10-03-10-001B

File in Section:
Bulletin No.:
Service Bulletin
Date:
03 - Suspension
10-03-10-001B
June, 2013
INFORMATION
Subject:
Revised Wheel Balancer Mounting Instructions (Heavy Duty Models Only)
Models:
2011-2014 Chevrolet Silverado 2500HD-3500HD
2011-2014 GMC Sierra 2500HD-3500HD
This bulletin is being revised to add the 2014 model year and a reference to a new style wheel
adapter. All personnel who are responsible for Tire and Wheel Assemblies or Vibration
correction should be made aware of this bulletin and its contents. Please discard Corporate
Bulletin Number 10-03-10-001A.
Revised Wheel Balancing Procedure for
Consistent Balancing Results
Concern
Customers may comment on a vibration or tire balance
concern while driving, usually at higher speeds. Initial
attempts at balancing the tire and wheel assemblies
may not have not resolved the condition.
Note: All current Service Information, appropriate
Service Bulletins and PIs still apply to this condition.
Specific details related to the Silverado and Sierra HD
trucks are included in this bulletin to assist with tire
vibration concerns.
The 2011-2014 tire and wheel assemblies for the heavy
duty (HD) trucks, especially the dual rear wheel
(dually), have more mass and a larger overall diameter
requiring specialized equipment and care.
Copyright 2013 General Motors LLC. All Rights Reserved.
Dual Rear Wheels (DRW)
The following information is specific to the Dual Rear
Wheel (DRW) Trucks
• Various adapters are listed below for use with the
DRW trucks. The first tool listed is the preferred
tool and will provide the best/most consistent
results.
• Preferred adapter/process
• There is a new adapter released for use with
the DRW trucks (and also works well with the
single rear wheel trucks). This kit is available
through GM Dealer Equipment (in Canada, at
DES-Canada) and works with the Hunter 9700
balancer.
• The kit fits Aluminum DRW wheels and allows
the normal functionality of the road force
variation balance procedure. For steel wheels it
will work better than any other adapter, but the
repeatability test referenced below may still be
required, and may have a tight fit.
Page 2
June, 2013
Haweka Pro Max GM II Kit for 8x180 and 8x210 Vehicles
•
Bulletin No.: 10-03-10-001B
specific procedure does not need to be used,
but any procedure used must provide
repeatable results.
For DRW trucks ONLY, the new adapters are
available that will allow the tire/aluminum wheel
assembly to reliably pass the centering check on
the Hunter 9700 balancer (item #709-280 400 113
Haweka Pro Max GM II Kit for 8x180 and 8x210
vehicles) If this adapter is not available, use the
most appropriate adaptors, such as
item # 20-1207-1 Extra Large Truck Cone Kit that
contains: Wheel Spacer # 46-309-2; Extra Large
Truck Cone # 192-92-2. (see photos below)
3468336
Haweka Pro Max Adapter Installed
2901770
3468327
• The remaining available cones/adapters may
not produce repeatable balancing results with
some balancers. With the older tools available,
it will most likely not be possible to pass a
centering check when attempting to balance
assemblies. If the updated tools released are
not used, it may be necessary to balance the
tire/wheel assembly bypassing the centering
check on the Hunter 9700 (and similar)
equipment or by using a truck-type balancer
that is capable of handling larger assemblies
similar to medium duty truck wheels
(Comparable to the TopKick or Kodiak trucks).
• The information provided below is not absolute,
it is only provided as guidelines to assist with
balancing the tire/wheel assemblies. This
2901776
•
When using truck wheel balancers, it is important
to use the proper settings on the machine for the
appropriate assembly to get within +/- 0.5 oz (15 g)
maximum balance tolerance. Typical modes are
truck, RV or car. Refer to your balancers
instruction manual for proper settings.
Bulletin No.: 10-03-10-001B
June, 2013
Note: The following is a procedure that can be used on
the Hunter 9700 equipment. Other equipment can be
used, but repeatable results must be obtained.
Perform a Balance Mode CenteringCheck®
• If the wheel successfully passes the
CenteringCheck®, balancing procedures can be
performed. If the wheel does not pass the
CenteringCheck®, “test spins” may be performed
to check for wheel centering repeatability.
1.1. From the balance screen, press the “Perform
CenterCheck” softkey.
Page 3
1.5. When spin is complete, raise the hood to
position the wheel with the valve stem at
12:00 o’clock and then press “Enter Valve
Stem” softkey.
1.6. Loosen the wing nut / AutoClamp ®. Remove
the wheel from the collet and rotate wheel
position on the spindle to change valve stem
location. Re-install the wheel on the collet
and re-clamp.
1.7. Lower the hood and the wheel will spin.
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2901783
1.2. Mount the wheel on the spindle and secure
with the wing nut/ AutoClamp ®.
1.3. If the rim runout method is selected, press
“Use Balance Mode.”
1.8. When spin is complete, raise the hood and
position the wheel with valve stem at
12:00 o’clock and then press “Enter Valve
Stem” softkey.
2901802
®
1.9. CenteringCheck results will appear.
2901791
1.4. Lower the hood and spin the wheel.
Page 4
June, 2013
Bulletin No.: 10-03-10-001B
Notice: It may be necessary to disable the load roller if
balance results are considerably inconsistent, in order
to obtain better balance results of the wheel. However
this will leave Radial Force Variation (RFV) ratings as
unknown and may be the root cause of a vibration
concern.
1. Perform a spin. Record the needed correction
weight and mark the correction weight location on
the tire with a tire pencil. This will be recorded as
“Spin 1.”
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2901815
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•
•
®
If CenteringCheck is successful, balancing
procedures can be performed. If the wheel does
not pass the CenteringCheck®, perform test spins
as described below.
If using the new item #709-280 400 113 Haweka
Pro Max GM II Kit for 8x180 and 8x210 vehicles, it
is still possible to get a failed centering check.
Re-mount the assembly and try again. Steel
wheels may still not pass and may require the
procedure detailed below in the “Perform a
Balance Mode CenteringCheck.”
Performing Centering Repeatability Test Spins
• Once failing a CenteringCheck® after the wheel
assembly has been mounted, and the correct
Balancer Setup is in place, test spins can be
performed. The procedure for checking centering
accuracy is as follows:
2901821
2. Unclamp the wheel assembly and change its
position by 90 degrees, either clockwise or
counterclockwise. Throughout the procedure,
continue the positioning using the clock motion first
used (i.e. all clockwise or all counterclockwise).
3. Perform a spin. Record the needed correction
weight and mark the correction weight location on
the tire with a tire pencil. This will be recorded as
“Spin 2.”
Bulletin No.: 10-03-10-001B
June, 2013
2901825
2901834
•
•
2901833
Evaluate Results:
When the two test spins have been completed, the
centering repeatability results may be evaluated.
Acceptable Results:
• If correction weight amounts and correction weight
locations remain relatively consistent, the results
can be considered valid.
• The following sample shows an acceptable result,
but only 2 samples are needed.
Page 5
If correction weight amount varies more than
0.9 oz., or if phase varies by more than 135° then
current balancer operating condition and/or setup
is unacceptable and should be evaluated.
Conditions that can cause unacceptable results
include:
– Incorrect Balancer Settings
– Worn Spindle Shaft
– Worn Collets / Cones
Radial Force Variation (RFV)
• When attempting to obtain the best possible RFV
measurements for a tire/wheel assembly that does
not pass the CenteringCheck®, it is necessary to
re-analyze RFV measurements to verify
repeatable results.
1.1. Obtain initial RFV measurement and record
the result.
1.2. Press the “Show Runout & Force Matching”
softkey.
1.3. Then press the “Runout/Matching” softkey
and follow procedure listed on the screen.
1.4. Mark the high point of tire and low point of
wheel assembly as indicated by the balancer.
Match Mount the assembly by removing tire
and remounting it so the two markings meet,
while exercising the bead to verify it is set
properly.
1.5. Remove the tire/wheel assembly and
remount it on the balance tool in a different
position.
1.6. Re-analyze the corrected tire/wheel
assembly to verify repeatable results.
– The locations of the high point of RFV and
balance weight locations should be within
+- 135.°
– The balance weight should be +- 0.9 oz.
Page 6
June, 2013
Alloy Wheel: 6 inch Clamping Cup w/AutoClamp®
Single Rear Wheel Trucks
•
•
Bulletin No.: 10-03-10-001B
Hunter Equipment has developed a bulletin
specifically to assist with balancing single rear
wheel assemblies. That information is duplicated
below with the permission of the Hunter
Corporation.
For balancing the tire/wheel assembly, make sure
to use one of the following three methods to mount
the assembly. Using one of these methods should
allow the tire/wheel assembly to repeatedly pass
the centering check and allow for good RFV and
balancing measurements:
Method 1a: Preferred Method 1
– Securing the offset spacer, 46-653-2 or 46-433-2, to
the spindle hub face. Mount the spacer, 46-360-2
and collet, 192-174-2 (4.800”-5.025” / 122 mm 128 mm), on the spindle shaft.
2901877
Steel Wheel: 6 inch Clamping Cup w/Wing Nut
2901838
– Center the tire/wheel assembly bore on the collet
and clamp using the 6 inch clamping cup or 9 inch
alloy clamping cup.
2901883
Method 1.b: Preferred Method 2
Securing the dual-sided collet from item #709-280 400
113 Haweka Pro Max GM II Kit for 8x180 and 8x210
vehicles to the spindle hub face. Mount the wheel and
then the four-arm star on the spindle shaft and tighten
with the auto clamp or wing nut.
Bulletin No.: 10-03-10-001B
June, 2013
Dual Sided Collet Mounted on the Back of a
Single Wheel Aluminum Rim
Page 7
Method 2: Alternate Method (Hunter TruckChuck®)
– Secure the Hunter TruckChuck®, 20-1602-1, to the
center bore of the rim. Ensure the chuck is secure
and uniformly attached.
Hunter TruckChuck® Correctly Attached (Rear View)
3468343
Four Arm Star Mounted to the Front of a
Single Wheel Aluminum Rim
2901890
Hunter TruckChuck® Correctly Attached (Front View)
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Page 8
June, 2013
Bulletin No.: 10-03-10-001B
Hunter TruckChuck® Correctly Attached (Close Up)
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– Mount the tire/wheel assembly on the balancer
spindle shaft.
– Clamp using the 6 inch clamping cup or 9 inch alloy
clamping cup.
2901952
2901935
After mounting the tire/wheel assembly to the balancer,
proceed with the balance/RFV operations verifying
repeatable results.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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