| Diagram | Fig. 5 — OIL PUMP, GEARBOX SPROCKET · ref 40 |
| Subsystem | gearbox |
| Listed in parts books | 1969 |
BSA Oil release valve assembly
An oil release (pressure relief) valve assembly from the oil pump/gearbox sprocket area, part number 70-9213.
This is an oil release valve assembly, listed under part number 70-9213. It shows up in the catalog under both the oil pump and gearbox sprocket figures, which tells you it sits in the engine's oil circuit near where the pump and gearbox sprocket area come together.
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A release valve like this one is there to bleed off oil pressure once it builds past a set point, protecting the pump and the rest of the oiling system from being overworked. Our catalog record for this one only ties it to a single year of listings, so we don't have a broad fitment history on file for it.
Given the catalog naming (oil pressure relief valve) and the BSA-style figure grouping, this looks like it belongs to a BSA application rather than a Triumph one. Call the shop and we'll confirm fitment against your machine before you order.
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