Free Shipping on orders over $500.00
Part # MC800-001-6
This lock-o-seal assembly consists of a precision washer with an integrated elastomer O-ring for proper sealing and pressure control. Ideal when servicing brake master cylinders or replacing worn or hardened seals during maintenance.
Replaces part numbers:
800-001-6, 200AC6, 200AC-6
WARNING: Cancer and/or Reproductive Harm - California Proposition 65 Resources
Reference only: Please verify this product is appropriate for your use case before adding to your cart.
What does the Lock-O-Seal do in the brake master cylinder?
The Lock-O-Seal helps control hydraulic fluid flow inside the master cylinder, allowing fluid replenishment when the brakes are released and sealing the system when brake pressure is applied.
Does McFarlane have a PMA approved Lock-O-Seal?
Yes. McFarlane’s Lock-O-Seal (P/N MC800-001-6) is PMA approved for use on most single-engine Cessna aircraft. It is included in a popular brake master cylinder seal kit, P/N CBS-KT-1.
When should the Lock-O-Seal be replaced?
Replacement is recommended when brake pressure cannot be maintained, hydraulic fluid leakage is observed, or during other master cylinder maintenance.