Occasional sticking of feed rollers

[Matthew Arnold]

We have just been borrowing a TW150 from some colleagues down in West Dorset. Appart from the corroded exhaust top it is absolutely brilliant. Last week i noticed that when we had been putting 2-4 inch thick branches through for 20 minutes or so they would fix at about 2 inches apart. So if we put a 1 inch branch thru it wouldn't grab it. I came up with a solution which my colleagues thought was rather clever. Put a 6 inch piece through so the spring goes to full stretch and then it goes back to normal gap. I have greased the sliders and checked them for gunk but they were clean. It has done approximately 6000 hours. Any ideas what would be causing the slider jam?

[Timberwolf Official]

Hi Rangermatt

 

Please check the bolts for tightness on the slider bar to ensure free movement of the slider in the roller box, and parts are not damaged etc..

If you remove the springs the slider should lift to the top and slide to the bottom, the springs are there to give assitance to this action.

With a machine having done 6000 hours it could be that the springs are exhausted and the action of you putting through a 6" log through to fully extend them has the action of increasing the elasticity of them, alternativly it could be that there is some wear in the components and this causes the slider to stick,

The natural gap on a 150 machine is approx 12mm

hope this helps

 

regards

TW Tech Support

[Matthew Arnold]

Cheers. I shall check all the bolts and relevant washers tomorrow morning. Would i need to torque them or would an ordinary spanner to until the are tight enough that there wont any play but enough to allow the slider to move?

[Timberwolf Official]

Hi Again

 

There are no specific torque settings for these bolts but the general rule of thumb is that they are tightened up as follows:-

 

M8 bolts - 17 lbs ft or 23 Nm

M10 bolts - 34 lbs ft or 46 Nm

M12 bolts - 60 lbs ft or 80 Nm

 

If you require new springs our part no. is 18070 and can be purchased through our spares dept.

 

Hope that this helps and solves the issue you have,

 

regards

TW Tech Support

[Matthew Arnold]

Ok cheers TW Tech Support. The chipper is coming up to its yearly service so hopefully the guys can get it out and get it working correctly. But in the meen time i shall tightened the nuts up and see if that has an effect.