Allsaw AS175 FAQs and Troubleshooting
The Allsaw AS175 can cut:
- Soft to medium hard brick
- Aerated concrete block
While cutting, move the tool and blade in a slow “sawing” motion, which improves the cut rate, reduces concentrated heat build-up and evens the wear on the blades. (See fig.8 & 9)
CAUTION: Do NOT allow the forward or rear end of the blades to hammer onto hard surfaces (shown in figs: 10, 11 & 13) as this will damage the blades and tool. If unintentional hammering occurs, stop the tool or withdraw it from the cut immediately. When using any of the blade types, avoid hammering of the ends of the blades into the ends of the cut by using a slow rocking and sweeping motion. For best performance try to ensure that the teeth are the only part of the blade in contact with the work face.
When using the Mortar Plunge blades, the cut should have enough clearance on each end (shown in fig: 12), to ensure that no hammering of the blade ends occurs (as shown in fig.13).
CAUTION: Take care when setting the tool down to avoid chipping the tungsten carbide teeth.
Changing Blades on the Allsaw AS175. The Allsaw AS175 is supplied ready to use. However in some cases the blades may need to be changed to suit the application. Before changing blades, the guard around the blade mounts must be levered gently out of its groove at the front of the tool and swung away to give access to the cap screws. (See Fig.1) Then use the “Ian key” supplied to loosen and remove the cap screws securing the blades, and remove the blades as shown in fig.2.
Select the correct blades for the cutting task and mount each with their cap screws. Verify that the surfaces of the blade mounts, conrod thread and screws are clean and free of grit or lubricant before fitting. Ensure the guard can be closed before fixing the blades to the conrod (See fig.3).
NOTE: Always use matched pairs of blades. Never mix used blades with new blades. Use only the bolts supplied with the tool. ***IMPORTANT***: Use the “Ian key” (see fig.2), to tighten the blade mounting screws until the torque indicator coil deflects sufficiently so that the sides meet. The “Ian Key” will tighten the bolts to the required 18Nm.
CAUTION: Do not operate the tool if the blades are loose. Operation with loose blades will severely damage the blade mount & bolts requiring repair.
NOTE: Blades are a wearing part. In normal operation, blade life may vary with the hardness of materials cut. Check that the teeth of the blades are lightly contacting, or within approximately1mm of contacting each other (fig.4).
If the gap between the blades is too large, remove and gently bend inward to adjust the gap. Ensure that both blades are aligned vertically to the tool (See fig.4).
CAUTION: If the blades rub against each other anywhere other than within 25mm/1” of the cutting edge, or contact force is high, it is possible to overload the tool and cause premature belt wear.
Swing the guard into its groove at the front of the tool and snap it into place. (See fig.1)
- Make sure to tighten the bolts to the required 18Nm using the Ian key supplied. Please see changing blades section.
- Check that no dirt or lubricant is between the blade and the conrod.
- Check the blade mount holes. If these holes become elongated (evidenced by damage inside the hole from the screw thread) the blades should be replaced. The Blades rely on close tolerances for good operation, any form of deformation of these mounting holes, combined with the hammering motion of the saw, will induce movement which will work to loosen the blade mounting screws.
- Remove blade/s and bend slightly to correct.
- Note: If the blades rub against each other anywhere other than within 25mm / 1″ of the cutting edge, or contact force is high, it is possible to overload the tool and cause premature belt wear.
- Check that all cooling vents are not obstructed by operators hand, debris in vents, or other. Clean as required.
- Check the blade condition. Excessively worn blades can cause overheating. Replace as required.
- Check the clearance between the blades (Please see changing blades section.)
- Check that belt tension is not excessive. (Please see changing belt section.)
- Check that bearings have not failed by removing plastic side cover and belt and rotating both pulleys independently checking for roughness. The power pulley should rotate easily and smoothly. If a bearing has failed contact Arbortech Service Centre.
- Check blade tension, if loose -tighten blade mounting bolts.
- Possible blade failure – replace blade set.
- Leaf spring failure – contact Arbortech Service Centre.
- Gearbox failure – contact Arbortech Service Centre.
- Top handle rubber mounts damaged or worn – replace.
- Teeth worn, chipped or lost. Sharpen or replace blade.
- Check to see if the belt is slipping and belt tension
- This is normal in approximately the first hour that the new tool is operated or if new bearings have been installed. Leakage should reduce and stop thereafter.
- Worn or damaged rubber bushes – replace
With use, the blades will become dull and the cutting performance will decrease. This can be largely restored by re-sharpening the teeth with a fine grit diamond disc.
All Allsaw AS175 blades can be sharpened by hand using the Arbortech 100mm diamond blade that can be used on any suitable angle grinder. Please contact Arbortech to purchase a diamond sharpening blade.
- Using an incorrect cutting action can cause the blades to overheat, melting the solder and releasing the teeth. Please see cutting technique section.
- Material too hard.
- Care not taken in setting tool down on teeth on hard surfaces or loose in tool box.
- Striking metal inside material