mast falls forward

  • nickbt
  • New Hampshire, United States
  • Posted 1 Nov 2012 10:18 PM
I have been having an issue with the mast going all the way forward by its-self with no load on the forks. When trying to tilt back the engine bogs down and I have to rev the engine up to get the mast to tilt back at all. I had both of the tilt cylinders rebuilt which fixed the problem for a few weeks. I went to tilt the forks all the way forward and then the same problem came back. Then i replaced the valve that controls the lift and tilt cylinders with a brand new one. It looks like one tilt cylinder may be working somewhat and the other one is not. They also seem to be a bit out of adjustment. when tilted all the way back one cylinder goes in about 1/2" farther than the other. This is the cylinder that appears to still be somewhat working. The hydraulic fluid is fairly new and the tank is full. There are no obvious major leaks anywhere in the hydraulic system. Most of the hydraulic lines have been replaced. Does anyone have any idea of what could possibly be wrong? Any troubleshooting help would be greatly appreciated
Showing items 1 - 2 of 2 results.
  • Posted 1 Nov 2012 10:42 PM
Sounds like something is still wrong with one of the tilt cylinders, the one that doesn't seem to be working.
  • Posted 1 Nov 2012 11:20 PM
You need to get back into the tilt cylinders and find which one has the defect.
I agree that the problem may be in the cylinder having the lesser amount of travel on tilt back.
Just a bit of speculation on my part but the unequal travel could be because the piston retention nut is loosening on the cylinder rod. That theory would also account for the excessive drift forward because the oil is bypassing the piston in the piston center bore (not past the piston circumference seal ring).

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Machinery-onQ Listings
Xilin CDD20M
  • XilinCDD20M
  • New - Sale
  • Australia
Brand-Unknown Model-Unknown
  • Brand-UnknownModel-Unknown
  • New - Sale
  • Australia
Xilin CBD30Q
  • XilinCBD30Q
  • New - Sale
  • Australia
Xilin CDD20K
  • XilinCDD20K
  • New - Sale
  • Australia
Unicarriers 2R1F14SU-F16SU-F20SU
  • Unicarriers2R1F14SU-F16SU-F20SU
  • New - Sale
  • Australia
Xilin CBD25T-CBD30T
  • XilinCBD25T-CBD30T
  • New - Sale
  • Australia
Unicarriers 2R1-2R2Y2R1Y2R2L15U.-L18U.-L20U.-L30U
  • Unicarriers2R1-2R2Y2R1Y2R2L15U.-L18U.-L20U.-L30U
  • New - Sale
  • Australia
Unicarriers UFW
  • UnicarriersUFW
  • New - Sale
  • Australia
Xilin CDD15K-II
  • XilinCDD15K-II
  • New - Sale
  • Australia
Xilin CQDH12A-CQDH15A-CQDH20A
  • XilinCQDH12A-CQDH15A-CQDH20A
  • New - Sale
  • Australia
Featured Business
Cascade Corporation (World HQ)
Leading manufacturers of attachments and forks for forklift trucks
Machinery-onQ Listings
Xilin CDD15K-II
  • XilinCDD15K-II
  • New - Sale
  • Australia
Xilin CDD20M
  • XilinCDD20M
  • New - Sale
  • Australia
Unicarriers 2R1F14SU-F16SU-F20SU
  • Unicarriers2R1F14SU-F16SU-F20SU
  • New - Sale
  • Australia
Xilin CBD25T-CBD30T
  • XilinCBD25T-CBD30T
  • New - Sale
  • Australia
Unicarriers UFW
  • UnicarriersUFW
  • New - Sale
  • Australia
Brand-Unknown Model-Unknown
  • Brand-UnknownModel-Unknown
  • New - Sale
  • Australia
Unicarriers 2R1-2R2Y2R1Y2R2L15U.-L18U.-L20U.-L30U
  • Unicarriers2R1-2R2Y2R1Y2R2L15U.-L18U.-L20U.-L30U
  • New - Sale
  • Australia
Xilin CDD20K
  • XilinCDD20K
  • New - Sale
  • Australia
Xilin CQDH12A-CQDH15A-CQDH20A
  • XilinCQDH12A-CQDH15A-CQDH20A
  • New - Sale
  • Australia
Xilin CBD30Q
  • XilinCBD30Q
  • New - Sale
  • Australia