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David Herbert

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David Herbert last won the day on January 19

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About David Herbert

  • Rank
    Lieutenant
  • Birthday 04/02/1954

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  • Location
    Ayrshire, Scotland. previously Suffolk
  • Interests
    Heavy armour, plant, narrow gauge railways.
  • Occupation
    Retired engineer / odd job man

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  1. Or a Christmas Reindeer ? The truck is a Canadian Military Pattern (CMP) Ford with what is called a Number 13 cab (the final style). Probably a 3 ton F60L. The British army had them in considerable numbers. David
  2. Jarrod, Thanks for posting, I hadn't seen that before though I did know of the convoy. A great selection of vehicles. David
  3. In the last two photos at least you can clearly see that at the bottom it is ribbed rubber matting that is not properly glued to the armour. David
  4. If you are looking at modern seals you need an 'R23' type as they have a little lip that helps keep dirt away from the actual seal part. Don't worry about the thickness, just the internal and external diameters measured from the case and the rotating part. It is important of course that the surface that runs against the seal is very smooth or it will chew through any seal in no time. The precise diameter is much less critical as the oil seal will accommodate to it within a small tolerance. David
  5. I think that it is inevitable that some splashed oil will get past the rear bearing, simply because there is nothing to stop it. However it will not be under any pressure and if the rear seal is working the cavity between the bearing and the seal will fill up to level with the bottom of the bearing (a little higher than the bottom of the seal surface) and lubricate both the bearing and the seal as soon as the truck moves. It is certainly there both to stop oil getting out and dirt and water getting in so does need to function. There is no reason not to use a modern seal in its place if you can get one that fits but don't disregard leather seals, they work fine given a smooth surface to seal against, and as long as they are not allowed to dry out by not being used for years at a time. The gearbox looks great though, good find. David
  6. David Herbert

    newguy

    Yes. It's an American WW2 petrol can. David
  7. Well that's a good start. A rolling chassis will turn up somewhere having been a farm trailer or similar. Then you need a transmission and diff. The rest is make-able. Easy ! Good luck, David
  8. Referring to the Mack recovering the AEC tipper it is hard to see how the AEC got rolled because the ground looks relatively flat and big trucks in those days didn't exactly go fast. It is amazing though how even the quite crude colouring of the images does bring them to life. I would also add that the air springs on the MH tractor unit were not that uncommon in the late thirties / early forties, mostly on American trucks but also British ones. Thank you B series for posting these photos. It is good to see photos of such a varied selection of vehicles in the normal course of their use and have a commentary about what the background was. David
  9. Referring to the very rare original PASS plate. I think the seven white circles are where the tin of white paint stood while it was being used ! David
  10. I think that is a correct translation except that it is not American but a British Crusader ! As in the background of the photo above it. David
  11. Looking back through this thread I see only four holes in the crank case for valve tappet guides. I am guessing that the inlet valves are opened by suction against a very light valve spring ? David
  12. I think that the tool in the red case is for measuring the output of diesel injector pumps to check that each element is pumping the same quantity of fuel. It may also be possible to measure the leakoff from each injector by conecting the pipes to the leakoff ports on the injectors. No idea what the blue thing is though. David
  13. Jeremy, What an excellent and full account of this subject. Thank you for posting ! David
  14. Ruxy, Quite right ! Sorry for not reading your post properly. Must try harder ! David
  15. An alternative explanation of the reference to Jewels is that in clockwork watches and high quality clocks it was common to use semi precious stone in tiny pieces as bearings for the shafts that moved relatively quickly. As a measure of quality there would be a marking that proudly announced how many jewels were present. It is possible that early speedometers used jeweled bearings for the needle shaft but the practice died out in the fifties as unnecessary complication. The coal pretending to be the glass seal used to be rubber. Luckily materials have moved on since then. I think that the blue inside of the case is to make the night illumination look less yellow and more white than it would otherwise. We forget just how yellow car headlights used to be before halogen ones came in. David
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