| Also known as | E4590 |
| Diagram | Fig. 23 — OIL TANK · ref 12 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1965 |
Oil pipes and junction block
Oil feed pipe and junction block assembly from the oil tank, connecting tank to pump on 1964-65 catalog listings.
This is the oil pipe and junction block assembly that sits in the oil tank area of the bike, tying the feed and return lines together at the pump. It's the fitting that routes oil from the tank down to the pump and back, and it shows up in the parts books under the OIL TANK figure for the 1964-65 model years. The older E4590 stamping is the same physical part under the earlier letter-prefix numbering system Triumph used before switching to the numeric format.
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On these bikes the junction block is a small but important connection point in the oiling system - if it's cracked, stripped, or missing its sealing surfaces, you can end up with an air leak or oil leak right at the tank fittings. Worth a look any time you're doing oil tank work or chasing a wet-sump complaint on one of these.
We show this part appearing across two catalog listings spanning 1964 to 1965. If your bike falls outside that window, call the shop and we'll check whether your parts book calls for this number or a later junction block before you order.
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