Free lift cylinder operation - Technical Troubleshooting discussion in Forkliftaction's forums

Hyster N25XMDR:
Free lift cylinder operation

I am trying to confirm whether or not I have a mast staging problem. The free lift cylinder lifts to within 3/4" of full stroke, then the main lift cyls. start to lift. If lift operation is stopped within a foot or two of main lift extension, the inner rail will drop slowly and extend the free lift cyl. the rest of the way, but the forks don't move. Does this indicate a problem in the free lift cyl. or could this be normal due to cushioning valving inside the cyl. The main lift cyls. were both just rebuilt and there is nothing binding in the mast.

Posted 24 Jun 2011 12:18
Discussion started by kjjfry
Alberta, Canada

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it indicates the cushioning valve or cylinder packing is allowing 'leaking by', and no it is not "normal" and it can be a considerable safety issue, since it removes the "free" from the free lift as it changes the overall height differently than the operator expects.
You should expect to repack the cylinder and replace cushioning valve in the bottom of the first stage ram.

Posted 24 Jun 2011 20:07
Reply by edward_t
South Carolina, United States

"it's not rocket surgery"

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