Hello again from Sherwood.
Sitting opposite my truck and wondering WTF!
Proceeded to undertake the task of setting the end float of the hub bearings as previously canvassed in this thread.
Happened to attack the hub on the recently replaced front outer swivel housing - subject of another previous thread - first up. Tightened the hub to 110 ft/lb and on rotation noted a firm episodic resistance and metallic sound as it turned. Slackened it off and rotated again and still the same albeit less obvious. On closer examination the rear of the hub near the seal housing is catching on a couple of the heads of the bolts that hold the stub axle and brake backing plate to the swivel assembly. These bolts appear to be in as far as the design engineers had first intended. The precision of the diameter of the hub casting might not have been so, as it clearly isn’t perfectly round - hence the episodic vs constant catching with the bolt heads.
I went across to the other front hub and tightened it to 110 ft/lb and then followed the rest of the recommended procedure - worked perfectly. So, I was wondering if the issue was slight differences in the casting diameter of the hubs themselves at the point of contact - I suspect that mine came off a couple of different vehicles at some time in the past. To check that, I took a hub off the rear axle and went back through the same procedure on the offending front axle. Same as before - a couple of the bolt heads are interfering with the edge of the hub as it turns.
This leaves me with a couple of possibilities - one being that the replacement swivel housing that I picked up last week is somehow different to the other one that is on the truck or something else. That seems to be fairly unlikely - the something else might be that the heads of the bolts that are making contact with the hub as it rotates are not exactly set at right angles to the turning hub - ie. the edges are catching at critical points but not enough the prevent the hub from turning. Seems odd, and I hadn’t thought the tolerances would have been that tight, but I don’t seem to have too many options other than to undo the lock tabs and reset the heads at right angles and see if that makes a difference.
Tomorrow maybe since I cracked my Solihull patience and forgiveness quota for today.
Anything else to consider?
Cheers,
Neil
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