| Diagram | Fig. 2 — CRANKCASES · ref 18 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1974, 1976–1980, 1983, 1985 |
BOLT,REAR CASE 69-82,T150
Rear crankcase hex bolt, 5/16-18 x 1-3/4 inch, for the Triumph T150 engine bottom end.
14-6220 is a crankcase bolt for the rear case section, showing up in the CRANKCASE figure of the parts books. It's a hex head bolt, 5/16 inch diameter with 18 threads per inch, at 1-3/4 inch length. This number replaced the earlier factory number 14-0620, so if your parts book or an old box of hardware shows that number, it's the same bolt.
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These bolts clamp the crankcase halves together at the rear of the engine, so they're part of what keeps the bottom end sealed up and holding oil pressure where it belongs. The catalog shows this number appearing across a run of Triumph T150 entries, so if you're working on a triple bottom end and need to replace one or a full set, this is the number to order against.
If you're pulling crankcase bolts for inspection, it's worth checking the rest of the set at the same time — a mismatched bolt in this position is easy to miss until you're torquing things back down.
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