Discussion:
fork lift help

mast goes up ahead of forks
  • Posted 20 Jul 2016 00:56
  • By russ
  • joined 20 Jul'16 - 1 message
  • New York, United States
Showing items 1 - 3 of 3 results.
safety check valve in freelift cylinder most likely
pull out ram and check the valve at the base of ram.
could be sticking
if valve is missing you will need to get magnet and fish out the parts in bottom of tube, order a new valve and snapring (usually in a safety valve kit).
clean out all metal particles
go to return filter in hydraulic tank and check, change filter if metal found and flush out return line.
Pull velocity fuse in primary cylinder on mast, (usually on right side where main line comes in and check for metal particles, if any found change valve and flush lines.

Most of the time i've found that the valve and any metal debris is usually contained in the cylinder tube at the bottom and rarely makes its way past that point.
  • Posted 25 Jul 2016 02:53
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
Lift the mast all the way to the top. If the carriage starts moving up after mast is at full height, the check valve in primary cylinder defective.
  • Posted 23 Jul 2016 02:21
  • By milan_m
  • joined 18 Dec'09 - 15 messages
  • Ontario, Canada
My Email - mmesic@toromont.com
this can be two different problems. First check the carriage roller clearance, make sure you do not have a binding problem. If this truck has a free lift cylinder, you need to check it for external damage to the barrel. If it looks good you need to ds assemble the cylinder and look for a defective check valve. I am not sure if Cat uses a check valve in the base of the ram like many other mfgs. This is the most common problem with Yale and Hyster trucks.
  • Posted 20 Jul 2016 02:11
  • By BREWSKI
  • joined 10 Jan'12 - 1,699 messages
  • Nebraska, United States

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