| Also known as | W135 |
| Diagram | Fig. 17 — FRONT WHEEL · ref 24 |
| Subsystem | wheels |
| Listed in parts books | 1960–1962, 1964–1970, 1974 |
BRAKE RETURN SPRING
The return spring that pulls the brake shoes back from the drum on Triumph front and rear drum brakes.
This is the brake return spring, 37-0135, the small coiled spring that pulls the brake shoes back off the drum once you let off the lever or pedal. It shows up across a long run of front and rear drum brake figures in the catalog, from quickly-detachable rear wheel setups to the front wheel assemblies on the T100 and 6T/T120 family, which tells you this one spring did double duty on a lot of different wheels over the years.
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It's a simple part but an easy one to overlook when you're rebuilding a hub. A tired or stretched return spring means the shoes don't retract fully, so you get drag, uneven wear, or a brake that feels like it's dragging even with everything else adjusted right. If you're in there doing shoes or relining a drum, it's worth putting a fresh one in rather than reusing whatever's already been in there for decades.
You'll also see this part numbered as W135 in older parts books - same physical spring, just the legacy prefix form. Given how many different wheel and brake figures it appears in, it's a good idea to have us confirm which drum setup you're working on before you order, just so you don't end up with the wrong spring for your specific hub.
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