial no and model and i will get you all the right specs



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NC Wayne

11-01-2004 19:38:33




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 Re: Clark forklift in reply to Don A, 11-01-2004 10:12:24  
The fork settling problem could be either wear in the valve or the piston seal in the lift cylinder, or most likely a little of both. There isn't alot you can do if the valve spool is worn, but it's not all that hard to get the cylinder out and simply put a new piston cup on it. Depending on the age of the lift it may still have the origional leather seal in it like ours did when we first got it. In our case we machined a new piston and replaced the old leather cup with a polypak seal. It still leaks down slowly because of valve wear but it takes it's sweet time doing it now instead of almost instantly to the ground like it first did. As far as the carb problem your right, the adjusting screws usually have some type of tension devise to keep the adjusting screwes from backing out, unfortunately what yours had I couldn't say. As for setting it the "rule of thumb" I've always gone by is typically 1-1/2 to 2 turns out, and play with it from there til it sounds right. Hope this helps and Good luck. Wayne

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Don A

11-02-2004 06:16:12




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 Re: Clark forklift in reply to NC Wayne, 11-01-2004 19:38:33  
Thanks. That was the information I was needing.



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DaveWis

11-02-2004 03:49:57




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 Re: Clark forklift in reply to NC Wayne, 11-01-2004 19:38:33  
If it doesn't have a spring to keep it at your adjustment it may have a packing nut that can be tightened some. If there is a hex fitting the needle goes through try tightening it. If that seems to help snug it a little at a time until it holds the needle where you set it. Hope this helps. Dave



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