I have lost count of the number of times a wheel fitter has gunned up the nuts then to use torque wrenched to set the nuts. Lesson 1 of 1 if the torque wrench clicks on first rotation its over torqued not to the right level.
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Yeah, when I’m teaching my students how to fit wheels, they are told to tighten by hand, let the car down then torque up to correct setting. I explain to them that if the nuts should be, say, 110Nm and they are gunned up, if the wrench clicks without turning the nut, it could have been tightened up to 111Nm or 200Nm and they wouldn’t know. I tell them I want to see the nut turn before the wrench clicks.
Ever drove a car with loose wheel nuts ? Tends to be why wheels have a torque setting supplied by the manufacturer
We used to spin the nuts up worn a spider, lower the jack and torque to the correct setting. Then ask for a QC quality control check.
This was all listed on the paperwork. Never used a gun to tighten a wheel nut.
This was all listed on the paperwork. Never used a gun to tighten a wheel nut.
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Unfortunately that would be the industry ideal. Training understanding the requirement and how to use a tool to deliver the right result. It happened so often it seems it be a strategy to 'show' the customer in using a special tool to make it look like we know what we are doing. Unfortunately mostly the customer only realises this when they try to change a wheel at the roadside.
How does this remind me about a parable around socialists and Brexit?
How does this remind me about a parable around socialists and Brexit?
I’d always tried to show Mrs Mottie how to change a wheel but she didn’t want to know. She had no f ing interest. Years ago, we came out of Lakeside shopping centre and we had a flat tyre in our Mondeo. "Right" I told her, "You can sit here and watch how to do it". All I got was a tut and a rolling of eyes. "First thing, loosen the wheel nuts". I tried but I couldn’t get one of the nuts loose as the chocolate wheel wrench just slipped round on the nut! I was stuck. I ended up going back into the shopping centre and buying a foot pump from Robert Dyas to pump enough air into it to get us halfway home before having to pump it up again. Got home and used a proper socket, an 18” bar and a trolley Jack. She still doesn’t know how to change a wheel. Her solution: "I'll get a man to do it"!
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I'd like to see this.
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Most if not all mechanics are taught this. It's taught early in the learning cycle.
General fitters without training are different.
It's standards. Just like the EU has, if you want to bring Brexit up. Whereas some will operate below those standards
Likewise, mechanics are taught not to grease between wheel and hub for specific reasons of clamping forces.
Unless mottie can prove me wrong I think he us giving out dangerous advice
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Find me some proper information about clamping forces and grease please to back up you and notties claim
It is bordering on dangerous.
How do you know about mine versus motties knowledge , training and qualifications?
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On the centre hole yes. A small amountA smear of anti sieze compound ( grease) on the hub stops the wheels jamming onto the hub
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All this talk of grease and holes...I can feel another "Fnarr, fnarr!" coming on....
I get your point, yes they're tapered. But they don't take the weight of the car, they just squeeze the wheel on, the hub takes the weight directly, mostly via friction.
The wheel bolts just stop the wheel sliding against the hub. They indirectly take the weight of the car, but they do this horizontally by squeezing the two together. The car applies little weight vertically to the bolts, if you slackened them until they did take the weight then they'd probably snap.
20 years in the motor trade and I’ve never heard anyone say anything remotely like that. The wheel nut is the most important part and grease on the hub, nut flange etc will have no negative effect as the nut/s hold the wheel on.
Every loose wheel I’ve ever seen has had slack or missing wheel nuts.
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