IRS hub strip down

[kgb123]

Hi,

I'm a little confused about how to proceed with removing the hub carriers from my IRS. Most of the images that I have in books and manuals show a hub with wheel mounting studs being pulled off the hub carrier. What do i do with mine?



Do I pull the splined drive off the Hub carrier first? It looks like thats been done previously as flange is bent in places and torn in one place. My other thought was pulling the hub carrier directly of the shaft?

Once hub carrier is off, the books I have cover the rest of the dismantling and overhaul...I think.

Thanks in advance for help and advice.

Kevin

[christopher storey]

I find that the best way is to take out the split pin and undo the large hub nut within the splined hub, then ( but not before ) uncouple the inner driveshaft from the brake disc, and then take the lower fore and aft bar ( proper name is the fulcrum shaft ) out of the hub carrier - one nut off one end and then drift it out - and the driveshaft and hub and carrier can then be withdrawn complete . If you have a press, the driveshaft can then be pressed out of the hub, but personally I do these by putting the hub carrier on a bench with the driveshaft facing downwards, - I use a B&D workmate with some timber to beef it up because it makes pointing the shaft downwards easy - putting the nut back on the driveshaft, and with a suitable block and a 15lb lump hammer giving it some welly . Fortunately, the ones I have done have not been loctited, and have come out fairly easily. If they have been loctited as per an XJ6, then you may need heat in addition, but be careful with this because the hub carrier has a low melting point so an oven is a better bet than a blowtorch

[angelw]

Kevin Wrote:

Do I pull the splined drive off the Hub carrier first? It looks like thats been done previously as flange is bent in places and torn in one place. My other thought was pulling the hub carrier directly of the shaft?

Hello Kevin,
You first have to remove the splined half shaft from the hub. The method used to remove the splined hub is the same as for the wheel stud type hub; only the device that attaches to the hub is different.

In my opinion, its not good practice to press the splined shaft from the hub by supporting the aluminum hub carrier. Mostly the splined shaft will come out fairly easily, but should it not and you became over zealous with the press, the hub carrier can be damaged.

The correct tool for removing the hub from the splined half shaft is designated as JD7A. Its a two part tool consisting of a double ended, internally threaded boss (one end LH Thread, the other RH), with a centre hole threaded to accept a large, threaded jacking bolt. In operation:

1. The Threaded Boss is screwed onto the hub to be removed from the splined half shaft

2. The jacking bolt is screwed into the boss until it makes contact with the end of the splined half shaft and continued until the half shaft is pressed free of the hub.

Occasionally the splined shaft will be stuck solid in the hub. This may be due to locktite being used (introduced for S3 E Types and XJ6 car, but latter dropped pursuant to a memo from Jaguar), or through corrosion. If loctite has been used, use a soaking heat as suggested by Christopher Storey (an oven), rather than try and apply localized heat.

The following picture below shows my take on the JD7A tool when the job is too tough for the standard screw type JD7A. The arrangement is shown elevated only to show the assembly of the boss with the splined hub.



The following picture shows the opposite handed thread of the other end of the boss with the press mandrel in place.



The following picture show the assembly in place ready for pressure to be applied to the mandrel.



Once the splined half shaft has been removed from the hub, the hub can be removed from the hub carrier by the arrangement shown in the following picture. There is a detailed explanation of this process on this Forum.



There is no reason that the whole process can't be completed without damaging the water thrower.

Regards,

Bill

[kgb123]

Thank you gents for your detailed descriptions of how to proceed. Unfortunately I now have options and as the present Mrs Byard will confirm, I'm never great when I have options.

I'll let you know how I get on and which route was successful.

Kevin