Stimmen - 4, Durchschnittliche Bewertung: 4.3 ( )

Hersteller: Hitachi Dateigröße: 308.91 kb Dateiname: 66352737-4623-4c69-b209-6a7622c33c7d.pdf Unterrichtssprache:

These plates protect your fingers from pinching or amputation by moving parts in the air motor. Starting and Adjusting the Pump 1. With the air regulator (E) closed, open the bleed- type master air valve (F). 2. Connect the air hose. 3. Trigger the spray gun (N) into a grounded metal pail, making firm metal-to-metal contact. 4. Open the pump air regulator (E) slowly, just until the pump is running. When the pump is primed and all air has been pushed out of the lines, release the spray gun trigger. With sufficient air supplied, the pump starts when the spray gun is triggered and shuts off when the trigger is released. 5. Adjust the air regulator just until you get adequate flow from the spray gun. Always run the pump at the lowest speed necessary. CAUTION Never allow the pump to run dry of the fluid being pumped. A dry pump will quickly accelerate to a high speed, possibly damaging itself. If your pump accelerates quickly, or is running too fast, stop it immediately and check the fluid supply. If the supply container is empty and air has been pumped into the lines, prime the pump and lines with fluid, or flush it and leave it filled with a compatible solvent. Be sure to eliminate all air from the fluid lines. Use a pump runaway valve (K) to automatically shut off the pump if it starts to run too fast. 6. Read and follow the instructions supplied with each component in your system. 7. If the pump will be unattended for any period of time, or to shut off the system at the end of the work shift, always follow the Pressure Relief Procedure, at the left. 8 306531 Notes 306531 9 Maintenance Shutdown and General Care Flushing WARNING WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8. . Always relieve the pressure when you shut down the pump. . If you are pumping fluid that dries or sets up, flush with a compatible solvent as often as necessary to prevent buildup in the pump and hoses. . After every 40 hours of operation, adjust the packing nut (42) as described on page 11. To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8. 1. To reduce the risk of skin injection, static sparking or splashing, Relieve the Pressure before flushing. 2. Remove the spray tip. 3. Hold a metal part of the gun firmly to the side of a grounded metal pail. Use the lowest possible fluid pressure when flushing. Lubrication The accessory air line lubricator (G) provides automatic air motor lubrication. For daily, manual lubrication follow this procedure: 1. Disconnect the regulator. 2. Place about 15 drops of light machine oil in the pump air inlet. 3. Reconnect the regulator. 4. Turn on the air supply to blow oil into the motor. 10 306531 WARNING WARNING Maintenance Packing Nut Adjustment PISTON PINCH POINT To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8. WARNING Keep your hand and fingers away from the piston when it is moving. As the piston moves into the pump base it can amputate fingers or break tools caught between the moving parts. Note the pinch point shown in Fig. 3. Be sure all air and fluid pressure is fully relieved before adjusting the piston or packing nut to reduce the risk of amputation. NOTE: Perform this adjustment if: (a) material drips steadily from the air motor weep hole, which indicates the packings are too loose, (b) the pump requires more than 50 psi (.345 MPa, 3.4 bar) air pressure to cycle when the gun is triggered, which indicates the packings are too tight, or (c) the pump has been in operation for 40 hours. 1. Relieve the pressure. Follow the Pressure Relief Procedure on page 8. 2. Using a 1/4” nut driver, remove the six screws (24) from one of the muffler plates (20 or 40) and remove the muffler plate. See Fig. 4. 3. Check to see that the air motor piston is at the top of the stroke. If it is not, first read the warning above. Then, while keeping your fingers away from moving parts, apply very low pressure air to the air inlet to move the piston up. Close the air regulator and disconnect the air supply hose. Refer to Fig. 3. 4. Use a 1/4” diameter rod, spanner wrench, or torque wrench to tighten the packing nut. First loosen the nut, then tighten snugly, and finally tighten an additional 1/2 turn (20–25 ft–lbs). See Fig. 5. 5. Replace the muffler cover, and the six screws. See Fig. 4. 6. Reconnect the air line. After the pump is started, it should run at 40 psi (.276 MPa, 2.8 bar) with no load. Startup may require additional air pressure. BASE FLUID OUTLET WEEP HOLE LOCATED OPPOSITE FLUID OUTLET AND IN BOTTOM OF BASE Fig. 3 BASE 20 24 Fig. 4 PACKING NUT 1/4” DIA. ROD Fig. 5 306531 11 Troubleshooting WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on p...

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