| Also known as | T489 |
| Diagram | Fig. 8 — GEARBOX SHAFTS AND GEARS · ref 19 |
| Subsystem | gearbox |
| Listed in parts books | 1964–1965, 1967, 1971 |
Circlip .
A gearbox internal circlip that retains gears or washers on the shaft, later superseded by part 70-0489.
This is a circlip out of the gearbox internals, listed in the parts book figure covering the gearbox shafts and gears. Circlips like this one hold gears, bushes, or thrust washers in their proper position on a shaft so they don't walk sideways under load and throw the gear train out of alignment.
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The part carries the legacy number T489 in older parts books, which is the pre-1973 style prefix for the same physical piece, now cataloged as 57-0489. The record shows this number was later superseded by 70-0489, so if you're chasing this circlip down and only find 70-0489 in a supplier's listing, that's the same part under its later number.
The catalog entries span gearbox work from the mid-60s into the early 70s, but we don't have a breakdown of which specific model or year needs this exact circlip versus a different one in the same shaft assembly. If you're rebuilding a gearbox, check what you pull off the shaft against this number before ordering, or call the shop and we'll help confirm.
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