Ensuring proper wheel bearing torque every time

Ensuring proper wheel bearing torque every time

Over-tightening can damage the lug nuts, wheels and hubs - and worse, result in a wheel-off situation.

When the truck leaves the plant and is delivered to a customer or dealer, all wheel bearing and torque adjustments are done according to the manufacturer’s specifications. Unfortunately, the very first time a wheel is removed for a tire change or a brake job, the lug nuts are rarely put back on to controlled specs. Rather, they are slammed back on with a one-inch impact gun and are often tightened by as much as 200 to 400 ft.-lbs. over spec. This over-tightening is the one of the major reasons that wheel offs occur, due to the stretching of the studs beyond their yield points.

Over-tightening can also damage the lug nuts, wheels and hubs. These wheels will be taken off and put back on dozens of times over the life of the vehicle, each time being subjected to different tightening methods and/or numerous torque levels – in short, a wheel-off waiting to happen.

I have found options in the aftermarket that allow fleet technicians to install all of the lug nuts on the wheel to the exact, consistent specifications of the manufacturer (or fleet maintenance practices), which reduces the potential damage caused by excessive over tightening. The solution is a hand-held, pneumatic nut runner (air torque wrench). There are numerous brands from different companies, but Chicago Pneumatic manufactures the one I like best, the Blue Tork. This precision hand-held tool is not an impact gun. It is a precision nut runner that uses technology approved by international standards for measuring torque. The tool is quiet, and since it is not an impact gun, it is smooth and gentle with regard to the hands and arms of the technician.

With this type of tool, fleet shop technicians can be confident that they have installed the wheel and the lug nuts to the exact specifications. If your maintenance program includes torquing every wheel at each PM, you may want to use a nut runner to reduce physical labor and to possibly avoid an injured employee/workmen comp claim – or worse, a wheel-off situation.

Over the last 30 years of my career in this industry, I have been advising fleets to do frequent torquing and, where volume permits, use the proper air torque wrench.

For more information, visit www.darrystuart.com or e-mail comments or question requests to Darry at: [email protected].

You May Also Like

Addressing uptime and driver retention with the proper equipment

Two things that are on fleet managers’ minds pretty much every day: uptime and driver retention. Both are a real struggle for any fleet manager, and many (if not most) equipment decisions are made with these two struggles in mind.

truckdriver-800x400

Two things that are on fleet managers’ minds pretty much every day: uptime and driver retention. Fleet managers want their trucks out on the road generating revenue as much as possible, and they want the drivers of those trucks to stick around, without having to constantly look for replacements.

How to start talking about electric truck charging infrastructure

Before you approach a utility partner to establish your own electric truck charging infrastructure, you have to know your power needs. How do you do that without running trucks?

Penske_Truck_Leasing_heavy_duty_electric_vehicle_charging_station-800x400
The four pillars of your true tire costs

Typically there are four pillars to determine your true cost: Initial tire cost, mileage to removal, fuel efficiency and retreadability (or casing value).

AC_tires
Amped up for electrification: NACFE’s Mike Roeth on how to implement electric truck infrastructure

According to Mike Roeth, executive director of NACFE, the report found that making electric trucks a widespread reality will take a lot of collaboration, with not just the fleet, but utility companies, service shops, charging companies and construction firms all needing to be involved in getting the proper infrastructure into place.

Amped-Up
When it comes to investing in new trucks, listen to the data

We make a lot of decisions with our gut, but truck lifecycles are complicated, and the decision to invest in new trucks isn’t one that should be made based solely on how you feel about it.

Truck-investments-listen-data

Other Posts

Overhaul launches Asset Manager to increase visibility, optimize fleet management

Overhaul, a software-based, supply-chain risk-management solution, has recently unveiled the latest addition to its product portfolio, Asset Manager, a new offering that provides real-time asset and in-yard visibility, enabling greater control over assets that are both in-transit or stationary. The new offering leverages real-time data to empower warehouse, yard and fleet management teams to make better business decisions

overhaul-asset-management-600
Signs of truck tire wear: What to look for and what to do next

Related Articles – Leasing and Finance Index new business volume for November up y/y – December Class 8 intake caps off a robust final four months – A new standard for diesel power is set in California Managing your tire program requires looking for signs of wear or damage and properly maintaining your vehicle to

tire-damage-generic
Stepping stones: Bendix travels further down the road toward the automated future

Related Articles – Lion Electric announces production of first lithium-ion battery pack – Voltera partners on EV maintenance, fleet support – AT&T, Geotab partner on transportation decarbonization When we talk about automated vehicles, there’s a temptation to place the conversation far off in the future, but it’s worth remembering that the bones of the automated

The background behind diesel particulate filters

  Related Articles – LSI promotes new Hot Shot’s Secret brand manager – Alta eMobility to service, distribute BorgWarner DC fast chargers – Bridgestone on pace to achieve record YOY Bandag growth During the combustion process, particulates can lead to increased emission problems and negative health effects. As regulatory changes in emission standards aim at

Heavy-Duty-Truck-Engine-Generic