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Citroen drive shaft oil seal alternative


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You have looked at the insides of more of these gearboxes than me, so its good I am not a betting man :)

If they were machined separately it would be interesting to understand the setup method used as I know of no practical way to do it to the accuracy required to get the two halves centre lines aligned with each other and in the right location versus the diff centre and with the correct bearing interference fit.  

But if done separately it certainly would help explain the assembly issues experienced.

 

cheers

Rohan

 

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  • 3 weeks later...

Upgrade today to remove Google ads and support TLF.

I've now put this gearbox in the car, just because I want to try out the various mods.   Only went 'round the block' for a shakedown as the weather was crap today.   But radial seals seem to be working fine (see original post...)  Also good strong synchromesh.   Need to do longer hot run to see how everything is working and check noise levels.  (That was the original issue - tended to get  a little noisier when hot). 

Something I forgot to mention previously; Even at room temperature the pinion roller bearing outer race can spin in the casting in these boxes (I've seen this on more than one box).    It may well be part of the design to avoid side loading the roller bearing as the case expands or contracts, however, its not something I'm comfortable with, so I have used a medium strength bearing fit compound to fix it in place.  I guess time will tell if that was a wise move....   

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No outer race should ever be allowed to spin.  Using a suitable bearing fit compound is clearly a good idea especially if the fit is at the loose end of the typical tolerance band for this sort of bearing in an alloy housing running at say 130C maximum. 

 

cheers

Rohan

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The original Europa rear wheel bearings were "glued" into the housing with Loctite & if done properly took a lot of hammering to remove :thumbup:

Cheers,

John W

http://jonwatkins.co.uk

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A bit of heat releases the bond with expansion of the alloy. ultimately enough heat will melt the Loctite but you need to be careful not to over heat the alloy. Best to use a hot air gun with temperature control  

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  • 2 months later...

Gearbox tools

Box spanner is 1 7/8" = 44mm   Note how it is reinforced and has a hole cut the same size as the driveshaft, which keeps it perpendicular regardless of torque applied - I use this with good quality Stiltsons.

Additional modification allows a 6mm bar to be inserted/removed which allows the same tool to insert/remove the drive shaft bearing sleeve nut.  Obviously, bar is removable but is secured in place with 2 small orings internally on the box spanner

See also modified 'Draper' open end spanner to remove speedo nut.   If the nut is too tight for this tool, the large black socket (47mm) can be slid over the speedo worm drive and the hardened 8mm 'pucks' are located on the flats of the speedo drive nut.    This has removed very very tight speedo drives.

The aluminium extrusion is used for measuring pinion depth.  (see hole in centre for Depth Gauge and annotated in thou)  It is a extrusion typically used for building 3d printers and is dimensionally accurate and flat measured on a surface plate.   Additional measurements must be taken first with depth gauge to calculate if bearing centreline is true to the machine faces of the bellhousing and gearbox.  (it won't be....)  

Also need a dial gauge to measure CWP backlash and a fishing/luggage type scale to measure diff bearing pre-load

https://drive.google.com/file/d/1xB9RwODHPEonzsY2vUHHh2U4qQqiL5Rq/view?usp=sharing

https://drive.google.com/file/d/1aUpzWZ75dOu5No5pVWwpbhE6sqzAmM5f/view?usp=sharing

https://drive.google.com/file/d/1neE_DnKNlGqGgNLTLGUJuHFMWCgDIX_v/view?usp=sharing

https://drive.google.com/file/d/1VrYeSqxn4YGBZsjj29q4CJHgvP9ohx_W/view?usp=sharing

https://drive.google.com/file/d/14k5qNFuABytUADLamN_A9qoXGZNT40UN/view?usp=sharinghttps://drive.google.com/file/d/1yoK7t7FZfPX44pY2w5doCk5iZvrPcBo2/view?usp=sharing

https://drive.google.com/file/d/15UIEzMIt1dWvvnv4uPiE2SBPCExEWjKC/view?usp=sharing

https://drive.google.com/file/d/1dwv6QrMPSw_hPYBHwol4EwbtEZ6n_Mgl/view?usp=sharing

https://drive.google.com/file/d/1bE222iXNLO9ZapvKwKTqe6oICzcXBRXZ/view?usp=sharing

Edited by 910Esprit
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