Re: Looking for Bob Grunau

[FrankGraham]

I have e-mailed the message below to Bob Grunau off list twice over the past few weeks and haven't been able to get a response. Does anyone know if he is away? He did post a message on this list only a week ago. Maybe someone on this list who has used his rear axle nuts and seals can answer my questions. Bob, Regarding your TC replacement 2" hex rear bearing hub nuts with seals, can these be used with stock axle shafts and hubs or are your tapered axles and hubs required? I replaced both half shafts, hubs, and the bronze bushings with new ones from Abingdon spares and NOS R&M rear bearings just a few years and very few miles ago and I don't want to replace them if at all possible. The brakes have been dry until now but a slight seepage has started coming from either the bearing hub seal or the splined hub to bearing carrier paper gasket on the right side. I suspect that the machined surface on the axle housing is too scored to allow the carrier seal to work properly. I also realize that I only have about 90 'lbs of torque on the axle nuts not 140 as you recommend and that may be contributing to the problem. If I understand your setup the new nuts seal off the rear end oil from entering the bearing carrier completely. I assume that your tapered shafts have a micro finish surface just inboard the hub for the seal to run on. Could I use a speedi sleeve on a stock axle shaft to the same effect? How do the bearings get lube, do you drill and tap the carrier for a grease fitting or just pack them as is done on the front hubs? Are you able to supply or know the part number for a speedi sleeve for the rear axle housing itself and if there is a double lip seal available to replace the stock seal, since I may still have a problem keeping grease from escaping the carrier even if I am able to use your axle nuts with seals? Thanks, -- Frank < frankgraham@msn.com > ______________________

[Terry Horlick]

Frank, I am not Bob and am not an expert on this, but I am running a stock axle shaft on the left and a Bob Grunau shaft on the right. Both sides have Grunau nuts and seals with no leakage. The stock shaft has a speedi-sleeve. I found that pushing the sleeve over the splines causes the sleeve to follow the splines giving a lumpy surface which cannot possibly seal. What I ended up doing is filling the splines in with epoxy, building it up larger than the axle. Then I chucked up the axles in the lathe and carefullyturned the epoxy down and stopped when I got to metal. Then when I pushed the sleeve into place it was perfectly round and smooth. I have had no problem with them. The bearings were replaced on both axles with sealed bearings which need no lubrication. I hope this helps you. Terry TC2285 --- In mg-tabc@yahoogroups.com, "FrankGraham" wrote:

> I have e-mailed the message below to Bob Grunau off list twice

over the past

> few weeks and haven't been able to get a response. Does anyone

know if he is

> away? He did post a message on this list only a week ago. Maybe

someone on

> this list who has used his rear axle nuts and seals can answer my

questions.

> > Bob, > Regarding your TC replacement 2" hex rear bearing hub nuts with

seals, can

> these be used with stock axle shafts and hubs or are your tapered

axles and

> hubs required? I replaced both half shafts, hubs, and the bronze

bushings

> with new ones from Abingdon spares and NOS R&M rear bearings just

a few

> years and very few miles ago and I don't want to replace them if

at all

> possible. The brakes have been dry until now but a slight seepage

has

> started coming from either the bearing hub seal or the splined hub

to

> bearing carrier paper gasket on the right side. I suspect that the

machined

> surface on the axle housing is too scored to allow the carrier

seal to work

> properly. I also realize that I only have about 90 'lbs of torque

on the

> axle nuts not 140 as you recommend and that may be contributing to

the

> problem. If I understand your setup the new nuts seal off the rear

end oil

> from entering the bearing carrier completely. I assume that your

tapered

> shafts have a micro finish surface just inboard the hub for the

seal to run

> on. Could I use a speedi sleeve on a stock axle shaft to the same

effect?

> How do the bearings get lube, do you drill and tap the carrier for

a grease

> fitting or just pack them as is done on the front hubs? Are you

able to

> supply or know the part number for a speedi sleeve for the rear

axle housing

> itself and if there is a double lip seal available to replace the

stock

> seal, since I may still have a problem keeping grease from

escaping the

> carrier even if I am able to use your axle nuts with seals? > > Thanks, > > -- > Frank > < frankgraham@m... > > ______________________

[FrankGraham]

Terry, An interesting solution to getting the speedi-sleeve over the splines. Trying to think my way through how this setup must work I had assumed that a sleeve was the only way to get a seal to work on a stock shaft. Unfortunately my 10" Logan lathe only has a 3/4" through hole in the spindle so I can't turn an axle shaft on it. In the fall I will have access to a 16" LeBlonde lathe so this could turn into a winter project. I take it that it is not too difficult to get all of the epoxy out of the splines after the sleeve is in place. Did you put some grease or oil in the splines first to keep the epoxy from sticking too well? I still don't understand how the bearings get lubed if the oil can't get past the seal on the shaft, do you pack the bearings with grease? Also do you or anyone else know the part # for a speedi-sleeve to fit the axle housing so that the standard oil seals will work effectively? Even with grease in the bearings I still need an effective grease seal between the bearing carrier and the axle housing. On my Twin Cam and Deluxe I used a double lip seal to replace the standard seals and these have worked very well. Does anyone know if Federal Mogul makes a double lip seal that will fit the TC bearing carrier? Thanks, -- Frank < frankgraham@msn.com > ______________________

[Bob Grunau]

Hi Frank, I've been away for a few days. Yes the 2" hex nuts and seals seal off the diff oil from the wheel bearings . Therefore you need to install double sealed and pre-lubed wheel bearings. SKF-6208-2RS, 9 ball type or SKF-M208-2RZ, 12 ball type. I guess you could use the original grease fitting inside the rear hub and lubricate the bearings that way. However most, if not all, replacement hubs available recently have deleted this grease fitting. Therefore you could pack the bearings with grease. Use of double sealed ball bearings is a surer way of keeping grease off the brakes. To use the bearing nut/oil seals on the original splined axles you need to install a 1" CR Speedi-Sleeve to cover the inner hub splines. I have not done this installation but I see from other responses that the job has been done using epoxy to give the Speedi-sleeve a solid backing. Normally the seals run on a polished area of my tapered axle shafts. I don't know of a double lip seal . Not sure where the 140 ft-lbs torque came from, I think I have been saying 125 ft-lbs?? Hope this helps. Bob Grunau Bob, Regarding your TC replacement 2" hex rear bearing hub nuts with seals, can these be used with stock axle shafts and hubs or are your tapered axles and hubs required? I replaced both half shafts, hubs, and the bronze bushings with new ones from Abingdon spares and NOS R&M rear bearings just a few years and very few miles ago and I don't want to replace them if at all possible. The brakes have been dry until now but a slight seepage has started coming from either the bearing hub seal or the splined hub to bearing carrier paper gasket on the right side. I suspect that the machined surface on the axle housing is too scored to allow the carrier seal to work properly. I also realize that I only have about 90 'lbs of torque on the axle nuts not 140 as you recommend and that may be contributing to the problem. If I understand your setup the new nuts seal off the rear end oil from entering the bearing carrier completely. I assume that your tapered shafts have a micro finish surface just inboard the hub for the seal to run on. Could I use a speedi sleeve on a stock axle shaft to the same effect? How do the bearings get lube, do you drill and tap the carrier for a grease fitting or just pack them as is done on the front hubs? Are you able to supply or know the part number for a speedi sleeve for the rear axle housing itself and if there is a double lip seal available to replace the stock seal, since I may still have a problem keeping grease from escaping the carrier even if I am able to use your axle nuts with seals? Thanks, -- Frank < frankgraham@msn.com > ______________________ Yahoo! Groups Links