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Here the same shaft after the new piston and shims have been installed. The piston is the big black donut with the small holes around the outside edge. The washer-looking thing on top of the piston is a shim. This assembly goes inside the internal-tube of the damper, which in turn goes into the main tube. Got it?
Damper Revalving

Here the same shaft after the new piston and shims have been installed. The piston is the big black donut with the small holes around the outside edge. The washer-looking thing on top of the piston is a shim. This assembly goes inside the internal-tube of the damper, which in turn goes into the main tube. Got it?  View Related Article

 

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