TR4 rear hub bearing reference (rigid axle)

[Chris59]

Hello guys and gales,

I'm after a pair of good quality (as Timken, if not NOS) GHB166 rigid axle rear hub bearings : who knows the Timken references or exact bearing dimensions ?

Thanks,

 

[BlueTR3A-5EKT]

I did all this 18 months ago and posted a spreadsheet in the Technical Bonanza.

https://www.tr-register.co.uk/forums/applications/core/interface/file/attachment.php?id=69077

 

[Chris59]

Thanks Peter, it certainly will help.

I've now remove the old bearing, and the inner bearing reference is 2523-S : it seems the "S" suffix is important, but can't tell if 2523 without this letter are different, as dimensions are similar.

[BlueTR3A-5EKT]

Speedi sleeve info is also in the Bonanza    It certainly fixed our leaking axle tube seals.

 

Speedi Sleeve - Made by SKF to repair worn seal areas of shafts etc.

 

1. Half Shaft Girling solid axle. TR3/3A/3B/4/4A .  where the axle tube seal wears on the axle shaft.    -    SKF 99131  or SKF CR 99131 (CR is uprated item)

2. Pinion Drive Flange on the nose of the axle/diff.   TR2/3/3A/3B/4/4A/4A IRS/250/5/6.  -  SKF 99149  or  SKF CR 99149  (CR is uprated item)  (Moss 520-500)

3.  Front Crank Pulley. Wet liner Engine . TR 2/3/3A/3B/4/4A/4A IRS   -  SKF 99175  or SKF CR 99175.  (1/2" wide) (CR Type is uprated item) (Moss 520-505)

    NB.  You can use SKF 99174 or SKF CR 99174 which are 3/8" wide and need care when installing to get in the right position over the wear groove of the engine front pulley drive flange.

 

Peter W

 

 

 

 

 

 

[BlueTR3A-5EKT]

Have the rear hub bearings failed on your car?   I have never seen a failed Timken bearing in that position.   Not even breaking up of the track due to foreign objects in the bearing area.   

How are you going to get the thing to bits, or have you already done that?

 

[Chris59]

I have to change the shaft itself, and do not want to use the old bearing, as it has already been forced out.

I don't think I'll need a speedy sleeve : the point is really to know what does mean the "S" in the 2523-S bearing ref.

[RobH]

 

27 minutes ago, Chris59 said:

the point is really to know what does mean the "S"

see "suffix letter" list in this PDF

https://cad.timken.com/Asset/Tapered-Single-Roller-Bearings---TS-Engineering.pdf

Quote:

 "S - Special feature bearing. (Non-interchangable with bearings having same basic
part numbers.)" 

There do appear to be different dimensions for the "Cup backface 'to clear' radius". What significance that has for the TR axle is not clear. 

 

 

Edited October 24, 2023 by RobH

[Chris59]

Thanks Rob, that's what I've found so far. The next step is to find if someone used a 2523 (without "S") bearing without problem so far : according to a Timken website, the dimensions and performances seems to be exactly the same.

 

I'm puzzled....

 

Part Number

Series

d - Bore

D - Cup Outer Diameter

B - Cone Width

C - Cup Width

T - Bearing Width

C1 - Dynamic Radial Rating (1 million revolutions)

C0 - Static Radial Rating

CAD

2585 - 252325001.3125 in33.338 mm2.7500 in69.850 mm0.9983 in25.357 mm0.7500 in19.050 mm0.9375 in23.813 mm18800 lbf83700 N21200 lbf94400 N

2585 - 2523-S25001.3125 in33.338 mm2.7500 in69.850 mm0.9983 in25.357 mm0.7500 in19.050 mm0.9375 in23.813 mm18800 lbf83700 N21200 lbf94400 N

[BlueTR3A-5EKT]

 S suffix on bearings.    
Came across this issue with the TR axle big pinion bearing.  We concluded the inner roller track and the outer race have a more generous radius on the faces that seat against the pinion head and in the recess of the axle hyoid housing.  The shoulder of a shaft having a good sized radius to reduce any possibility of cracking. We guessed it is to ensure the bearing seated fully on the register face not the corner radius
No doubt a bearing specialist will clarify     

[Chris59]

Hi Peter, okay, I'll ask the question via a Timken website, to be 100% sure