Stimmen - 3, Durchschnittliche Bewertung: 4 ( )

Hersteller: Sterling Dateigröße: 2.54 mb Dateiname: Unterrichtssprache:

If the drive belts have to be replaced, follow the procedure in Section 6-2-1 up to Step 6. Then release the belt from tension by fully unscrewing the tie rods. Slip off the belts, and replace them with new ones. Continue with the procedure for adjusting the belt tension. 6-3 Removal and Replacement of the Screen NOTE: A qualified operator/maintenance mechanic should carry out this procedure. 1. Switch the machine off and lockout power by turning the disconnect switch to “OFF”, or remove the fuses from the main control pane. 2. Open the front panel. Text Box: Belt Deflection Guage Text Box: Belt Span Text Box: Deflection = UBeltspanU 64 . The Deflection Force Value shown is for each belt and must be multiplied by the number of V-belt elements if all are deflected. 3. Remove the bin. 4. Remove the screw knob that holds the hopper on top of the cutting chamber. Carefully lower the screen cradle assembly, resting it on the base. Remove the screen, keeping it in a horizontal position. (See 5. Figure 12.) 6. Replace the screen with a new one, tighten the screw knob, reposition the bin, and close the front panel. Unlock the power and turn the machine back on. Figure 12: Removing the Screen 6-4 Inspection and Adjustment of Knives NOTE: This operation must be performed by a qualified operator / mechanical maintenance technician. Important! Before carrying out any maintenance on the cutting chamber, the operator must wear work gloves thick enough to avoid injury to the hands while touching sharp parts or the cutting edges of the blades. To inspect blades, remove the screen by following steps 1-0 in Section 6-3. Then, proceed as follows: 1. Open the rear-closing panel by releasing the locking latch. 2. Pivot the in-feed hopper completely back to gain clear access to the cutting chamber, and clear any process material or foreign objects between the knives. 3. Turn the rotor slowly until the first row of rotor knives are in close proximity to the bed knife cutting edge. Turn the rotor backwards, keeping hands and fingers from directly contacting sharp knife-edges. 4. Using a feeler gauge, measure the gap between the rotor and knife cutting edges. Check each rotor knife to find the “high knife” or the knife that measures the smallest gap. If the gap is substantially greater than the specified 0.006” - 0.008” (0.15 mm – 0.2 mm), the knives need readjustment. 5. Loosen the bed knife shield hold down screws and remove the shield. (See Error! Reference source not found..) 6. Leave the screws that hold the bed knife just tight enough to allow the bed knife to move. 7. Loosen the adjustment screws and lock nuts. (See Error! Reference source not found..) 8. Insert a 0.006” – 0.008” (0.15 mm – 0.2 mm) thickness gauge between the cutting edge of the bed knife and that of the high rotor knife. 9. Adjust the bed knife into the rotor knife using the adjustment screws, so as to leave enough space for the thickness gauge to move. NOTE: Check that the distance between the fixed and rotating knife is the same at both ends of each knife. Move the bed knife using the push adjusting screws a little at a time on each end. 10. When adjustment is complete, tighten the lock nuts on the adjustment screws. 11. Torque the bed knife and bed knife shield bolts to 95 lbs./ft. (13 Kgm., 128 Nm) using a torque wrench. 12. Repeat the steps 4-11 to adjust the rear (or down stroke) bed knife. Turn the rotor slowly for one complete revolution, checking the exact distance between all the rotary knives and the bed knives. 13. Close the hopper and replace the screen and screen cradle, securing them in place using the swing bolt provided. 14. Close the front and rear doors, and unlock the power or replace the fuses in the control panel. Turn the disconnect switch to “ON”. Figure 13: Inspection of Knives 6-5 Removing and Replacing Bed Knives NOTE: This procedure should be performed by a qualified operator / maintenance mechanic. Protective gloves must be worn to avoid injury when handling the cutting knives. To remove and replace bed knives, complete the following procedure: 1. Open the granulator by following Steps 1-0 in Section 6-3. 2. Open the rear-closing panel by releasing the locking latch. Text Box: Rotor Knife Locking Bolts Text Box: Bed knife Adjusting Screws Text Box: Bed Knife Locking Bolts 3. Pivot the in-feed hopper completely back to gain clear access to the cutting chamber, and clear any process material or foreign objects from between the knives. 4. Rotate the rotor so that the rotor knives will not interfere with the removal of the bed knife. Using a wooden block, block the rotor to prevent it from rotating while removing the knives. 5. Loosen the lock nuts and back off the adjustment screws. (See Error! Reference source not found..) 6. Loosen and remove the bed knife shield bolts and remove the shield, positioned above the knife. The remaining bed knife bolts and bed knife may now be removed. 7. Perform the above steps to remove the rear (u...

Herunterladen

Geben Sie zwei Ziffern: