How to maintain

Here you will find the most common instructions on how to maintain your GMT grapple saw. Please check the user manual for more information.

If you are facing any problems during operation, please check the page "How to install" for most common installation and set-up problems. If the problem you are facing is still not solved, please do not hesitate to send us a short WhatsApp-video which shows the problem you are facing. We will come back to you as soon as possible.

Keep checking our website: This page will be updatet frequently based on new developments and frequently asked questions. If you have any, send us an email: info@gmt-equipment.com.

How to execute daily maintenance

The felling grapple must be lubricated in the morning before work commences, or at the end of the day when work is complete. Please note! There are 13 grease nipples.

  • 6 greasing nipples on the 3 cylinders
  • 2 greasing nipples on the reaction arm
  • 3 greasing nipples on the grapple claws
  • 1 greasing nipple on the saw motor. Note! Not with cold weather and not too often. This in relation with the sealings of the saw bearings.
  • 1 greasing nipple on the grapple frame / tilt frame connection
Afbeelding: lubrication

During the lubrication process, check for defective hydraulic hoses, loose bolts, axle play, etc.

This lubrication advice only applies if the felling grapple is subjected to regular use and conditions. In case of heavy use or extreme conditions (high temperatures, dust, etc.), more frequent lubrication will be required. Remove possible snow, ice and dirt before commencing work.

For a complete maintenance schedule on your GTM grapple saw see table below:

Afbeelding: Maintenance schedule

How to refill chain oil

Seen from the front, the chain oil reservoir is located on the right side of the tilt frame. This oil should be replenished when work commences or ends. This small reservoir has a volume of approximately 2 liters.

Chain exchange: Loosen the two M20 nuts using the supplied 30 mm combination spanner. Do not fully remove the nuts from the bolts, but loosen them just enough so that the chain tensioner can be lifted slightly and no longer holds the saw blade. Now, the saw blade can be shifted back to create space to exchange the chain.

Once the new or sharpened chain is in place, it must be tensioned. This can be done by using the supplied flexible hex screwdriver to tighten the bolt in the chain tensioner. Once tensioned, the two M20 nuts must be tightened so that the chain tensioner clamping plate once again holds the saw blade.

When finished the ball valve must be fully reopened. The blade will automatically retract into the saw casing.

Afbeelding: replace sawbar and chain 2

Saw blade exchange: Replacing the saw bar works according to the same principle. Loosen the nuts and remove the chain. In this case, the nuts must be loosened somewhat more to create enough play between the chain tensioner and the saw bar so that the tensioner pin can be removed from the notch in the saw bar. The saw bar can now be pulled out. When inserting the new saw bar, make sure that the tensioner pin is placed back in the aforementioned notch. Once a new or sharpened chain is in place, it must be tensioned. Finally, tighten the locknuts.

When finished the ball valve must be fully reopened. The blade will automatically retract into the saw casing.

WhatsApp