| Also known as | T2557 |
| Diagram | Fig. 12 — CLUTCH AND CLUTCH OPERATING MECHANISM · ref 7 |
| Subsystem | primary |
| Listed in parts books | 1969–1974 |
Breather tube
A breather tube from the clutch and clutch shock absorber assembly, also known by its earlier T2557 designation.
57-2557 is a breather tube listed against the clutch and clutch operating mechanism, and also shows up in the clutch shock absorber figure. In practical terms this is the small tube that lets crankcase or primary chaincase pressure vent off rather than build up and push oil past seals. Older parts books carry it under the T2557 designation, same physical part.
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It turns up across catalog entries running from 1969 to 1974, which tells you the part had a long run in the primary/clutch area during that stretch, but we don't have a specific model tied to it in our records. If you're chasing this for a rebuild, check the tube against your own clutch housing before you order, since the catalog doesn't spell out which exact machine it was drawn for.
A breather tube like this is a simple item but worth getting right - the wrong length or fit can leave the primary case pressurizing when it shouldn't, which shows up as oil leaks or seepage down the line.
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