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#21
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Quote:
The small (214 cu in petrol) was really just a car engine. There was a 'keyhole' in the front bumper - click on the following then click on the image to enlarge it then look above the first 7 on the front number plate:- http://upload.wikimedia.org/wikipedi...xtra_shine.jpg Last edited by G-CPTN; 1st February 2014 at 12:30. |
#23
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Can you explain a bit about how the air brake foot valve works? It has two air supplies from two independent tanks and two pipes to the servo on the master cylinder. I'll grab a picture if you need it.
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Cheers Myles TK restoration blog: http://www.mig-welding.co.uk/forum/t...dford-tk.43480 |
#24
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A diagram:- http://lh6.ggpht.com/_Ii1ukGkfijY/Sq...jpg?imgmax=800 Quote:
Does that answer your question - or would you like a more detailed explanation? Last edited by G-CPTN; 23rd November 2014 at 19:42. |
#25
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More detailed if possible please, particularly the TWO air lines to the servo. Does it use air pressure in both directions, like a double acting ram for applying AND releasing the brakes. The two ports on the servo are in quite different places, one in the end of the cylinder shape and the other about half way along on the circumference.
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Cheers Myles TK restoration blog: http://www.mig-welding.co.uk/forum/t...dford-tk.43480 |
#27
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Here's a rather crappy picture but it shows the two airlines going into the servo.
__________________
Cheers Myles TK restoration blog: http://www.mig-welding.co.uk/forum/t...dford-tk.43480 |
#28
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One airline feeds the 'front' piston and therefore has to be positioned halfway along the servo body whilst the other airline feeds into the end of the servo body and feeds the rear piston.
Because of the design of the pistons within the servo, each of the air supplies can operate the master cylinder. |
#29
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Brilliant! I understand now. There is a further question I have about the hand brake circuit and those COVs but I'm not sure what it is yet! Thanks for your help, it is much appreciated.
I lifted the engine and box out on Saturday, BLIMEY that's a heavy lump, my front end loader would only just lift it.
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Cheers Myles TK restoration blog: http://www.mig-welding.co.uk/forum/t...dford-tk.43480 |
#30
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Change-Over Valves are 'either or' - that is they pass air from either of two circuits to whatever is downstream. The valve prevents back-feeding into the 'other' supply circuit.
Think of it as a shuttle-valve. Are you, perhaps, confusing a Quick-Release Valve? This is normally in a circuit where 'quick-release' is desirable (such as a spring-brake parking supply - or rear airbrakes). When pressure is applied a diaphragm is held over the exhaust port so that the air supply can be passed downstream to the actuator - when the input pressure disappears the spring lifts the diaphragm off the exhaust port allowing the residual air to escape directly rather than having to return 'upstream' to the application valve exhaust port. |
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