SRAM code rsc 2018 Service Manual page 21

5 Use a SRAM® Lever Internals Assembly Tool to unthread the piston
sleeve and coupler. Insert the SRAM Lever Internals Assembly Tool
into the lever body and align the key slot of the tool with the piston
coupler. Use the tool to unthread the sleeve and remove the sleeve
and coupler.
If the piston sleeve and coupler are stuck in the lever body, use needle
nose pliers to gently remove.
6 Remove the sleeve from the coupler.
Clean the sleeve and coupler.
7 Place a rag over the lever body to prevent the piston assembly from
ejecting.
Push out the contact adjust knob.
⚠ CAUTIO N - E YE HAZA RD
Use safety glasses.
The piston assembly is spring loaded and will forcefully eject from the
lever body when the contact knob is removed.
8 Remove the piston assembly from the lever body.
Clean the lever body.
SRAM Lever Internals Assembly Tool
Piston Assembly Removal 21