dasatcopthorne Posted December 14, 2018 Share Posted December 14, 2018 Hi Guys. A very basic question please regarding the bufferbeam pipes on diesels, such as the Class 37, 47, 33 etc.? What is the significance of the colours, red, white, yellow? I also notice some have the 'handle' on the left and some on the right. Are the left/right positions standard for each colour or are some on each side for each colour? I need to get my detailing correct. Cheers for any help. Dave Link to post Share on other sites More sharing options...
tractor_37260 Posted December 14, 2018 Share Posted December 14, 2018 (edited) Hi Guys. A very basic question please regarding the bufferbeam pipes on diesels, such as the Class 37, 47, 33 etc.? What is the significance of the colours, red, white, yellow? I also notice some have the 'handle' on the left and some on the right. Are the left/right positions standard for each colour or are some on each side for each colour? I need to get my detailing correct. Cheers for any help. Dave The main air supply pipe is RED - normally to the right of the draw bar hook (looking front on ) There's normally 2 Main reservoir pipes (Yellow) one each side of the draw bar hook. 2 smaller air control pipes (White) close to the Buffers one each side. Steam heat locos would also have a pipe/collector (Silver) next to the RED main air pipe. Early built locos would also have had a vacuum pipe on the BB - some kept this when converted to air-brakes, some had dual brakes. Most of the Air pipes had taps at the BB end of the pipe - normally handed. A photo's better than a thousand words................. Edited December 14, 2018 by tractor_37260 Link to post Share on other sites More sharing options...
royaloak Posted December 14, 2018 Share Posted December 14, 2018 (edited) Main reservoir air (main res for short) is yellow Brake pipe is red control air is (thinner) white (only fitted to some multiple working locos (blue star etc)/ Edited December 14, 2018 by royaloak Link to post Share on other sites More sharing options...
RMweb Gold The Johnster Posted December 15, 2018 RMweb Gold Share Posted December 15, 2018 The red and yellow colour codes also apply to air braked coaches and wagons. Link to post Share on other sites More sharing options...
45125 Posted December 15, 2018 Share Posted December 15, 2018 Be careful with the colour of the air pipes, when first built and up to the start of dual braking, the mains reservoir equalising pipe was not yellow but white and the same applied to the air brake pipe. Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted December 15, 2018 RMweb Gold Share Posted December 15, 2018 The REGULATING air pipe is white! MP12 failure to confuse regulating air with control air. Control air is a constant 70psi , regulating air is between 0 and 52 psi depending on the position of the power controller Link to post Share on other sites More sharing options...
37038 Posted December 16, 2018 Share Posted December 16, 2018 With regard to the side the handles are on, it simply depends on where the pipe exits the buffer-beam and which side would give the best access to operate the handle. Link to post Share on other sites More sharing options...
Steadfast Posted December 17, 2018 Share Posted December 17, 2018 With regard to the side the handles are on, it simply depends on where the pipe exits the buffer-beam and which side would give the best access to operate the handle.Or which shape tap the fitter has to hand...had a really awkward one the other day, where a left handed tap was on a right hand pipe Jo Link to post Share on other sites More sharing options...
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