Wheel Bearing Torque Observstion

[Toadhopper]

So I was retorqueing the wheel bearings in my 60 and I came across something interesting.
While chatting with Kurt at Cruiser Outfitters he mentioned the torque values being 6-12lbs (rolling friction + 6-12lbs).
In my 1984 FSM it states 0.9 - 7.3 for the the same thing (page FA-15). I called him back to double check and he looked through several FSMS different years and on later models (62s) it shows the higher specs.
He said they always do 12lbs, and that all the part numbers for bearings etc. in the 60s and 62s are all the same so he thought Toyota reevaluated the specs and changed the recommended settings.

Anyway, kind of interesting. I've been torquing at the lower specs for the past 10 years, but recently have been trying to figure out a resonance sound I get on the freeway between 45 and 65mph. Maybe this will make it go away!

Bryan

 

[Output Shaft]

I've been torquing by feel at the minimum spec (or less) for 31 years. Thousands of miles of rough dirt roads over the decades. No problems. Using Mobil 1 red synthetic wheel bearing grease. Repacking & checking bearings according to owner's manual severe schedule.

 

[Toadhopper]

So I was retorqueing the wheel bearings in my 60 and I came across something interesting.
While chatting with Kurt at Cruiser Outfitters he mentioned the torque values being 6-12lbs (rolling friction + 6-12lbs).
In my 1984 FSM it states 0.9 - 7.3 for the the same thing (page FA-15). I called him back to double check and he looked through several FSMS different years and on later models (62s) it shows the higher specs.
He said they always do 12lbs, and that all the part numbers for bearings etc. in the 60s and 62s are all the same so he thought Toyota reevaluated the specs and changed the recommended settings.

Anyway, kind of interesting. I've been torquing at the lower specs for the past 10 years, but recently have been trying to figure out a resonance sound I get on the freeway between 45 and 65mph. Maybe this will make it go away!

Bryan

SO I just went for a test drive and that annoying humming sound is pretty much gone! Just normal road noise associated with the 33s

 

[Output Shaft]

How loose were they before you tightened them up?

 

[cruiseroutfit]

Somewhere between 1984 and 1988 Toyota changed the spec in the FSM. I have an 86 and I think 87 FSM that I need to dig out to see what they recommend, perhaps the change happened with the 62 FSM as it was likely a major publishing overhaul versus the 84-87 60's? Either way we've always done NEW bearings at the high end of the limit and used at the mid range. Hundreds of wheels later it's never been an issue.

 

[LAMBCRUSHER]

they are BIG bearings. Have you seen this>>>

 

[MANUCHAO]

Has anyone experienced or know of a bearing failure on these rigs due to over tightening?

 

[cruiseroutfit]

Has anyone experienced or know of a bearing failure on these rigs due to over tightening?

Absolutely, too tight and they will burn up, damaging he spindle and even the hub body with it.

 

[LAMBCRUSHER]

just as any bearing set too tight would do, you just have to work harder to screw up bigger bearings...

 

[HemiAlex]

Hmmm. I've got a strange resonance at speed and my torque wrench was acting up as I was finishing one side of my truck on the hub and wheel bearing refresh.

I'm going to check now...