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Bigred82576

Axle break down?

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Hi there I have a 1958 Mack b81sx where can can I find a parts break down of the axles, I need pinion seals and gaskets. Vin # b81sx1654. axle #’s F/R 11kha556p20.   R/R 11kha4134ap20.  815 gear ratio any help would be appreciated thank you.

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The pinion seals must be the same as CRD92/93 carriers had which were used on R-models and many newer Macks. Try checking Stemco web site. They have online catalog for hub and pinion seals with sizes and discription.

From what I have in my copybook you seals should be :

Front input Mack 88AX458 Stemco 429-0002 4.5x3.5"

Front output 88AX456 429-0008 3.537x2.751

Rear input 88AX457 429-0009 3.996x2.751

If you were saying your truck is B61 I'd say go with the numbers I posted. But you B81SX might have heavier carriers . So better slick under the chassis with a caliper and relate the sizes.

Vlad

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3 hours ago, Vladislav said:

The pinion seals must be the same as CRD92/93 carriers had which were used on R-models and many newer Macks. Try checking Stemco web site. They have online catalog for hub and pinion seals with sizes and discription.

From what I have in my copybook you seals should be :

Front input Mack 88AX458 Stemco 429-0002 4.5x3.5"

Front output 88AX456 429-0008 3.537x2.751

Rear input 88AX457 429-0009 3.996x2.751

If you were saying your truck is B61 I'd say go with the numbers I posted. But you B81SX might have heavier carriers . So better slick under the chassis with a caliper and relate the sizes.

Vlad

A B81 could have the 50,000 rears, takes a different carrier, different seals maybe.    terry:MackLogo:

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They are CRD92/93 rears.Thanks for the info guys. 

Edited by Bigred82576

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Hi there R/R didn’t work still leaks does anybody have a part # for a pinion yoke sleeve? It’s 2.75 O.D. Thank you.

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https://www.napaonline.com/en/p/NOS99269

 

"N" Nominal Dimension 2.750 in. / 70.00 mm
Brand Name NAPA Oil Seals / SKF (CR)
Fits Shaft Diameter 2.750 in. To 2.756 in. / 69.85 mm To 70.01 mm
Flange Diameter 3.125 in. / 79.38 mm
Installation Dimension 1.250 in. / 33.32 mm
Seal Surface Width 1.125 in. / 28.58 mm
Speedi-Sleeve I.D. 2.75 in.
Speedi-Sleeve Width 1.25 in.
UNSPSC 31171509

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