Marsh Brothers’ Brake Master Cylinder upgrade & repair kit is a proactive solution that will eliminate the risk of failure due to leaks at the piston rod seal. By eliminating typical O-ring failure modes, this upgrade kit will increase mean time between unscheduled maintenance events keeping your aircraft in the air longer, while reducing maintenance costs associated with your brake master cylinder. Like all Marsh Brothers products, our glands and seals are developed to last for the long haul.
Installation of the Marsh Brothers brake master piston rod seal offers the opportunity to practice preventative maintenance, by eliminating the risks associated with the typical failure modes of traditional O-rings used in dynamic seal applications.
The Marsh Brothers Aviation King Air brake master cylinder upgrade kit contains all of the hardware to repair/upgrade your King Air brake master cylinder. Additionally, the kit also includes tooling to aid in the re-assembly. The piston rod seal (AeroLas™-Flex) provided is a Marsh Brothers Aviation proprietary lip seal design and is manufactured from a proprietary elastomeric polymer. The Marsh Brothers Aviation Thorseal® replaces both the OEM O-ring and rod wiper. The kit also includes installation instructions, instructions for continuing airworthiness and an authorized release certificate.
Note: The Piston is not included in this kit.
Caution: Thorseal® is made from Marsh Brothers proprietary material known as AeroLas™-Flex. AeroLas™-Flex is not compatible with phosphate ester hydraulic fluid, commercially known as Skydrol. Exposure to phosphate ester hydraulic fluid contamination will damage the seals.
Note 1: The Piston is not included in this kit.
Note 2: Kit Includes:
Installation Aids, Seal Compression Ring, Thread Sleeve, and Push Tube.
|MBA Part #
|OEM Cross Reference Part #
|NUT ROD END JAM
|INTERNAL RETAINING RING
|PISTON ROD GLAND SEAL
|A57G401 / AN6227B6
|O-RING (STATIC GLAND)
|O-RING (PISTON HEAD)
|BACK-UP RING (PISTON HEAD)
|EXTERNAL RETAINING RING
|O-Ring (Piston Rod)
|Back-up Ring (Piston Rod)