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hello from a state of disassembly.
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<blockquote data-quote="Hugo Myatt" data-source="post: 10215" data-attributes="member: 99"><p><strong>Chain oiler</strong></p><p></p><p>The chain oiler pipe (A69AS) is a cadmium plated steel pipe of, I think, 5/16” ID fitted with a tapered nipple and a ¼” BSP union nut as used on the petrol tap pipes. The pipe, of approximately 13”long, is steel to avoid fatigue breakage as it is only supported at one end where it screws onto the Tank Breather Adaptor (T 29), which in turn screws into the UFM. The pipe leaves T29 and gently snakes its way down, inboard of the rear carburettor stub then forward of the battery carrier ending in an almost 90 degree curve and nestling in the crease formed between the back of the gearbox and the upper rear gearbox stud boss. From here it projects slightly beneath the upper run of the chain and (theoretically) drips onto the lower run. Often some fettling is needed for if the chain is slack the top run can foul the chain oiler pipe and cause an alarming and mystifying noise that is transmitted through the UFM and is difficult to identify. Although the spares list drawing (M018) shows the chain oiler having a splendidly regular shape I have never come across two exactly the same. It looks as if they were bespoke to each machine rather than made on a jig. The Tank Breather Adapter (T29) is a pesky little critter for though it is easy to screw into the UFM, once the oil pipe has been fitted it is difficult to unscrew the oilpipe again without unscrewing T29 with it. This is because the hexagon on the T29 is at the upper end and shrouded by the UFM and once the oiler pipe is in place it is impossible to get a ring spanner on to T29 to hold it in place whilst you unscrew the oiler pipe. The chain oiler on the Comet is naturally quite a different shape altogether. Series Ds had to make do with just 18” of rubber hose.</p></blockquote><p></p>
[QUOTE="Hugo Myatt, post: 10215, member: 99"] [b]Chain oiler[/b] The chain oiler pipe (A69AS) is a cadmium plated steel pipe of, I think, 5/16” ID fitted with a tapered nipple and a ¼” BSP union nut as used on the petrol tap pipes. The pipe, of approximately 13”long, is steel to avoid fatigue breakage as it is only supported at one end where it screws onto the Tank Breather Adaptor (T 29), which in turn screws into the UFM. The pipe leaves T29 and gently snakes its way down, inboard of the rear carburettor stub then forward of the battery carrier ending in an almost 90 degree curve and nestling in the crease formed between the back of the gearbox and the upper rear gearbox stud boss. From here it projects slightly beneath the upper run of the chain and (theoretically) drips onto the lower run. Often some fettling is needed for if the chain is slack the top run can foul the chain oiler pipe and cause an alarming and mystifying noise that is transmitted through the UFM and is difficult to identify. Although the spares list drawing (M018) shows the chain oiler having a splendidly regular shape I have never come across two exactly the same. It looks as if they were bespoke to each machine rather than made on a jig. The Tank Breather Adapter (T29) is a pesky little critter for though it is easy to screw into the UFM, once the oil pipe has been fitted it is difficult to unscrew the oilpipe again without unscrewing T29 with it. This is because the hexagon on the T29 is at the upper end and shrouded by the UFM and once the oiler pipe is in place it is impossible to get a ring spanner on to T29 to hold it in place whilst you unscrew the oiler pipe. The chain oiler on the Comet is naturally quite a different shape altogether. Series Ds had to make do with just 18” of rubber hose. [/QUOTE]
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