| Also known as | E3878 |
| Diagram | Fig. 3 — OIL PUMP AND RELEASE VALVE; INLET MANIFOLD · ref 1 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1966 |
OIL PUMP
Oil pump for the unit-construction Triumph twin, Triumph part 70-3878, later superseded by 70-6928.
This is the oil pump for the unit-construction Triumph twin, listed under Triumph part number 70-3878 (also seen as E3878 in older records). It shows up in the parts books under the OIL PUMP AND RELEASE VALVE figures, alongside the inlet manifold in some listings, which tells you where it sits in the timing chest area feeding oil through the engine.
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The oil pump is what keeps oil moving through the engine while it's running, and it's not a part you want to gamble on if you're freshening up a motor. Triumph later carried this part forward under a new number, 70-6928, so if you're chasing parts for a bike built after this pump's catalog run, that's the number to look for on the newer side.
Catalog records place this pump across appearances from 1964 to 1966. If your parts book lists a different number for your bike's year, check both 70-3878 and 70-6928 before you order, since they cover the same pump across different points in the production run.
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