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Strange tyre wear - please help

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2 years 1 week ago #233257 by Blackduck59
Those tyres also look underinflated, that maybe aggravating the alignment issues.
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2 years 1 week ago #233262 by ashmenz0
Blackduck59
What pressure do you suggest I run?

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2 years 1 week ago #233263 by ashmenz0
Thanks heaps guys
I did a quick (rough) measure with a tape and found the passenger side to be around 30mm longer between the axles than the drivers side. Looks like I’ve got some work to do.
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2 years 1 week ago #233264 by jeffo
Weird tyre wear is typically a caster problem, will need specialist gear to diagnose properly.
Worn shackle pins or broken centre bolt can cause front to rear axle dimensions to differ so you’ll have to check all suspension components before you call on a mobile wheel alignment bloke.
Worn kingpins or loose wheel bearings can also cause strange wear but you would have checked those at annual machinery inspections.
Caster on leaf spring/axle setups is corrected by fitting tapered wedges between axle and spring.
Very common job.
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2 years 1 week ago #233269 by JOHN.K.
If its an airbg Denning,Id have a good look at the front suspension ,as its trailing arms fabricated from light wall tube.........cracks in the chassis mounting of the trailing arms were pretty common.......generally a crack joining the two pivot points.............the moun ting of the fabrication to the Rockwell axle may also be loose.
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  • Swishy
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2 years 1 week ago #233275 by Swishy
FWIW



akso look @ where the spring sits on the saddle @ the axle
Look for movement ... as in a fine line and not sealed with dirt or rust etc
Check all chassis bolts th@ hold the suspension


Cya

OF ALL THE THINGS EYE MISS ................. EYE MISS MY MIND THE MOST

There's more WORTH in KENWORTH
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2 years 1 week ago #233276 by ashmenz0
Hi PaulFH
It’s not air suspension, only springs front and rear, Rockwell I believe.
Cheers
Ash
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2 years 1 week ago #233281 by Mrsmackpaul
Dunno if this will be of any help, it is for Mack trucks if the link works

www.google.com/url?sa=t&source=web&rct=j...BmBG5ZDhO8dUnxe2FVRs

Should open a pdf but who knows ?

Even though it isnt quite right it ahould give you some really good indications of what is or isnt wrong and hopefully take a lot of the guess work out

Paul

Your better to die trying than live on your knees begging
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2 years 1 week ago #233282 by PaulFH
AshmenzO - His business involves correcting power steering faults, which give rise to
many tracking problems, including abnormal steer tyre wear.
Operators spend heaps on other corrective measures, often without result.

Worth viewing some of their U-Tubes if only for information. Paul.
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2 years 1 week ago #233283 by mammoth
Is the rear single or tandem axle?

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