Filter maintenance problems can occur during winter months when the temperature of the fuel drops below the cloud point and wax starts to be filtered out. This accumulated wax will eventually dissolve when the fuel heats up and may cause some operation problems such as rough running and black smoke. Winter conditions may require switching to #1 diesel fuel if available. Fuel-Injection Pumps -- There are two basic types of fuel injection pumps: in-line and distributor. (In February, I will explain how a distributor pump operates and discuss some troubleshooting hints). Both powermatic in-line and distributor pumps may include a separate, built-in transfer pump.

Damage to a specimen, or to the air scribe itself, can occur in several ways. mini drill press almost always it is due to operator error. the air scribe is very powerful and quite capable of quickly boring into mineralized bone or shell--with dire consequences. the reciprocating, or in-and-out, movement press of the tool can actually pull the bit through the specimen in a series of millisecond-long bites that can leave the operator in a panic. the secret is to completely familiarize yourself with surface texture, color, and physical properties of both the fossil and the matrix--these are unique powermatic and vary greatly between specimens. let the machine do the work. knowledge of texture and color lets you know when to lighten up and pull away, and, for the most part, the movement of the chisel tip without any help except guidance drill press from the operator is sufficient to reduce matrix to press and powermatic a fine debris. this is perhaps the most difficult technique to learn because it is human nature to think that force from our own hand drill press muscles will make the job faster. quite the contrary, the application of too much pressure only ensures that your lab will be filled with an incessant whining, your air scribe life span will be considerably reduced, and you may snap off fairly expensive chisel bits. in addition, because air scribes are so powerful, the bit should never be used as a lever. it is the reciprocating movement of the tip of the bit that effectively breaks apart the rock matrix. wedging the bit into the rock, twisting, or levering off larger chunks not only breaks chisel bits, but also rapidly transforms your air scribe into a useless press paperweight. with proper care, common sense, and regular lubrication, a pneumatic air scribe will last for years and will enable you to prepare fossils from nearly any matrix. lab technicians are also finding that air scribes enable them to develop fossils in a way never before available to them, bringing out details of specimens impossible with older, more traditional technologies.

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