12 POINT MACHINE INSPECTION

IDLER & DRIVE WHEELS

• Items checked / procedure:

– Inspect for flat spots on the wheel surfaces

– Rock wheels side to side for bearing play

• Problems Caused

– Band breakage, blade slip

Guides

• Items checked / procedure:

– Disassemble guides check for cracks and or chips. Carbide guide surface should be higher than surface of the steel holder. Look for excessive wear on the corners of the carbides.

– Bearing type guides should be checked for looseness between the center shaft or post and outer bearing surface. Make sure the bearings turn freely.

• Problems Caused

– Band breakage, crooked cuts, blade vibration.

– Tight roller guides will pull the blade off of the idler wheel. Blade should slip freely between guide rollers.

Guide Arm Aligment

• Items checked / procedure: – Remove blade from the blade

guides, place the blade against the wheel flanges or center the blade on the wheels. The center of the blade should line up with the center of the guide.

• Problems Caused – Blade breakage or cracking.

Scoring of the bladebacking and crooked cutting. CAUTION: Do not perform a guide arm alignment. Report this problem only. Special training is needed to perform this task.

Blade tracking

• Items checked / procedure:

– Inspect the band position on the band wheels, the blade must not ride against the wheel flange. The blade should be positioned so that the largest portion of the blade body is supported by the wheel surface.

• Problems Caused

– Blade breakage and or cracking. Crooked cutting, caused by set damage or blade twist. Wheel damage of flange wear.

Blade tension

• Items checked / procedure:

– Measure tension with tension meter and record. Proper tension for bimetal blade should be between 190 and 210 N/ mm^2.

• Problems Caused

– Blade breakage, crooked cutting, vibration and slippage between the band and the wheel.

Blade speed

• Items checked / procedure:

– Verify proper operation of band speed controls and speed indicators.

• Problems Caused

– Tooth damage, crooked cutting, premature tooth wear.

Chip Brush

• Items checked / procedure:

– Check the condition of the chip brush. Replace as needed if parts are available.

• Problems Caused

– Tooth breakage, rough cutting premature tooth wear.

Coolant Flow

• Items checked / procedure:

– Verify coolant flow from all hoses and ports. Check coolant concentration with a refractometer. Recommend a 10% concentration minimum.

• Problems Caused

– Premature tooth wear, tooth breakage and crooked cutting.

Clamps

• Items checked / procedure:

– Verify condition and operation of saw clamp and feed clamps list problems found.

• Problems Caused

– Tooth damage, crooked cutting, blade breakage.

Stock and Feed System

• Items checked / procedure:

– Verify correct sequence of stock feed system making sure blade is clear of stock during auto feed cycle.

• Problems Caused

– Blade breakage and or tooth damage.

Drive Mechanism

• Items checked / procedure:

– Check condition of all drive belts. List all fluid leaks in drive gear box. Report all unusual gear of bearing sounds. Check for smooth running of all parts.

• Problems Caused

– Tooth damage, crooked cutting

Fluid Levels

• Items checked / procedure:

– Check hydraulic fluid level. Check oil level in all air oilers. Check gearbox oil level.

• Problems Caused

– Erratic operation of saw arm. Improper blade tension. Erratic blade speed control.