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attleej

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attleej last won the day on November 7 2018

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  1. Dear Tim, I concur with John. I would not expect 1400 X 20 tyres to get warm very quickly with a Hippo going at less than 30 MPH and running empty. Is it a harsh ride with you feeling every defect in the road surface or is it a slower frequency bounce? I suspect the former. The tyre pressure in the book will allow for indefinite operation fully laden and in high summer conditions.. If running permanently empty, 60 or 65 sounds sensible. You might try significantly lower but if you go too far the steering will start to get heavy. Out of interest, the tyres on a ballast Antar are 1400 X 24 in twin formation and even though the vehicle weighs 36 tons with ballast, tyre pressure is only 47 PSI. When I was driving 8 Ton Bedford TMs fitted with 1500 X 20 tyres fully laden I would go out with tyres pumped up to about 100 PSI but coming back empty going over very rough roads it made a huge difference to let the tyres down to 50 or maybe even 40 PSI. People following me noticed that I made no effort to avoid pot holes as I did not need to. John
  2. Chris, According to a post on this forum ( that I found by googling the patent number) it is a centurion tachometer. The Meteor IVB drive has a small tacho generator connected to the camshaft. John
  3. Dear All, Please see attached some technical details of this starter motor. John CAV STARTER Scan.pdf
  4. Dear All, Further to my last, I have some tech info on this starter and I will scan it tomorrow. However it is not detailed repair instructions. John
  5. Dear All, Last year I repaired a contactor on an electric forklift by silver soldering a replacement contact in place. You might find repair instructions in a "Power EMER" or Clive may have covered this. If he has not he may well have some literature available to share. At one point this type of starter was quite common and a similar one for a different engine might produce some parts. The only parts that MIGHT be different could be the field coils and the rotating armature. John
  6. Dear All, Further to my last I will try to get a dozen from them. John
  7. Dear All, That is the same part number as for the Meteorite fitted to the Antar. Aviation Jersey probably have them in stock. John
  8. "New NATO" is white with one sugar! Still very useful expression.
  9. Simon, I am very happy to make another special tool. Perhaps a cranked 12 " extension? John
  10. Simon, I have a 250 cfm diesel compressor which would easily make it turn over but not too fast.. John
  11. Simon, My counsel is that you are approaching the task in a very methodical manner. You are using special tools when necessary. You are consulting others including the Explosion Museum and, whilst rare, it is not the Lost Ark. You are not going to negligently muller anything or apply disproportionate force. If you did accidentally damage anything, there is very little that cannot be remanufactured, repaired, drilled and tapped oversize etc. My understanding is that, whilst a fully armed torpedo obviously makes only one run, the practice torpedoes would be used several times and therefore would be overhaulable. As for running it, for the reasons that Richard described, there might be problems using it with a vehicle or without a constant load. Since it has very limited rotating mass and is very powerful, it would over-rev and blow up due to centrifugal force (I know, there is no such thing!). However, given your maritime experience, you could mount it underwater (either at sea or some other suitable place) with a suitably sized propeller to absorb the power. You might need to have a slightly different fuel and / control system but that need only be temporary. In concept, I wonder if it is more a motor driven by compressed air and by letting some fuel into it then gets even more power as a two stroke diesel. I would carry on giving it a 'base overhaul' with a view to running once or twice and then putting it into deep preservation along with records of all that you have learnt. John
  12. Simon, The special tool for the cam plug is in the post to you. We all cannot wait to see what is revealed next! John
  13. Dear All, That last post from Mk3iain is invaluable and I was not aware of the exemption 2, "2. Vehicle is over 25 years old and is not used commercially for carriage of goods." I thought that recent changes in Tachograph rules meant that my 1981 Contractor Tk Tptr had to have a working and calibrated tacho. I was wrong! I use a tacho for two reasons; The first is to be able to prove that appropriate breaks were taken. The other is for fuel consumption and performance records. It is very useful to know the average speed of the transporter and journey time for a particular leg. With the Contractor these are very consistent down to the nearest minute. John
  14. Andy is right. Any armoured fighting vehicle will give lots of engineering challenges and fun. Hot starting problems with a the FV430 range is not something to be worried about. If it does present with that sort of fault there is something slightly wrong and it should be attended to. Out of interest, I am working on John D's FV424 and we had a partially blocked filter on the pick up tube . The tank has already been reduced in size to give better access to electric fuel pump. I am now in process of mounting the pump NEXT to the tank and fitting a shut off valve so that the pump can be attended to without having to partially drain the fuel tank. John
  15. John, As others have said, check for glaze on linings. As for air brake system pressure, this is crucial. Make sure that the unloader valve is cutting out at, at least, the maximum pressure stated in the manual. I have an EMER and can look it up if you need.the correct figure. I think that it should be at least 100 psi. The next point is to fit an air pressure gauge to read the pressure at the front air actuator cylinder. It is possible that a relay valve is not applying absolutely full pressure to the front cylinders. With the brake pedal fully depressed, you should get full reservoir pressure at the cylinders. John
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