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Oz34
United Kingdom
2539 Posts |
 Posted - 26/01/2012 : 09:18:33
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A while ago there was discussion as to whether the rear harness crossed over along the brake cross shaft.
Looking at the well known plan view photo of a rolling chassis for other reasons, I've just noticed a bundle of wiring strapped to the rear trunnion cross tube & quite clearly coming from the N/S chassis rail;
Any comments?
Dave |
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Colin McLachlan
United Kingdom
991 Posts |
Posted - 26/01/2012 : 10:09:32
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When I first bought my PA it had been laid up since the 60s in the hands of the family that had owned it since 1937. When we stripped the body off for its first (and last, I hope) rebuild, the wiring loom crossed from N/S to O/S via the brake cross shaft IIRC, and that's the way we rewired it.
Colin
PA 0613
MG3242
Register No. 2591 |
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ags
United Kingdom
275 Posts |
Posted - 27/01/2012 : 00:54:54
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Hi Dave,
There is also one other oddity about that photograph in that the battery seems to have the positive and negative leads crossing one another. This is not usually necessary and may indicate that the wiring on this car did run down the other side of the chassis or that the terminals on the battery are the opposite hand to the one commonly used today. I had noticed this earlier but it is nicely emphasised in your section of the photograph. I think that I would put these things down to differences between the prototype and later cars.
I do agree with Colin that when I rewired my car in about 1970 the layout was as he described and the tracks were quite clear from the numerous alloy strip wiring clips used to attach the loom to cross members. I confess that, knowing no better, I binned most of those, thinking that they could not possibly be anything but replacements. Today I know from the Parts List that the electrical equipment did include 20 of part no S2/12 "Binding Clip (6 1/4" long)" which is a very reasonable description of the parts which I discarded.
More technical ramblings from
Andrew Smith MMM571 |
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Oz34
United Kingdom
2539 Posts |
Posted - 27/01/2012 : 19:55:20
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Thank you both. Yes Andrew, when Colin was so definite I did begin to think "prototype". A number of the well known photos do seem to be so and perhaps they realised as the brake light wires had to cross there & rear lamp had to cross somewhere, they might as well both go at the same point.
I think Andrew I have one of the "binding clips" & also didn't think it belonged. Perhaps I'd better look it out as a pattern.
Cheers,
Dave |
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ags
United Kingdom
275 Posts |
Posted - 27/01/2012 : 21:17:10
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Hi Dave,
I also probably still have one or more of the clips around somewhere. A fuller description is a soft alloy strip about 3/16" - 1/4" wide, very fine gauge 22 swg or so, in the shape of an elongated "T" with two heads each about 5/16" long and about an inch or so apart. The heads are both slotted such that the tail of the "T" can be slipped through the head. In use the tail is wrapped around the loom and passed through the t-head nearest to the free end and the strip tightened around the loom. The tail can then be passed around a tubular cross member and back through the free head, finally being tightly bent back on itself to secure everything. In total a slightly better (in that the loom is secured clear of the cross member) version of today's nylon cable ties - which is what I used to replace them in all the hidden places.
I did not think that they could be correct as at that time I could still have obtained the alloy type from my kindly Works storekeeper.
Another Sparks' tool from the same era that I find invaluable is a large three-legged Hellerman tool. Originally used for expanding genuine rubber wiring sleeves (pre-shrink-wrap) it is also ideal for enlarging the protective gaiters over the clevis ends of brake cables. It has saved hours of fiddling with bits of wood or shaping funnel type objects. As in all the best occupations the best payment is not money but what you can see a use for and then "borrow"!
More technical ramblings from
Andrew Smith MMM571 |
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Peter Scott
United Kingdom
1240 Posts |
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Oz34
United Kingdom
2539 Posts |
Posted - 27/01/2012 : 23:42:05
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What a superb description of method Andrew! Location noted Peter; thanks.
Dave |
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