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Features and Controls
Master Cylinder/Brake Fluid
Under normal operation, the diaphragm extends into the reservoir as fluid level drops. If the
fluid level is low and the diaphragm is not extended, a leak is likely and the diaphragm
should be replaced. Always fill the reservoir as needed whenever the cover is loosened or
removed to ensure proper diaphragm operation. Do not overfill.
An over-full master cylinder may cause brake drag or brake lock-up, which could result in serious
injury or death. Maintain brake fluid at the recommended level. Do not overfill.
Never store or use a partial bottle of brake fluid. Brake fluid is hygroscopic, meaning it rapidly
absorbs moisture from the air. The moisture causes the boiling temperature of the brake fluid to
drop, which can lead to early brake fade and the possibility of accident or severe injury. After
opening a bottle of brake fluid, always discard any unused portion.