Harbor Freight Tools Saw 91939 User Manual

Aluminum Wheel Balancer  
with Level  
91939  
ASSEMBLY AND OPERATING INSTRUCTIONS  
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyright © 2004 by Harbor Freight Tools®. All rights reserved. No portion of this  
manual or any artwork contained herein may be reproduced in any shape or form  
without the express written consent of Harbor FreightTools.  
For technical questions and replacement parts, please call 1-800-444-3353  
 
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in  
moving parts. Protective, electrically non-conductive clothes and non-skid  
footwear are recommended when working. Wear restrictive hair covering to  
contain long hair.  
7. Use eye and ear protection. Always wear ANSI approved impact safety goggles.  
Wear an ANSI approved dust mask or respirator when working around metal,  
wood, and chemical dusts and mists.  
8. Do not overreach. Keep proper footing and balance at all times. Do not reach  
over or across running machines.  
9. Maintain tools with care. Keep tools maintained and clean for better and safer  
performance.Follow instructions for lubricating and changing accessories.The  
handles must be kept clean, dry, and free from oil and grease at all times.  
10. Remove adjusting keys and wrenches. Check that keys and adjusting  
wrenches are removed from the tool or machine work surface before operating.  
11. Stay alert. Watch what you are doing, use common sense. Do not operate any  
tool when you are tired.  
12. Check for damaged parts. Before using any tool, any part that appears damaged  
should be carefully checked to determine that it will operate properly and perform  
its intended function. Check for alignment and binding of moving parts; any  
broken parts or mounting fixtures;and any other condition that may affect proper  
operation.Any part that is damaged should be properly repaired or replaced by  
a qualified technician.  
13. Replacement parts and accessories. When servicing, use only identical  
replacement parts. Use of any other parts will void the warranty. Only use  
accessories intended for use with this tool. Approved accessories are available  
from Harbor FreightTools.  
14. Do not operate tool if under the influence of alcohol or drugs. Read warning  
labels on prescriptions to determine if your judgment or reflexes are impaired  
while taking drugs. If there is any doubt, do not operate the tool.  
15. Maintenance. For your safety, service and maintenance should be performed  
regularly by a qualified technician.  
Warning:The warnings, cautions, and instructions discussed in this instruction  
manual cannot cover all possible conditions and situations that may occur. It  
must be understood by the operator that common sense and caution are factors  
which cannot be built into this product, but must be supplied by the operator.  
SKU 91939  
Page 3  
 
Unpacking  
When unpacking, please compare with parts list to be sure that all parts are included.  
If any parts are missing or broken, please call Harbor Freight Tools at the number  
on the cover of this manual.  
Assembly  
1.  
Install all three Base Bolts (F) into the Base  
(E) approximately 1/2 way.These bolts will be used  
to level the Balancer on your floor.NOTE: For best  
results, you should use the Balancer on a hard  
level surface, such as a cement garage floor.  
2.  
Thread one of the Nuts (D) approximately  
2” up the Shaft (B). Insert the Shaft (B) through  
the hole in the Base (E) as in the assembly diagram.  
Thread the second Nut (D) onto the shaft, and  
tighten to lock the Shaft (B) onto the Base (E).  
3. Place the Hub Support (C) onto the  
Shaft (B).  
4. Place the Bubble Level (A) onto the  
top of the Hub Support (C).  
5. Level theWheel Balancer relative to your  
floor by adjusting the Base Bolts (F) up  
or down, until the bubble in the Bubble  
Level (A) is centered in the bullseye  
marked in the center of the level.  
SKU 91939  
Page 4  
 
Operation  
1. To operate your Wheel Balancer, first ensure that it is properly assembled and  
level with your floor as discussed above.  
2.  
Remove the Bubble Level (A) from  
the top of the Wheel Balancer to protect it  
from possible damage when placing the  
wheel on the balancer.  
NOTE: Before balancing, remove all  
weights from the wheel rim, and assure  
that the wheel, tire and stem are in finished  
condition as they will be installed on the  
vehicle.  
3.  
Place your wheel horizontally with  
the valve stem up on the balancer with the  
top of the Hub Support (C) protruding  
through the center of the wheel. Be sure  
that the wheel is level on the Hub Support  
(C) by adjusting the alignment of the wheel  
to the concentric circles marked around the  
HubSupport(C).  
Bubble Level (A)  
4. Replace the Bubble Level (A) on top of the Hub Support (C).  
5. The Bubble Level (A) will indicate an out-of-balance wheel by showing the bubble  
out of the center of the bullseye.The bubble will move toward the “light” side of  
the wheel.  
6. Balance the wheel by placing wheel weights of various sizes (not included) on  
the rim side indicated as “light” by the Bubble Level (A). Careful placement of  
weights will result in the wheel being balanced.The bubble in the Bubble Level  
(A) will be centered in the bullseye when the wheel is balanced.  
WARNING: When balancing, only place the weights where they are needed.DO NOT  
hammer the weights in place while the wheel is on the Balancer. This will result  
in damage to the Balancer.Mark the position of the weights, and hammer them on to  
the rim after the wheel has been removed from the Balancer.  
7. Recheck your work after you have installed the weights. Replace the wheel on  
the balancer with the valve stem up. Check to ensure that the bubble is centered  
in the bullseye. If it is not, remove the wheel from the balancer, remove the  
weights from the wheel, and start again from step 3 above. For best results it is  
inportant that your wheels are properly balanced before using them on your  
vehicle.  
SKU 91939  
Page 5  
 
Maintenance  
1. If the Wheel Balancer is to be used only occasionally, you should disassemble  
it and store it in a dry, secure place between uses.  
2. If theWheel Balancer will remain on your shop floor, protect it from damage and  
hard use. It is a precision tool which may be easily damaged by being banged  
around.  
3. The Bubble Level (A) is especially subject to damage.When not in use, remove  
it from the Balancer and store in a safe place. To protect it from accidental  
damage, always remove the Bubble Level (A) from the Balancer when placing  
the wheel on the Balancer.  
Parts List  
Part #  
Description  
Bubble Level  
Q'ty.  
A
B
C
D
E
F
1
1
1
2
1
3
Shaft m10 x 155  
Hub Support  
Nut m10  
Bottom  
Base Bolts m6 x 20  
NOTE: Some parts are listed and shown for illustration purposes only and are not  
available individually as replacement parts.  
SKU 91939  
Page 6  
 
Assembly Drawing  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM  
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR  
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE  
BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR  
THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT,  
THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS  
AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND  
LICENSED TECHNICIANS AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK  
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT  
OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION  
OF REPLACEMENT PARTS THERETO.  
SKU 91939  
Page 7  
 

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