VC refills for Cancer Research UK

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Re: VC refills for Cancer Research UK

Postby silverbullet » 01 Aug 2014, 07:14

1986 syncro locking front diff model, Illustration 50-20:

N 010 332 4, Hex headed bolt, M8 x 32, 10 req

Diff front cover (not that you need to get in there anyway) N 010 242 22, hex head bolt, M8 x 25, again 10 req.

There is a slightly shorter M10 bolt for the single front nose mount, the two side mounts and the pinch bolts across the top rear mount tube "banana" are all the same length.

If ETKA is to be believed :lol:
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Re: VC refills for Cancer Research UK

Postby Aidan » 01 Aug 2014, 17:33

bolts are all same length but two of them should really have been specified longer as they have the dowel inserts in the case holes so less useable threaded section often get stripped, the two just above the middle on the nosecone
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Re: VC refills for Cancer Research UK

Postby silverbullet » 02 Aug 2014, 12:37

The last two for Aidan before I am away. Curious details:
Early on the left (full set of internal teeth, ground spacers, shims) Late marked 39/89 on right (interrupted teeth, stamped spacers, no shims)
Both take exactly the same time to fill, so I can only think that the interrupted teeth were either to speed up manufacture or to tweak the characteristics of the VC by increasing the internal volume.
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Re: VC refills for Cancer Research UK

Postby ermie571 » 04 Aug 2014, 09:27

ok. Blonde moment.

Jed - you talk about a swap? I din't have one to swap....so can the van just sit there without it ok? Chap ^^ asked if it can be driven...Iooking forward to an answer on that!

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Re: VC refills for Cancer Research UK

Postby Aidan » 04 Aug 2014, 10:28

yes Emma it is fine to run with no VC in no and propshaft on, speedo will still work as front diff is being turned by the wheels
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Re: VC refills for Cancer Research UK

Postby Aidan » 04 Aug 2014, 10:29

yes Emma it is fine to run with no VC in no and propshaft on, speedo will still work as front diff is being turned by the wheels just ensure there is oil in there 1.5 litres total
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Re: VC refills for Cancer Research UK

Postby silverbullet » 26 Aug 2014, 10:18

Latest news.

Lab scales went off for repair almost 4 weeks ago but a paperwork cockup at the electronics company :roll: resulted in non-actioning of 3rd party repair/recalibration request (if possible) while I was away.

All a bit frustrating as I can't do a thing without them. Should have an answer in 48 hrs...

PS Just to clarify: the price of £252 is all-inclusive, we take care of the charitable donation at this end.
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Re: VC refills for Cancer Research UK

Postby silverbullet » 10 Sep 2014, 16:14

Now hear this...

Before anyone sends me another VC please please please package it properly!

Ideally in a 1/2" thick min. plywood box lined with high-density foam; next best thing would be in a suitably heavyweight box, surrounded on all sides by 1-2" of styrofoam and with the VC wrapped in multiple layers of corrugated card. The VC must be snug in the box, not rattling around!

Reason? I have recently had the unpleasant experience of having to take a lump hammer and mandrel/punch to a pair of units where, due to inadequate packing and poor courier handling (dropped onto a hard surface) the lip above the big circlip had been dented and bent inward by about 2-3mm in several places.

I managed to beat the dents back, release the clip and salvage the lids and internals; but the cases are now scrap because they are no longer round, so I cannot guarantee they would ever seal properly. Fit for display purposes only.

You have been warned.
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Re: VC refills for Cancer Research UK

Postby silverbullet » 10 Sep 2014, 16:28

PS

No need to panic if you sent one in a few weeks back, all involved parties are informed and replacements have now been sourced.

We just don't need unnecessary wastage for the sake of a bit of care and forethought :wink:
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Re: VC refills for Cancer Research UK

Postby silverbullet » 12 Sep 2014, 16:23

It hasn't taken long, but I have already been forced to start scrapping parts. Most (nearly all) of the damage is due to careless handling and DIY dismantling with the wrong tools/techniques.

A few pointers to nip this in the bud:

1. Corrosion to centre shaft seal face.
Having removed the VC from the diff, don't use Jizer or water-based detergents to clean off the EP, it just gets in where you can't dry it and starts rusting. Wash it down in paraffin to remove the worst of the oil, spray with a bit of WD-40, wrap in a plastic bag and store in a dry, damp-free environment until you need to ship it.

2. Damaged splines.
Using a big screwdriver and hammer to try and drift the shaft up and pop the lid out (after removing the big circlip) doesn't work, there is far too much hydrostatic pressure at work even with the filling plugs out: it just bruises the diff pinion shaft splines. Leave it all well alone.

3. Gouges and scratches in X-seal bores.
Again, a screwdriver or stanley knife isn't a carefully applied seal pick tool. So as per #2, don't try and lift the lid, leave it alone.

4. Dented cases. You all know about this now. Pack 'em properly :ok

In short: trying to open them just to empty out the cack, in the mistaken belief that you are saving a bit of time is a false economy. There is also the risk of the loose parts being damaged in-trans. It takes me a few minutes to open/separate them and then they drain for 24 hours before I start cleaning them properly.
When I say clean, I mean fresh-from-the-dishwasher clean!

I will have to charge for replacement bits on a pro-rata basis and start buying up cores units. Prices TBC.
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Re: VC refills for Cancer Research UK

Postby silverbullet » 19 Feb 2015, 16:53

Got to wear overalls for a few hours today and reaquaint myself with the unimaginable stink from these two:
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Business as usual.
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Re: VC refills for Cancer Research UK

Postby silverbullet » 19 Feb 2015, 17:01

PS Aidan thought that a few archive pics of what to check for in a suspect or unknown VC would be handy. These following show the telltale signs of seal failure and what it indicates.
Fir tree of rubber in the seal drain holes:
Image
Strings of rubber may also be seen:
Image
Inside, the overpressure VC has partially blown the seal over and twisted it in the groove, shredding one or more lobes of its X-section:
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Re: VC refills for Cancer Research UK

Postby silverbullet » 02 Mar 2015, 16:08

Best customer packaging so far:

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Re: VC refills for Cancer Research UK

Postby bene » 28 Jun 2016, 11:05

Hey Ian,
A friend of mine is looking into getting his VC refurbed... it is not tight, it does not work at all.
Are you still doing the refurbs?
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Re: VC refills for Cancer Research UK

Postby silverbullet » 28 Jun 2016, 16:31

Chap called Mike? If so he has already been in touch :ok
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