Harbor Freight Tools 91939 User Manual

Aluminum Wheel BalancerAluminum Wheel Balancer

Aluminum Wheel Balancer

Aluminum Wheel BalancerAluminum Wheel Balancer

with Levelwith Level

with Level

with Levelwith Level

91939

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our W eb site at http://www.harborfreight.com

Copyright © 2004 by Harbor Freight Tools®. All rights reserved. No por tion of this
manual or any artwork contained herein may be reproduced in any shape or form
without the express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353

Specifications

:noitcurtsnoC

:eziSbuHretemaiD"2/1-5ot"2:thgieWteN.sbL03.2

:gnileveLdedulcnistloBesaB3:yticapaCthgieW.xaM.sbL231

munimulAtsaCeiD

sgniraeBllaBleetS

leveLelbbuBeyeslluB

:snoisnemiD

"2/1-9:thgieH

"2/1-5:retemaiDesaB

repat"6ot"4/1-1retemaiDrecnalaB

This tool is very useful for balancing wheels with hub diameters from 2 to 5-1/2”. The
bullseye bubble level will tell you immediately whether a wheel is in balance, and will
guide you in placing the appropriate weights (not included) to achiev e balance. This
simple, sturdy tool requires no power , and ma y be used on any hard, le vel surf ace .

Save This Manual

Y ou will need the manual f or the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice
with this manual. Write the invoice n umber on the inside of the front cover . Keep the
manual and invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should al ways be followed
to reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean . Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools in damp
or wet locations. Don’t expose to rain. Keep work area well lit. Do not use
electrically powered tools in the presence of flammable gases or liquids.

3. Keep children away. Children must ne ver be allowed in the work area. Do not
let them handle machines, tools, or extension cords.

4. Store idle equipment. When not in use, tools must be stored in a dry location
to inhibit rust. Always lock up tools and keep out of reach of children.

5. Use the right tool for the job. Do not attempt to force a small tool or
attachment to do the work of a larger industrial tool. There are cer tain
applications for which this tool was designed. It will do the job better
and more safely at the rate for which it was intended. Do not modify this
tool and do not use this tool for a purpose for which it was not intended.

SKU 91939 Page 2

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. K eep proper footing and balance at all times . Do not reach
over or across running machines.

9. Maintain tools with care. K eep tools maintained and clean for better and saf er
performance. Follow instructions for lubricating and changing accessories. The
handles must be kept clean, dry , and free from oil and g rease 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 y ou are doing, use common sense. Do not operate any
tool when you are tired.

12. Check for damaged parts. Bef ore 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 ma y 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 Freight T ools .

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. F or y our 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 m ust 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 wa y . These bolts will be used
to level the Balancer on y our floor. NOTE: F or 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). Inser t 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 the Wheel Balancer relativ e 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 lev el on the Hub Support

Bubble Level (A)

4. Replace the Bubble Level (A) on top of the Hub Support (C).

(C) by adjusting the alignment of the wheel
to the concentric circles marked around 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 mov e 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 bubb le in the Bubble Le v el
(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 the Wheel Balancer will remain on y our 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 Le vel (A) is especially subject to damage. When not in use, remov e
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

#traPnoitpircseD.yt'Q

AleveLelbbuB1
B551x01mtfahS1
CtroppuSbuH1
D01mtuN2
EmottoB1
F02x6mstloBesaB3

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 T OOL 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 THERET O , OR ARISING OUT OF HIS OR HER INSTALLA TION
OF REPLACEMENT PARTS THERETO.

SKU 91939 Page 7