Industry-Leading Commercial Vehicle Products Eliminating Wheel Off Issues VMMC 2013 Brandon Uzarek Field Engineer The purpose of this training is to provide assistance in understanding materials that are presented in the Accuride Wheels Safety and Service Manual. No additional information is included in this training. This training contains only a high-level summary of the information found in the Accuride Wheels Safety and Service Manual. It should not be considered as a substitute. Please consult the Accuride Safety and Service Manual for additional details. accuridecorp.com
Tools What s in your tool box? What is important when it comes to wheels? 2
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Trouble Shooting Wheel End Looseness Technology & Maintenance Council s RP 238 4
TMC RP 238 5
TMC RP 238, continued 6
TMC RP 238, continued 7
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Recommended Installation Procedure Check all parts for damage, including rims/wheels Ensure that studs, nuts, mounting surfaces of the hub, drum, and wheels are flat, clean, and free of grease. 9
Recommended Installation Procedure 1. Use correct components 2. Before reusing flange-nuts that have already been in service, apply 2-3 drops of 30 weight oil to the swivel joint. This will allow the parts to rotate freely and provide the proper clamping force when tightened. Excessive lubricant is not desirable. Anti-Seize compounds are not recommended. 3. Before reinstalling nuts apply 2-3 drops of 30 weight oil to the first 2-3 threads of the studs. Be sure that the studs have been cleaned of excessive paint, rust/corrosion and debris with a wire brush. 10
Recommended Installation Procedure Before installing the wheel, lubricate the hub-pilot pads with a drop of 30 weight oil to prevent galling. Do not lubricate any other wheel or hub surface. This has potential to cause clamping force issues. 11
Recommended Installation Procedure An alternate lubrication method is a thin skim of a rust inhibitive lubricant such as Frey Lube No Rim Rust. Do not lubricate any other wheel or hub surface. 12
Hub Pilot Lubrication The industry is moving toward the recommendation of rust-inhibitive lubricants for hub pilot pads or hub bore on aluminum wheels. Anti-Seize compounds are not recommended. Two recommended lubricants are shown. 13
Recommended Installation Procedure 10 1 8 3 6 5 4 7 2 9 During the wheel installation process it is recommended to: Position a hub pilot pad a the 12:00 position Lubricate the hub pilot pads Snug wheel nuts in the proper torque sequence shown Then proceed to torque the wheels to 450 to 500 ft-lbs using the proper torque sequence shown After the first 50 to 100 miles wheel nuts should be re-torqued to the proper torque level. Refer to Accuride s Safety and Service Manual pages 46 through 52 for complete servicing procedures. 14
Recommended Installation Procedure Torque wheel fasteners to 450-500 foot pounds. 15
Recommended Installation Procedure 16
Retorquing Guidelines for Disc Wheels Technology & Maintenance Council s RP 237 17
TMC RP 237 18
TMC RP 237 19
TMC RP 237 20
Recommended Installation Procedure Refer to the Accuride Safety & Service manual or industry manuals for proper procedures for your wheel system. 21
The Effect of Torque and Clamping Force On Keeping Wheels Tight 22
Wheel Installation Fastener Installation & Torquing Clamping Forces Tension Tension Torque - 450 to 500 Ft lb 23
Torque and Clamping Force 22mm Studs & 2-Piece Flanged Nuts 24
The Negative Effect of Fastener Age 25
The Effect of Fastener Age 22mm Studs & 2-Piece Flanged Nuts Data is based on a fleet study with four year old, used 22mm Grade 8 Studs and 2-Piece Flange Nuts 26
Hub & Spoke Wheel Fastener Maintenance TMC RP 656 27
TMC RP 656 (T) 28
TMC RP 656 (T) 29
The Effect of Scale, Corrosion, Excess Paint On Keeping Wheels Tight 30
The Negative Effect of Scale and Corrosion on Mounting Surfaces 31
The Negative Effect of Too Much Paint Paint thickness gauge shows 16.68 mils or.01668 inches, which exceeds the maximum allowable of 3.5 mils or.0035 inches. 1. Examples of too much paint. The maximum allowable paint thickness is.0035 or about the thickness of an average magazine page. Paint on these wheels measured from.016 to.028. 2. One rule of thumb is that if you cannot read the stamping on the wheel there is too much paint. 3. These wheels should be repaired before being returned to service and installed on a vehicle. 32
The Negative Effect of Too Much Paint Thick Paint or Debris Thick paint/debris works out while vehicle is being driven Thick paint/debris works out while vehicle is being driven If wheels are installed with excessive paint thickness, debris, or excessive corrosion as shown above in dark orange - - - - - - - - The paint, debris, and corrosion will gradually work its way out during operation and - - - - - - - - The wheel(s) will become loose, which could result in cracked or broken wheels, damaged brake drums, broken studs, and wheel separation from the vehicle. 33
The Negative Effect of Too Much Paint Emergency Wheel Repair ALWAYS USE PROPER SAFETY/PROTECTION EQUIPMENT 1.Thoroughly remove all paint or rust/corrosion from the mounting surfaces. Use power wire brushes or die grinders with ScotchBrite pads. Course sand paper on power tools or grinding discs are not recommended because they may create deep scratches in the metal which could cause cracking. 34
The Negative Effect of Too Much Paint ALWAYS USE PROPER SAFETY/PROTECTION EQUIPMENT Emergency Wheel Repair 2. Paint the mounting surfaces with a fast drying white enamel paint. Do not apply too much paint. Paint should not exceed.035 mils. That is approximately the thickness of an average magazine page. Apply just enough paint to hide the metal surface under the paint.* 3. Allow adequate time for the paint to fully dry (or cure). 4. As an alternative, a professional wheel refinishing company Is recommended. *Know and follow all local paint application regulations. 35
Review of Actual Wheel Off Incident 36
Avoiding Loose Wheels THANK YOU Brandon G. Uzarek Field Engineering 800.869.2275 buzarek@accuridecorp.com www.accuridewheelendsolutions.com 37
Industry-Leading Commercial Vehicle Products