SECTION 7: SERVICE

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663. Note: Please gather the serial number and manufacture date of your machine before calling.

Troubleshooting

Symptom

Possible Cause

Possible Solution

Machine does not

1.

plug/receptacle at fault or wired incorrectly.

1.

test for good contacts; correct the wiring.

start or a breaker

2.

power supply is switched OFF or at fault.

2.

ensure hot lines have correct voltage on all legs

trips.

 

 

 

and main power supply is switched ON.

 

 

 

 

 

3.

Motor connections wired incorrectly.

3.

Correct motor wiring connections (Pages 57 & 58).

 

4.

spindle switch at fault.

4.

replace faulty spindle switch.

 

5.

Motor windings or motor at fault.

5.

replace motor.

 

 

 

 

 

Machine stalls or is

1.

Machine undersized for task.

1.

use smaller, sharp tools; reduce feed rate; reduce

overloaded.

 

 

 

spindle speed; use coolant.

 

2.

Workpiece not securely clamped to table or

2.

Make sure workpiece is properly clamped to table or

 

 

mill vise.

 

mill vise; use work holding jig if necessary.

 

3.

dull, damaged or incorrect cutting tool.

3.

use sharp and correct cutting tool for operation.

 

4.

spindle speed is incorrect for operation.

4.

select appropriate spindle speed (Page 33 or 35).

 

5.

Motor connections wired incorrectly.

5.

Correct motor wiring connections (Pages 57 & 58).

 

6.

plug/receptacle at fault or wired incorrectly;

6.

test for good contacts; correct wring problems;

 

 

incorrect voltage from power supply.

 

ensure hot lines have correct voltage on all legs.

 

7.

pulley loose.

7.

re-align/replace shaft, pulley, set screw, or key as

 

 

 

 

required.

 

8.

Motor bearings at fault.

8.

test by rotating shaft; rotation grinding/loose shaft

 

 

 

 

requires bearing replacement.

 

9.

Motor overheated.

9.

let motor cool, clean off, and reduce workload.

 

10. Motor at fault.

10. replace motor.

 

 

 

 

 

Machine has

1.

tool holder or cutter at fault.

1.

replace out-of-round tool holder; replace/re-

vibration or noisy

 

 

 

sharpen cutter; use appropriate feed rate and

operation.

 

 

 

spindle speed.

 

 

 

 

 

2.

Workpiece alignment poor.

2.

eliminate workpiece bindings; use vise or clamps as

 

 

 

 

required for proper workpiece alignment control.

 

3.

spindle and spindle clutch are not properly

3.

Make sure the spindle and spindle clutch are

 

 

meshed.

 

properly meshed.

 

4.

Motor or component loose.

4.

inspect/replace stripped or damaged bolts/nuts, and

 

 

 

 

re-tighten with thread-locking fluid.

 

5.

pulley loose.

5.

re-align/replace shaft, pulley, set screw, or key as

 

 

 

 

required.

 

6.

Machine incorrectly mounted to floor or sits

6.

re-tighten/replace mounting bolts in floor; relocate/

 

 

unevenly.

 

shim machine.

 

7.

Motor bearings at fault.

7.

test by rotating shaft; rotation grinding/loose shaft

 

 

 

 

requires bearing replacement.

 

8.

gearbox at fault.

8.

rebuild gearbox and replace worn/damaged gears

 

 

 

 

and bearings.

 

 

 

 

Model G0747/G0748 (Mfg. Since 8/12)

 

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Grizzly G0747 and G0748 owner manual Service, Troubleshooting, Symptom Possible Cause Possible Solution
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G0747 and G0748 specifications

The Grizzly G0747 and G0748 are advanced metal lathes designed for precision machining and versatility, catering to both amateur machinists and professional workshops. These machines stand out in the realm of metalworking equipment, thanks to their robust construction and innovative features.

One of the key attributes of the G0747 and G0748 is their solid cast iron construction, which provides excellent vibration dampening during operation. This enhances stability and precision, crucial for producing high-quality machined parts. Equipped with powerful motors, both models are capable of handling a wide range of materials, from aluminum to harder metals like steel.

The G0747 features a variable speed drive system, allowing users to adjust the spindle speed based on the project at hand. This flexibility is beneficial for tasks that require different cutting speeds, enabling machinists to optimize cutting performance and tool longevity. Its variable speed output ranges, alongside smooth torque delivery, make it ideal for intricate turning operations.

On the other hand, the G0748 includes an advanced digital readout (DRO) system. This feature provides real-time feedback on the machine's position and speed, significantly improving accuracy in measurements during machining tasks. The DRO system allows operators to set precise limits and keep track of their progress, essential for complex projects where exact dimensions are critical.

Both lathes are equipped with a user-friendly interface, making them accessible for beginners while still offering advanced functionalities that seasoned professionals appreciate. They include multiple tooling options, allowing for an expansive range of machining techniques including turning, threading, and drilling.

Moreover, the G0747 and G0748 come with a comprehensive assortment of accessories, such as different types of chucks and tool holders, which further extends their capabilities. The ease of changing tooling and quick setup times are significant advantages for shops aiming for efficiency and versatility in their operations.

In conclusion, the Grizzly G0747 and G0748 metal lathes are exemplary units that balance power, precision, and user-friendliness. Their advanced features, such as variable speed capabilities and digital readouts, equip machinists with the tools necessary to produce exceptional work. Whether for hobbyists or industrial applications, these lathes are built to meet a variety of machining needs with impressive performance and reliability.
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