2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 375Get this manual
4A-19 Brake Control System and Diagnosis: Assembly Assemble the master cylinder in the reverse order of disassemblyPay attention to the following points:! Install the O-ring (1)
CAUTION
Wash the master cylinder components with new brake fluid before reassembly Do not wipe the brake fluid off after washing the components When washing the components, use the specified brake fluidNever use different types of fluid or cleaning solvents such as gasoline, kerosine, etc Apply brake fluid to the master cylinder bore and all of the master cylinder component to be inserted into the bore Replace the O-ring and snap rings with new onesBF: Brake fluid (DOT 4)