SRAM RockShox Super Deluxe R Service Manual page 17

Install the backup ring by inserting one end into the air can, then push
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the remainder of the ring into the can, so that it rests on top of the
quad seal.
Orient the new wiper seal step side up. Install it into the wiper seal
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groove at the top of the air can.
Apply a thin layer of RockShox® Dynamic Seal Grease to the quad seal,
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backup ring, and wiper seal.
Set the air can aside.
Air Can Service 17