SRAM level ultimate Service Manual page 30

P i s t o n A s s e m b l y R e m o v a l
1 Use long-tipped internal snap ring pliers to compress the piston
assembly into the lever body as you remove the snap ring.
2 Remove the washer located beneath the snap ring.
3 Remove the piston assembly.
4 Spray isopropyl alcohol on and in the lever body, the lever blade, and
both of your gloves, then clean them with a shop towel.
Internal snap ring pliers 20 mm or 15 mm Thru Axle
Piston Assembly Removal 30