Front wheel bearings 1990 Nissan TD42 ST Patrol Wagon
Submitted: Tuesday, Aug 21, 2007 at 18:40
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Bluespot
Had my Front wheel bearings replaced 18 mth ago by Mechanic and ever since they have seemed a bit hot.
Made some adjustments when bearings were cold the other day and found the following.
When
wheels are jacked off the ground they spin free with no bearing knock. I loosened the pre load nut 1/6th of a turn and now bearing knocks when wheel is rocked. What gives!!!!!
They seem to be either too tight or loose ,can't find the balance.
The pre load nut is on a fine thread.
Cheers,
Bluespot
Reply By: handy - Tuesday, Aug 21, 2007 at 19:04
Tuesday, Aug 21, 2007 at 19:04
i know exactly what your saying. i replaced
mine a while ago and cant find a happy medium. they run a bit hot so i just keep an eye on them. cheers
AnswerID:
258323
Reply By: Flash - Tuesday, Aug 21, 2007 at 19:19
Tuesday, Aug 21, 2007 at 19:19
I'd say they WERE right before.
Cheers
AnswerID:
258328
Reply By: Member - Axle - Tuesday, Aug 21, 2007 at 19:24
Tuesday, Aug 21, 2007 at 19:24
When theres no play in them, how free do they spin?
sure your using the correct grease.?
Axle.
AnswerID:
258330
Follow Up By: Bluespot - Tuesday, Aug 21, 2007 at 20:58
Tuesday, Aug 21, 2007 at 20:58
The
wheels spin over with minimal effort by hand and stop around 3\4 of a turn from the moment I stop spinning when their is no play.
With play they run on for about 1 & 1/4 turns
Haven't greased em yet as I want to work out what is the normal set up when cold.
Do I grease up and set with a small amount of knock or reset as original an let em run hot.
At original set up from mech
shop you can't touch the free wheel hubs for to long after 20 km drive (the heat isn't coming from the brakes as I tried a test drive and used miminal braking before checking for heat)
Any help in the setup is appreciated.
Bluespot
FollowupID:
519650
Reply By: Member - Ed. C. (QLD) - Tuesday, Aug 21, 2007 at 21:27
Tuesday, Aug 21, 2007 at 21:27
Too much grease can make 'em run hot..
Some people seem to think that ya hafta fill the hub chocka-block fulla grease.. Not So!!
This serves no useful purpose whatsoever (boat trailers are another kettle o' mackerel;-)....
What it does do, is to create drag, and as things warm up in there, there is no room for expansion, and so things just get hotter!
As long as the bearings are properly packed, you're better off _not_ filling the airspace fulla grease.. smear a bit all around the place by all means, but leave plenty of airspace...
I like to adjust
mine so that I can just feel a teensy weensy bit of end-play when cold.. This has worked for me for 40yrs, and I've not yet had a bearing failure...
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AnswerID:
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Follow Up By: Ron173 - Wednesday, Aug 22, 2007 at 09:06
Wednesday, Aug 22, 2007 at 09:06
Very good advice.
Spent lots of time with BIG skf bearings and reps looking at failures, the air space cannot be stressed enough.
Ron
FollowupID:
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Reply By: Member - Duncs - Wednesday, Aug 22, 2007 at 15:08
Wednesday, Aug 22, 2007 at 15:08
There is a torque setting for the wheel bearings.
Get a big socket, 53mm I think, hook it on to your torque wrench and go to it.
I tried for ages to get
mine right by tensioning
the nut, spinning the wheel and feeling for knock. It took about 2 min with the torque wrench.
I made the socket myself with some flat bar and a lot of patience. It was still quicker and much more accurate than the spin and guess method.
Duncs
AnswerID:
258446
Follow Up By: Bluespot - Wednesday, Aug 22, 2007 at 23:22
Wednesday, Aug 22, 2007 at 23:22
Thanks for the advise Duncs
I made a socket when I first started to question the heat being generated
Do you know the torque setting you used as I want to get it right when I do a full strip down and repack.
Cheers,
Bluespot
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Follow Up By: Member - Duncs - Friday, Aug 24, 2007 at 10:09
Friday, Aug 24, 2007 at 10:09
Sorry,
I no longer have the manuals. Gave them to a mate when I sold the car. You should be able to get the info from your local Nissan Dealership. talk to the service department, I have found them to be very helpful with that kind of advice.
Duncs
FollowupID:
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