National Auto Tools NTB-800

Questions and Answers

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Cameron MorseAug 15, 2025
Why does my National Auto Tools NTB-800 keep asking for more weight?
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  Mckenzie FernandezAug 15, 2025
  If your National Auto Tools Wheel Balancer continues to ask for more weight, it could be due to several reasons. Ensure the machine is properly calibrated. Verify that the wheel parameters are entered correctly, noting that these parameters are not saved when the machine is turned off. Also, inspect the weight sensor board for any broken parts or loose wires.
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elizabeth42Aug 18, 2025
What to do if National Auto Tools Wheel Balancers shows Err 02?
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  Jill TerryAug 18, 2025
  If your National Auto Tools Wheel Balancer displays 'Err 02', it indicates that the rotating speed is too low for the machine to function correctly. You should tighten the drive belt, ensure the spin shaft is tight and spinning properly, and verify that the motor is functioning correctly. Using a heavier wheel may also resolve this issue, as the machine is designed for balancing full-size car wheels.
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Peter SnyderAug 22, 2025
How to fix a National Auto Tools Wheel Balancers that does not turn on?
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  tmullinsAug 22, 2025
  If your National Auto Tools Wheel Balancer does not turn on, it may be due to an error in the electrical wiring. Check the on/off switch and the connection of all wires. Trace the electrical current to identify any breaks or issues.
D
David AshleyAug 25, 2025
Why does my National Auto Tools NTB-800 Wheel Balancers overheat and shut down?
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  Denise MejiaAug 26, 2025
  If your National Auto Tools Wheel Balancer seems to overheat and shut down automatically, the transformer may be overheating, or the power board may be defective. Check the temperature of the transformer when the machine shuts down. If it's extremely hot, replace the transformer. If the transformer is not hot, the power board likely needs to be replaced.
K
kwheelerAug 28, 2025
What to do if National Auto Tools NTB-800 trips the electrical breaker?
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  Joseph MayerAug 28, 2025
  If your National Auto Tools Wheel Balancer trips the electrical breaker, the transformer or power board may be defective. Replace the power board or the transformer to resolve the issue.
B
Brian SmithSep 1, 2025
What does Err 01 mean on National Auto Tools NTB-800?
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  Crystal BowenSep 1, 2025
  If your National Auto Tools Wheel Balancer displays 'Err 01', it means that the guard was not closed when attempting to spin a wheel, or the guard was raised while the wheel was spinning. You can use the system settings to turn the guard control to 'OFF'. Avoid raising or lowering the guard while the wheel is spinning.
B
boothjeremySep 4, 2025
Why National Auto Tools NTB-800 Wheel Balancers shows ccc ccc?
- D
  Debra VelasquezSep 4, 2025
  The 'ccc ccc' error on your National Auto Tools Wheel Balancer indicates that you either attempted to calibrate the machine without adding wheel weights or used a wheel that is either too light or too heavy for the machine.
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Sarah StephensSep 7, 2025
How to resolve ERR CAL on National Auto Tools Wheel Balancers?
- R
  Rebecca MaciasSep 7, 2025
  To resolve the 'ERR CAL' error on your National Auto Tools Wheel Balancer, follow the calibration steps.
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Logan Howard MDSep 12, 2025
What does Err 03 mean on National Auto Tools Wheel Balancers?
- S
  Sarah BurnettSep 12, 2025
  The 'Err 03' error on your National Auto Tools Wheel Balancer occurs when using a 3-phase motor. Adjust the three-phase wires to resolve this issue.

Summary

The NTB-800 is a wheel balancing machine designed to accurately balance vehicle wheels. It is essential to read the manual thoroughly before operation to understand safety instructions, system settings, wheel parameter input, and calibration procedures.

Function Description

The primary function of the NTB-800 is to measure and correct imbalances in vehicle wheels. It offers various balancing modes to accommodate different wheel types and balancing requirements.

Standard Dynamic Mode: This mode is used for balancing steel wheels by placing clip-on weights on both the inside and outside of the rim.
Static Mode: In this mode, the machine balances the wheel by placing weight only on the outside of the rim. It is activated by pressing the DYNAMIC/STATIC MODE KEY.
ALU1-3 Modes: These modes are designed for rims that do not accept clip-on weights on one or both sides, typically aluminum wheels or those requiring stick-on weights. The display screen's STICKING AND CLAMPING WEIGHT POSITION INDICATOR guides weight placement.
ALUS Mode: This is the most accurate mode for using stick-on weights. It requires the user to enter four specific parameters for precise balancing.
OPT Mode: This mode is used in conjunction with tire manufacturer instructions for matching tires to the correct rim.
Motorcycle Mode: This mode requires a special motorcycle adapter (purchased separately) to mount the wheel. Balancing is performed similarly to dynamic mode after entering three parameters.

The machine provides visual feedback through display windows for inside, middle static, and outside unbalance, as well as indicators for sticking and clamping weight positions, split/hidden weights, and measurement units (mm/inch).

Usage Features

The NTB-800 is designed for ease of use with a comprehensive control panel and intuitive settings.

Control Panel: The control panel features keys for:

Wheel Parameters Input and Shift
Up and Down navigation
Enter
Dynamic/Static Mode
ALU Mode
OPT/HID (Split/Hidden weight)
Measurement Unit
Start
Motorcycle Mode
Fine Measurement
Stop

System Settings: Users can customize various system settings to suit their needs. To access system settings, hold down the "ENTER" button. Settings include:

Guard Control: Enables or disables the safety hood interlock, preventing the wheel from spinning if the hood is open.
Standardization Display: Sets the display multiple for weight measurements (e.g., 1g or 5g for grams, .10 Oz or .25 Oz for ounces).
Least Unbalance Value: Defines the minimum unbalance amount that will be displayed; amounts below this setting will show as "0." This helps in ignoring minor imbalances that may not significantly affect performance.
Buzzer Switch: Turns the buzzer sound prompt on or off.
Width Input Unit: Sets the unit for width input (inch or mm).
Diameter Input Unit: Sets the unit for diameter input (inch or mm).
Unbalance Unit of Measurement: Selects between grams ("Gr") and ounces ("OS") for displaying unbalance.

Settings are navigated using UP and DOWN keys, and changes are confirmed with the ENTER key. Saving changes is done by pressing the WHEEL PARAMETERS INPUT AND SHIFT KEY, while exiting without saving uses the STOP key.

Wheel Parameters Input: Before balancing, wheel parameters must be entered. For Dynamic, Static, ALU1-3, and Motorcycle modes, three parameters (A, B, D) are required.

Parameter A (Distance from Balancer): Measured using the built-in ruler, extended to the rim's edge. The measurement is multiplied by 10 (e.g., 8 on ruler becomes 80) and entered.
Parameter B (Rim Width): Measured using the provided plastic caliper. The exact caliper reading is entered.
Parameter D (Rim Size/Diameter): Measured using the plastic caliper. The exact caliper reading is entered. For the NTB-800 model, parameters A and D can be automatically entered by pulling the ruler from the side of the machine and touching its end to the under lip of the rim. If the machine is turned off, these parameters are forgotten and must be re-entered.

Calibration: Calibration is crucial for accurate balancing and must be performed if the machine is moved, unplugged, or loses power. A 14 or 15-inch steel rim with a tire is required for calibration. The process involves:

Entering wheel parameters.
Accessing calibration mode by holding FINE, then ENTER, then releasing FINE.
Pressing and holding ENTER, then FINE, then releasing ENTER.
Pressing and releasing ENTER once.
Spinning the wheel with the hood closed.
Rotating the tire until all 5 lights in the OUTSIDE UNBALANCE POINT are on.
Placing a 100-gram (or 3.5-ounce) weight at 12 o'clock on the outside of the rim.
Spinning the wheel again.
Removing the weight.
Rotating the tire until all 5 lights in the INSIDE UNBALANCE POINT are on.
Placing a 100-gram (or 3.5-ounce) weight at 12 o'clock on the inside of the rim.
Spinning the wheel again. Successful calibration is indicated by a "SAU SEE DRE" screen, after which the machine returns to the initial balancing screen. Failure to place weights during calibration will result in an error ("CCC CCC CCC").

Balancing Process: After calibration and parameter input, balancing involves:

Placing the wheel on the machine.
Closing the hood and spinning the wheel.
The machine displays the required weight for inside and outside.
Rotating the tire to align with the OUTSIDE UNBALANCE POINT lights.
Placing the specified weight on the outside of the rim.
Spinning the wheel again to confirm zero balance on the outside.
Rotating the tire to align with the INSIDE UNBALANCE POINT lights.
Placing the specified weight on the inside of the rim.
Spinning the wheel again to confirm zero balance on both sides. The FINE button can be used at any time to display the exact unbalance value, even if the "least unbalance value setting" is ignoring minor imbalances.

Maintenance Features

The manual provides guidance on troubleshooting common errors, which can be considered a form of user-level maintenance.

Error Codes and Solutions:

"ccc ccc ccc": Indicates measurement beyond range, often due to incorrect calibration (no weights added) or a wheel that is too light or too heavy for the machine.
"OFF OFF": Appears if the STOP button is pressed while the wheel is spinning, or if the guard was not closed/raised during a spin attempt. Solution involves adjusting guard control settings or ensuring the guard is properly used.
"Err 01": Guard not closed or raised during a spin. Solution is to adjust guard control settings or ensure proper guard usage.
"Err 02": Rotating speed too low. Solution involves tightening the drive belt, checking spin shaft tightness, ensuring motor function, or using a heavier wheel (machine is designed for full-size car and truck tires, not ATVs or smaller).
"Err 03": Incorrect rotation direction, typically with a 3-phase motor. Solution is to adjust the three-phase wires.
"ERR CAL": Machine not calibrated. Solution is to follow calibration steps.
"ERS CAL": Factory Maintenance Error. Contact the manufacturer.
"Machine Continues to ask for more weight": Indicates improper calibration, incorrect wheel parameters, or a defective weight sensor board. Solutions include recalibrating, re-entering parameters, and checking the sensor board.
"Machine trips electrical breaker": Suggests a defective transformer or power board. Solution is to replace the power board or transformer.
"Machine seems to overheat and shut down automatically": Points to an overheating transformer or defective power board. Check transformer temperature; if hot, replace. If not hot, replace the power board.
"Machine does not turn on": Indicates an error in electrical wiring. Check the on/off switch, wire connections, and trace electrical current.

General Maintenance Advice:

Install the wheel balancer in a dry and safe environment to prevent damage from moisture or extreme heat.
Use a power surge protector to prevent damage from electrical surges or storms, as the machine does not have built-in surge protection.
Ensure the machine is bolted to the ground if it shakes or moves during wheel spinning to ensure proper function.
Regularly check and adjust system settings as needed for optimal performance.