15.Stand away from all the exposed gears on the side of the headstock, and attempt to start spindle rotation. The spindle should not start.

—if spindle rotation does start with the end cover removed, the safety switch is not operating correctly. This safety feature must operate properly before continuing operation. Press the STOP button to turn the lathe OFF, disconnect it from power, and call Tech Support for help.

16.push the STOP button in, move the spindle lever to the OFF position, then replace the end gear cover.

17.lift the chuck guard up—this will activate the chuck guard safety switch. Reset the STOP button and attempt to start spindle rotation. The spindle should not start.

—if spindle rotation does start with the chuck guard in the up position, the safety switch is not operating correctly. This safety feature must operate properly before continuing operation. Press the STOP button to turn the lathe OFF, disconnect it from power, and call Tech Support for help.

18.use the cutting fluid pump switch on the con- trol panel to start the pump, then open the valve. Verify that the cutting fluid flows from the nozzle, turn the pump OFF, then move the spindle lever to the OFF position.

Congratulations! The test run is complete. Turn the lathe OFF and perform the following Spindle Break-Inprocedure.

After the first 16 hours of use, the V-belts will stretch and seat into the pulley grooves. The V-belts must be properly re-tensioned after this period to avoid reducing their useful life. Refer to the V-Belts subsection on Page 79 for detailed instructions.

Spindle Break-In

Before subjecting the lathe to full loads, it is essential to complete the spindle break-in process as described below. This will ensure the best results and maximum life of the precision compo- nents inside the lathe.

The break-in procedure must be performed in suc- cession with the Test Run procedure described in this manual, because many of the test run steps prepare the lathe controls for the break-in pro- cess.

Important: Do not perform the break-in procedure independently from the Test Run section—serious damage could occur to the lathe if the controls are set differently than instructed in that section.

Do not leave the lathe unattended during the Spindle Break-In procedure. If your attention is needed elsewhere during this procedure, stop the lathe and restart the procedure later from the beginning.

To perform the spindle break-in:

1.successfully complete the Test Run proce- dure beginning on Page 26.

2.using the spindle speed levers to set the spindle speed, run the lathe for 10 minutes at each of the spindle speeds, starting at the slowest.

Note: If necessary, refer to Setting Spindle Speed on Page 51 for detailed instructions.

3.use the foot brake to stop spindle rotation, set the spindle speed at 2570 RPM, then use the spindle lever to reverse the spindle rota- tion and run the lathe for 10 minutes.

Model G0740 (Mfg. Since 11/12)

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Grizzly G0740 owner manual Spindle Break-In