Grizzly G0759 Test Run & Spindle Break-in, To test run and break-in the spindle bearings

Make sure there are no obstructions around or underneath the spindle.

Do all lubrication procedures highlighted in Lubrication in Section 6: MAINTENANCE on Page 36.

Test Run & Spindle

Break-in

The Model G0704 spindle speed can be set from 50–2250 Rpm. You must follow the proper break- in procedures to ensure the spindle bearings break-in and seat before putting any milling load on the machine.

To test run and break-in the spindle bearings: 1.

2.

3.place the spindle direction selection knob in the "0" (OFF) position and press the emer- gency Stop button (Figure 17)

Spindle RPM

Readout

Emergency

STOP Button

Spindle

Direction

Knob

Variable Spindle

Speed Knob

Figure 17. Test run controls.

4.Connect the mill/drill to the power source.

5. Turn the speed range selector knob to the "L" (low) position (Figure 1 on Page 3) and rotate the variable spindle speed knob all the way to the left (slowest) position.

6.place the spindle direction knob in the "F" (Forward) position. Squeeze the tab on the emergency Stop button, pull it open, then press the green button. The spindle will begin to turn at a low RPM.

Model G0704 (Mfg. Since 08/11)

—When operating correctly, the machine runs smoothly with little or no vibration or rubbing noises.

—Investigate and correct strange or unusual noises or vibrations before operating the machine further. Always disconnect the machine from power when investigating or correcting potential problems.

7.Press the emergency STOP button. The machine should stop.

—If the machine does stop, the emergency STOP button safety feature is working cor- rectly. Continue to Step 8.

—If the machine does not stop, the emer- gency STOP button safety feature is not working correctly. This safety feature must work properly before proceeding with regu- lar operations. Call Tech Support for help.

8.Open the emergency Stop button cover and press the green button to start the spindle.

9.While watching the spindle Rpm readout, turn the variable spindle speed knob until the mill/drill reaches approximately 600 RPM, then let it run for a minimum of 10 minutes.

NOTICE

DO NOT leave the area while break-in pro- cedure is under way. You must be ready to stop the machine if a problem occurs.

10. Increase the speed to 1000 RPM and let it run for another ten minutes.

11.Increase the speed to 2200 RPM and let it run for another ten minutes.

12. Turn the mill/drill OFF.

13.Set the spindle to rotate in the opposite direc- tion, then press the green button and let it run at 1000 RPM for another ten minutes.

NOTICE

Failure to follow start up and spindle break- in procedures will likely cause rapid deteri- oration of spindle and other related parts.

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