Mack MH rear hub seal

[Vladislav]

I have all the wheels and hubs off my 1990 MH613 removed.

The plan was to paint them and change some tires.

Having apart I found most of the bearings worn out so I ordered them and they're on a shelf now.

When I started to look for hub seals Stemco parts catalog gave me 4.5 x 5-3/4 for rears and 572/582 with 563/567 bearings in the same 38000 Mack hubs. The bearings I've got are almost these although the hub's actual measurements gave me 5-5/8 x 6. I recognized such seals but they described "for trailer hubs".

Looking the axle housing spindles I noted the sleeves pressed on with 5-5/8 OD. They seemed made with a lathe but too might be factory.

All this looks strange to me. I see no trouble to put different seals but want you to know does anybody meet such the setup?

The hubs look as common 38000's (34000's-?), there's written "Mack" on one of the spokes and "Canada" on the other.

Thanks for any input,

Vlad

[kscarbel]

The easiest way is to provide Barry with your full model and serial number. He can then tell you the correct part number for the seals.

He's going to tell you what the truck was built with, which could be Stemco, CR or National (they were all factory options).

Your truck might very well use the following seals:

Stemco 392-9094 (seal + wear band kit) or 309-0903 (guardian one-piece)

CR 45099 (Mack # 88AX407)

National 370022A (Mack # 88AX467)

I personally prefer National.

[39 Baby Mack]

The easiest way is to provide Barry with your full model and serial number. He can then tell you the correct part number for the seals.

He's going to tell you what the truck was built with, which could be Stemco, CR or National (they were all factory options).

Your truck might very well use the following seals:

Stemco 392-9094 (seal + wear band kit) or 309-0903 (guardian one-piece)

CR 45099 (Mack # 88AX407)

National 370022A (Mack # 88AX467)

I personally prefer National.

I agree with kscarbel, use National, but I would upgrade to a 380022A Teflon seal

Ron

[Vladislav]

Here the magic begins.

Stemco 392-9094 and SKF45099 are both what I was going to see there, 4-1/2 x 5-3/4.

But the hubs no doubt have the bores for 6.

Combined with 5-5/8 sleeves it was asking for different seals, and I figured out they exist - Timken 370025A, 380025A, SKF 46305.

[kscarbel]

Simply contact Barry with your model and serial number, and find out the actual Mack OEM part number (why do this the hard way?). Given you are a special case, a customer in Russia, I'm sure he'd be willing to work with you.

[Vladislav]

Thanks again for the advice.

We deal with Barry sometimes, he's a classy guy.

It looked he was being busy and re-directed me to Tracy.

He's also very good but used to be slow.

This time I found the correct seals locally (SKF) so didn't want to disturb Watts folks with no actual need.