VALVE 5436723 - Caterpillar

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When you are cutting in adjacent strips, adjust the skid (5) to the 0 (Zero) position. The skid should slide on the surface that was previously cut. The skid (4) should be set to the cutting depth that is desired.
During any period of operation, check the cutting bits every 1 hour. Failure to keep the cutting bits in a good, free rotating condition will affect the overall performance. The cutting bits must be able to turn freely by hand. (Note, always wear protective gloves the cutting bits will be hot after operation). If the cutting bits do not rotate, remove the affected bits and clean the bits. Some operators keep spare cutting bits soaking in a suitable container of lubricating fluid for quick changes.
Cutting bits that are damaged or missing, must be replaced immediately. Performance of the planer will be reduced and damage may extend to the bit holders or the drum if the cutting bits are not replaced. Refer to the following bit wear examples for additional information:
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(a.) Features of an ideally worn tooth
The remaining part of the carbide tip is shaped symmetrically. The body has a uniform, tapered shape. The body has enough bulk to support the carbide core. Bit is worn and needs replacing.
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(b.) Cutting Bit that has worked on soft materials
If a bit has been used on an overly soft material, the body will wear quicker than the tip. The tip will end up snapping off. Additionally, the altered bit shape will increase bit holder wear. Bit is worn and needs replacing.
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(c.) Cutting bit that has not been rotating properly
The bits that are subject to uneven use, will wear out fast. Usually, wear of this kind is due to the bits not free rotating in the holders. The wear may be due to a worn tooth holder. Wear may also be the presence of debris material between the shank of the tooth and the seat in which the tooth is fitted. In this instance, clean the seat and lubricate with fluid. Tooth is worn and needs replacing.Note: The above bit examples are for the standard Asphalt Bits. The same principles apply to all bit types.
Any damaged or worn bit holders must be replaced. Contact your Cat dealer for complete information on this process.
When operating the planer, be aware of all obstructions such as drains, manhole covers and other steel obstructions. These types of obstructions are the biggest cause for bit and drum damage.
Check the depth skids for wear. If the skids are worn, the cutting depth scale may be affected. Perform a short test for cutting depth. Set the depth skids so that the cutting bits are almost touching the surface to be cut. Adjust the depth scales for both the left and the right side according to the 0 ((zero)) position depth settings.
Always make cuts in a straight line. Do not make cuts around tight curves. Stop the cut and lift the planer. Reposition the host machine and the