[DeTomaso] Wheel bearing issues

[Dagny Kristine Bakken]

No matter what car,i agree with Tomas that there is no good(safe) in setting
up a pair of tapered roller bearings for the wheels,with preload.The
conseqenses of going to tight is in worst case dangerous,and the only
drawback from having a little play,is that the bearings will last a little
shorter.A common place were a preload of the tapered bearings are needed
(for accuracy)and safe if done right,are in transmissions and
differentials,but the better cooling and lubing from the oilbath they work
in makes them less vulnerable.The adjustmentnut and its lockingfeature is of
great importance,as there must be enough alternatives so that it can be
locked in the position were the play is found to be ok,and maintaine its
position under all circumstances. Even when the bearings innerrace and the
washer are spinning due to a brakedown it shall manage to stay in position.I
belive a castlenut locked by a cotter pin is a good solution.

Best regards
Øyvind Bakken

-----Opprinnelig melding-----
Fra: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] På
vegne av Tomas Gunnarsson
Sendt: 4. oktober 2007 09:37
Til: detomaso realbig
Emne: Re: [DeTomaso] [SPAM] Wheel bearing issues

 Fred,

I thought we were talking about front wheel bearings as installed on the
Pantera. My point is that installing them preloaded might result in
excessive preload due to temp differences.

Tomas
	


> Från: F&D Terry <gt5s at bcpl.net>
> Till: Tomas Gunnarsson <guson at home.se>
> Rubrik: Re: [DeTomaso] [SPAM]   Wheel bearing issues
> Datum: Wed, 03 Oct 2007 18:44:33 -0400

> Thomas,
> 
> I don't see any exceptional differences. Both the Corvette and 
> modified Pantera upright employ a pair of taper bearings to mount an 
> axle in a housing with a brake disc on one end and a u-joint on the 
> other. I guess either preloaded or bearings with slight end play will both
work.
> 
> Fred T.
> 
> Tomas Gunnarsson wrote:
> 
> >Is it possible that the application we're talking about is 
> >exceptional
> compared to other applications? In our case heat from braking will 
> spread from rotor to hub long before the spindle axle is hot. This 
> might decrease play or increase preload in a somewhat unpredictable way.
> >
> >Tomas
> >
> >----- Original Message -----
> >From: "F&D Terry" <gt5s at bcpl.net>
> >To: <arkoch at earthlink.net>
> >Cc: <MikeLDrew at aol.com>; <pantera at pobox.com>; <detomaso at realbig.com>
> >Sent: Wednesday, October 03, 2007 8:55 PM
> >Subject: Re: [DeTomaso] [SPAM] Wheel bearing issues
> >
> >
> >  
> >
> >>Dick,
> >>
> >>There seems to be two acceptable schools of thought concerning preload. 
> >>The Corvette shop manuals for '63 forward specify a .001" to .007" 
> >>free play to be within acceptable limits for the taper bearing rear
uprights.
> >>>From a '63 shop manual, "The tapered roller spindle bearings should 
> >>>have
> 
> >>end play of .001"-.007". Check end play and, when necessary, adjust 
> >>as follows." I have owned many of these cars and have never had problems