(Model 31-731) PART NO. 420-01-651-0013 - 05-28-03 Copyright © 2003 Delta Machinery To learn more about DELTA MACHINERY visit our website at: www.deltamachinery.com. For Parts, Service, Warranty or other Assistance, please call 1-800-223-7278 (In Canada call 1-800-463-3582).
SAFETY GUIDELINES - DEFINITIONS This manual contains information that is important for you to know and understand. This information relates to protecting YOUR SAFETY and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the symbols to the right. Please read the manual and pay attention to these sections. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. FOR YOUR OWN SAFETY, READ THE INSTRUCTION MANUAL BEFORE OPERATING THE MACHINE. Learning the machine’s application, limitations, and specific hazards will greatly minimize the possibility of accidents and injury. USE CERTIFIED SAFETY EQUIPMENT. Eye protection equipment should comply with ANSI Z87.1 standards, hearing equipment should comply with ANSI S3.
ADDITIONAL SAFETY RULES FOR ABRASIVE FINISHING MACHINES FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. DO NOT OPERATE THIS MACHINE until it is completely assembled and installed according to the instructions. A machine incorrectly assembled can cause serious injury. 2. OBTAIN ADVICE from your supervisor, instructor, or another qualified person if you are not thoroughly familiar with the operation of this machine. Knowledge is safety. 3.
POWER CONNECTIONS A separate electrical circuit should be used for your machines. This circuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cord is used, use only 3-wire extension cords which have 3prong grounding type plugs and matching receptacle which will accept the machine’s plug.
3. Grounded, cord-connected machines intended for use on a supply circuit having a nominal rating between 150 - 250 volts, inclusive: If the machine is intended for use on a circuit that has an outlet that looks like the one illustrated in Fig. C, the machine will have a grounding plug that looks like the plug illustrated in Fig. C. Make sure the machine is connected to an outlet having the same configuration as the plug. No adapter is available or should be used with this machine.
FUNCTIONAL DESCRIPTION FOREWORD Delta Model 31-731 is a abrasive finishing machine. The Delta Model 31-731 includes two tilting tables, 4½" arbor pulley, V-belt, 80-grit aluminum oxide belt and 50-grit aluminum oxide disc. UNPACKING AND CLEANING YOUR MACHINE IS SHIPPED WITHOUT BELT TENSION APPLIED TO THE SANDING BELT.
ALIGNING PULLEYS, ASSEMBLING BELT AND ADJUSTING BELT TENSION G F E DISCONNECT MACHINE FROM POWER SOURCE G B Using a straight edge (A) Fig. 6, make certain the motor pulley (B) is aligned with the arbor pulley. If necessary, the motor pulley (B) can be adjusted on the motor shaft by loosening set screw and moving the motor pulley (B) in or out as needed.
OPERATING CONTROLS AND ADJUSTMENTS STARTING AND STOPPING THE ABRASIVE FINISHING MACHINE To start the machine, push “ON” button (A) Fig. 10. To stop the machine, push “OFF” button (B). A B Fig. 10 LOCKING SWITCH IN THE “OFF” POSITION A IMPORTANT: When the tool is not in use, the switch should be locked in the OFF position using a padlock (A) Fig. 11, with a 3/16" diameter shackle to prevent unauthorized use. Fig.
3. Loosen tracking lock knob (D) Fig. 14, and while rotating the belt (F) by hand, as shown, tighten or loosen tracking knob (E) until the belt is running true on the pulleys. E D 4. Then jog the machine on and off to check further if the belt is tracking properly. If the belt is leading to one side or the other, very gently turn the tracking knob (E) Fig.
ADJUSTING POSITION OF SANDING ARM DISCONNECT MACHINE FROM POWER SOURCE. The sanding arm can be positioned in the vertical or horizontal position, or at any desired angle in between as follows: A 1. Loosen two bolts (A) Fig. 18, move the sanding arm to the desired position, and tighten the two bolts. THE SANDING ARM SHOULD NEVER BE REPOSITIONED WHILE THE MACHINE IS RUNNING. Fig. 18 2. When moving the sanding arm to the horizontal position, the arm will contact the stop (B) as shown in Fig. 19.
ADJUSTING TABLE SQUARE WITH SANDING DISC C DISCONNECT MACHINE FROM POWER SOURCE. 1. Place an accurate square (C) Fig. 23, on the table with one end of the square against the disc. A 2. Loosen the table locking knobs (A) Fig. 23, which are located on each end of the table and move the table until it is at 90 degrees to the disc. Then tighten the table locking knobs (A). Fig. 23 3. Adjust the pointer (B) Fig. 25A, so it points to the "0" mark on the scale.
ADJUSTING THE PLATEN B The platen (A) Fig. 24, is set at the factory 1/32 of an inch higher than the crown of the drums (B). This allows the belt, when properly tensioned, to lay flat on the platen and eliminate stretching and bulging which might occur if the platen is not at the right height. When using the machine with a loose belt for "strapping," the platen is removed and replaced as follows: D DISCONNECT MACHINE FROM POWER SOURCE. A C 1. Remove the side cover and top idler drum guard. B 2.
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ACCESSORIES A complete line of accessories is available from your Delta Supplier, Porter-Cable • Delta Factory Service Centers, and Delta Authorized Service Stations. Please visit our Web Site www.deltamachinery.com for a catalog or for the name of your nearest supplier. Since accessories other than those offered by Delta have not been tested with this product, use of such accessories could be hazardous. For safest operation, only Delta recommended accessories should be used with this product.
PORTER-CABLE • DELTA SERVICE CENTERS (CENTROS DE SERVICIO DE PORTER-CABLE • DELTA) Parts and Repair Service for Porter-Cable • Delta Machinery are Available at These Locations (Obtenga Refaccion de Partes o Servicio para su Herramienta en los Siguientes Centros de Porter-Cable • Delta) ARIZONA Tempe 85282 (Phoenix) 2400 West Southern Avenue Suite 105 Phone: (602) 437-1200 Fax: (602) 437-2200 CALIFORNIA Ontario 91761 (Los Angeles) 3949A East Guasti Road Phone: (909) 390-5555 Fax: (909) 390-5554 San Leandro
