Collar for semi-floating axles

[Lotz-A-Landies]

A mechanic friend has a customer present his 1955 S1 for failed seal on rear axle. Upon disassembly the collar was found to have migrated down the halfshaft and was sitting next to the diff. The bad thing is that the part was purchased from a usually reliable supplier and fitted by another supplier/mechanic. Neither will be named.

The problem is that the replacement had to be manufactured locally and instead of machining the ID it was drilled leaving 0.005" oversize instead of a tolerance fit (usually 0.0005" undersize).

A local engineering shop is prepared to manufacture the item using a CNC lathe and a good condition original assembly is being dissassembled to check the hardness of the component and double check sizings. The price estimate is about $50 each ATM, but the more made in the batch the cheaper each will become.

Four collars have been ordered by the seminal customer and I have ordered a further 2 for myself to keep as spares. Anyone interested in any for themselves, need to contact me before midday tomorrow and the batch will proceed.

Diana

LRSeries1@optusnet.com.au

[series1buff]

It is one of those awkward things about early Land Rovers that we all face at some point .

In my case . I made up the special collar puller device and it worked well. I hoped to re-use the original collars and after asking a experienced mechanic friend, he said it would be OK . I checked the tolerences before re-assembly and I came up with a bang on .006 interference fit . Luckily the seal surface area on the collars was in good shape, no scoring .

The big mistake I made was using bearings of dubious quality . As it's a pain of a job, you want to use the best you can afford . I've been told certain Ferguson tractors use the same rear hub bearing .. and F100's as well - Is that correct ?

I used a 20 ton press for assembly and it really struggled to do it . I managed to bend the heavy plate used to assemble the thing as suggested in the manual.

I've heard of horror stories of mis-fitting collars - one supplier sells them it seems in a miss and hit fashion..you takes your chances and see what comes in the mail - if it fits correctly your lucky .

Mike

[Lotz-A-Landies]

The batch is 10 collars ATM.

[LRO53]

I got one of these collers from Four Wheel Drives Melbourne. Around 6 months ago. Peice of crap just slid right down the shaft. Could not be bothered to go through the hassels to return it....

Got a Britpart coller from England Perfect! $18 AUD!

Here's a good one:

How much do you think an exhaust for an 80" is?

Try $291.65 Landed in Australia - John Craddock Limited UK

That's the Full Exhaust- Engine Pipe, Silencer, Shields
Bolts straight on! No messy pots and pans. Maybe a local exhaust shop might be able to do cheaper but this is correct and fits 100%

And Four Wheel Drives want to charge $203 for the Engine pipe and $143 for the Muffler! That's not including postage! Crazy......

[Lotz-A-Landies]

When we looked on Craddock's site the semi-floating axle collar (Rover part 07297) was not recognised same with Dunsfolds.

Did you get the Brit part from a local distributor like Rovacraft or British Motor Imports?

Diana

[LRO53]

Part Number: 90217398

90217398 FRONT HALF SHAFT COLLAR | shop | www.lrseries.com | L. R. Series

[gromit]

I used a pair from Four Wheel Drives and they fitted OK.
They came sealed in a plastic bag inside a cardboard box, FWD's carefully removed them from the boxes and just gave me the collars in the plastic bags. I guess the manufacturers details were on the box and they didn't want me to see this.
Only one size (not stated) was available so it either fits OK or it doesn't. Also had to polish the surface where the seal runs because as supplied it looked like the seal would be quickly damaged by the rough finish.

It would make sense to get a batch made locally but the ID would have to be matched to each axle to get the correct interference fit and the correct grade/hardness of steel used.

The other solution is to do what the previous owner had done to mine, weld the old collars back in place
I used a 20T press to press the collars on but had to grind through & split the originals (once the weld had been ground off), some pictures are in this thread Getting the Series 1 Ready for Cooma

The bearing is readily available (Mike, I was also told it's an F100 wheel bearing) from any bearing shop. I have the bearing number at home if anyone needs it.

Colin

[Lotz-A-Landies]

Part Number: 90217398

90217398 FRONT HALF SHAFT COLLAR | shop | www.lrseries.com | L. R. Series

Thats the FRONT half-shaft collar. In the 1954 - 1957 parts catalogue its listed as Rover 217398 (which is the same part number as in the series 2/2a parts catalogues for Front halfshafts)

HOWEVER in the 1954 - 1957 parts catalogue the rear axle "Hub retaining collar" is listed as Rover Part 07297 a different number. Now I don't know what the difference is, but I'm pretty sure Rover would not have made a new part and new part number if the two collars were the same.

On the fitting collars to axles to check interference fit, that sounds a bit shonky to me. If axle half-shafts had different diameters at that point then we'd also have to match wheel bearings to half-shafts and it is plainly clear that we don't do that. It is a factor of poor engineering practices that have allowed the collars to be made with different ID.

I used a pair from Four Wheel Drives and they fitted OK. ...

I got a collar from them and it was loose on the half-shaft so I had to send it back. My guess they must have acquired that batch from the same mob as the other one came from.

Diana

[chazza]

My manual says that the collars are a "selective fit".

One that I bought was too big so I made my own on the lathe with a 0.003" interference fit. I think it is good advice to use Loctite Shaft and Bearing mount on it when assembling. The hardness of the one I bought was pretty soft (using a centre punch test) so I used mild steel, working on the premise that steel is harder than the seal and I can always make a new one anyway

Cheers Charlie

[JDNSW]

My manual says that the collars are a "selective fit".

.......... The hardness of the one I bought was pretty soft (using a centre punch test) so I used mild steel, working on the premise that steel is harder than the seal and I can always make a new one anyway

Cheers Charlie

The hardness of the seal is a lot less than the hardness of the collar made of any type of steel - but the problem is that the hardness of the collar is less than that of the most common form of grit from the road - quartz - except in the case of very hard steel. What happens is that minute particles of quarts get embedded intyo the seal, turning it into an abrasive grinding tool. For long life, it needs to be as hard as practical.

John