Cause

• Chain is no longer cutting.

Correction

• Chain must be replaced or sharpened.

Cause

• Cutting bar is bent/warped or burnt.

Correction

• Bar must be replaced.

Cause

• Lack of air pressure in the pneumatic tank.

Correction

• Make sure the gauge returns to 0 when purged and reads 4.6–4.8 MPa (68–70 psi) during operation.

Cause

• Flow control valve on the hydraulic circuit of the cylinder is too closed.

Correction

• Adjust the valve by turning the knob: more towards “–” for easier/faster lowering and towards “+” for slower lowering.

Cause

• Relief valve is too tight on the main hydraulic block.

Correction

• Unscrew the adjustment of the holding valve until the cutting bar lowers by itself, then tighten it just enough to stop it.

Cause

• Squareness is incorrect during the cutting bar descent.

Correction

• Adjust the bearings so that the cutting bar descends perpendicular into the wood.