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Adrian Barrell

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Posts posted by Adrian Barrell

  1. The only military vehicles exempt from testing by their nature are:-

     

    Goods vehicles over 3.5 tonnes gross pre 1960 used unladen and tracklaying vehicles steered by their tracks. There are lots of vehicles running around with 'test exempt' on their V5 that perhaps shouldn't have but who are we to argue!

     

    Taxation class can also give you an exemption, this is also up to interpretation....

  2. Adrian - that sounds interesting, how is it down and how would you know that you have done it - once you have done it :dunno:

     

    Cheers

     

    Jack.

     

    Well Jack, probably the first thing to do is establish what your engine is set to. Get hold of a neon timing light, find the original timing marks, which are on the damper ring in front of the lower pulley if I remember correctly and mark them with white paint or tipp-ex. You should have DC or TDC to indicate top dead centre for No 1 cylinder on the firing stroke i.e with both valves shut. There should be some other lines marked to indicate degrees before TDC to time the spark to.

     

    You clip the pick up over the no 1 cylinder spark plug lead with the arrow on the pick up pointing towards to spark plug. Then connect the two small leads to a battery. Probably needs to be a 12V supply and doesn't need to be the vehicle battery. Making sure all the leads are clear of any rotating bits, start the engine and shine the neon light at the timing marks. Mind the light and your fingers in the fan! The light will flash and illuminate the marks making them appear stationary.

     

    This shows you your current ignition timing, assuming the pointer is not bent out of position..... With the engine stopped, loosen the distributor clamp at its base just enough to allow you to turn it. With the engine running, turn the distributor in the opposite direction to the rotor direction, usually anti-clockwise, to advance the ignition. If it was a bit retarded, you should have a small increase in idle speed. You should be able to run at 4 to 6 degrees more advance than the book figure. But..... if you advance too far, you will get pre-ignition. This is bad! Also known as pinking, you can hear it under load as a ticking, ringing sound. This will damage your engine and it may also be hard to start if too far advanced. It's best to advance a little and try it on the road.

     

    Sorry if you know all this already, but it worked well for me.

  3. I used to run my GMC at 40 mph simply because I got 9mpg and it ran at 170 deg. If I ran it at 45, which it did quite happily, the temperature went up to 180 and the fuel consumption also suffered! Driving any slower than 40 made it hard(er) to get up hills etc. Using the momentum of the vehicle is half the battle.

     

    One thing to check is ignition timing. A lot of people set the distributer according to the manual forgetting that setting is for something like 72 octane. Modern fuel allows you to advance the timing quite a bit and it makes quite a difference to power output and fuel consumption.

  4. I've not heard that about the trailer being a load for the tractor. Something else to ask about at the test station...

     

     

    I've had a quick look through my books and can't find anything relevant so it may be apocryphal or my failing memory..... :whistle:

    Not sure if the testing station staff would know either, I suspect you will get several opinions!

  5. I'm not saying it's not done or that the authorities will not allow it, just that, I seem to remember reading in official paperwork that an articulated trailer is considered a load for the tractor unit whether laden or not. Quoting Diamond T and Rogers combinations is a complete red herring as they are not an articulated rig.

  6. A runaway (dieselling) engine still requires oxygen to burn the oil, so you can stop one by covering the air intake with a suitable piece of wood or metal.

     

     

    Indeed, the twin Detroits in the M4A2 Sherman and M10, which are prone to sucking oil through the blower shaft seals, have a solenoid operated flap in the blower air inlet as an emergency stop. I think the later vehicles had it deleted and certainly many engines you see now do not have it but it always seemed a good idea to me

  7.  

     

    Not strictly true the two are not connected, a 22-ton recovery truck is exempt from plating but still requires a class "C" to drive it

     

     

     

     

    I was refering to the age related exemption, i.e. pre 1960 used unladen.

  8. The exemption from Plating and testing for our stuff is as follows:-

     

    Goods vehicles first used before January 1 1960, used unladen and not drawing a laden trailer and trailers manufactured before January 1 1960 and used unladen.

     

    So, if you pull a trailer with a load on, you are not exempt for the truck or the trailer. Regarding an articulated vehicle, the trailer is considered a load for the truck even if the trailer is empty.

    The exemption for testing also removes the need for an HGV licence to drive it.

    In the real world you can get away with a lot simply because most people in the relevant government departments don't know the regulations. It's all good till there is a problem such as the unfortunate accident in Holland mentioned elsewhere. Then the police and your insurance company get very interested in the letter of the law....

  9. Mick,

    Is that a canadian made sherman? the symbol on the front looks like a Montreal locamotive works stamp.

     

    James

     

    The logo on the front is the General Steel G in a shield mark. This was the US company that supplied the castings. It can be found on various armoured vehicles, not just Shermans. You are right about it being a Canadian sherman though, it's a Grizzly I, built by Montreal Loco. Now masquerading as a sort of Firefly.

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