Troubleshooting

Facing a problem with your GMT Equipment grapple saw? Take a look at our instruction videos below. Most of the issues can be fixed easily. Please also check the user manual for more information.

If the problem you are facing is still not solved, please do not hesitate to contact us, for instance by send us a short WhatsApp-video (+31 6 22233144) which shows the problem. We will come back to you as soon as possible to help you.

How to adjust pressure settings

How to pressurize accumulator

When pressurizing accumulator or releasing pressure is needed more frequently during normal operation, please check the following items:

  • check tilt cylinder for possible internal leakage
    Pressurize the accumulator, detach the top hose from the tilt cylinder (piston side) and check whether the cylinder is dripping at the connection.
  • check saw cylinder for possible internal leakage
    Pressurize the accumulator, detach the hose on the piston side of the saw cylinder and check whether the cylinder is dripping at the connection.
  • check the nitrogen filling of the storage tank
    Pressurize the accumulator when the pressure difference between "tilt grapple up" and "tilt grapple down" is more than 12 bar. In this case there is not enough nitrogen. Please mount a new storage tank.

How to solve saw blade extends error

When the saw blade does not extend when grapple close is fully operated, please check the following items:

  • check if ball valve on site of saw casing is open
  • check if saw chain is jammed
  • check valve 1 settings

When the grapple saw does not tilt down (grapple is closed and the saw is operated and keeps extended afterwards), please check the following items:

  • check if return oil line is installed in hydraulic line normal grapple-open function
Afbeelding: hydraulic
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