HILLMAN CAR CLUB
OF SOUTH AUSTRALIA INC
Tech Tips:  
Differential Oil and Seals
HILLMAN CAR CLUB
OF SOUTH AUSTRALIA INC

From: Jeff Coen [jeffco(at)airmail.net]
Sent: Friday, 2 February 2007 5:05 PM
To: HillmanCars@yahoogroups.com
Subject: [HillmanCars] rear oil seals

In working on the rear brakes of the Husky, I found a lot of oil and grime behind the back brake plate leading me to believe the rear oil seal was bad.  So, I've succeeded in removing the shaft w/hub and then the hard part of removing the hub from the shaft.  That was interesting, but the guys from Sunbeam Specialties sent me a picture of the tool w/the gaskets and I got one off ebay.  I read an interesting hub removal article on a old military jeep website and got it accomplished – without injury to me or the parts.  So now I have the oil seal carrier with the old oil seal inserted.  How do I remove it?  Does it have to be pressed out? and if so how?

BTW, it was a good thing, I pulled it down as there was very little fluid left in the differential.  I hope I would have remembered to check it at some point, but who knows.  Can someone suggest the best modern replacement fluid?  Remember this is Texas and not very cold.  My grandfather lived in Wyoming and Colorado and use to tell me they had to build a fire under the old Ford Model A to get it to move when below zero.  Not a problem here.  We think it frigid if below freezing.
–Jeff


From: Graham Robinson [grhusky(at)optusnet.com.au]
Sent: Friday, 2 February 2007 7:56 PM
To: HillmanCars@yahoogroups.com
Subject: Re: [HillmanCars] rear oil seals

Jeff,
As far as I know you have to remove the axle nut (140+Lbs/ft) to then remove the hub before you can remove and fit a new seal.
Later in production Rootes did away with this concept and just used the oil splash plate rotated with the drain hole to the top to stop oil from exiting.  Look in the diff section of WSM 114 and you will see the two versions.
I have installed 1966 Gazelle half axles with the larger brakes and use the splash plate and 'goo' or gasket with no drain hole to seal the end of the diff housing – very successful on my Husky and no oil seal without any problems.
The Husky diff housing is the same shape and size as the later ones only the shocker mounts and hand brake bits vary where the rest is common with other Hillmans.
Others will comment I guess!
Graham.

From: Vic Hughes [v.hughes(at)student.canberra.edu.au]
Sent: Monday, 5 February 2007 8:50 AM
To: HillmanCars@yahoogroups.com
Subject: Re: [HillmanCars] rear oil seals

Jeff,

It will need a quality heavy grade diff/gear oil (not SAE30 like the manual gearbox and not ATF).  Is yours a spiral bevel diff or a hypoid?  I looked at the Shell Australia website which has a 'lube match' feature, where you input make model etc – it actually lists Hillmans!.  They say for spiral bevel diffs use 'Spirax 85/140' but for hypoid use Spirax A90 or Helix LSD fluid.

The site correctly specifies SAE 30 for manual transmissions and even has oil spec for easydrive transmissions http://www.shell.com/home/Framework?siteId=au-en

Cheers,Vic

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