Reference

Marsh Brothers

• Does the BMC kit come with the piston?

  No, BMC kits do not caintain the piston. However, it comes with the hardware needed to complete the job and installaiton tooling.

• How do I know if the BMC kit will fit my aircraft?

  It is critical the owner or maintenance shop obtain a PN off the brake master cylinder assembly, not from the IPC manual. 

• How do Marsh Brothers' kits differ from the OEM parts they replace?

  The kits fit exactly the same space that the OEM parts do. However, the most important difference is that the parts in the kits cannot corrode or seize together because of the self lubricating polymer bushings used to replace the steel bushings. If the steel OEM parts corrode and seize, the result is costly repairs to the supporting structure in the wing. 

• How easy are the kits to install?

  It's just a matter of removing the doors, pressing out the steel bushings and then pressing in the replacement parts. The kits include all necessary hardware including new bolts and spacers. Where the OEM sleeve part is flanged, the space is made up with a thin washer. Installation videos are available to demonstrate kit installation. 

• What are the benefits associated with Marsh Brothers' product?

  Longer life-time, grease-free operation, does not support corrosion, decrease in weight, self lubricates. 

• What if I lubricate the polymer bushings?

  You don't need to, but it's not a problem if someone doesn't know the bushings have been fitted and decides to put lubrication into the hinges. The bushings will function properly in oil or grease, but it is not necessary. 

• What is the benefit of the spinner washers?

  Typical spinner washers are made from thin nylon and require frequent replacement. Nylon washers fail under the pressure exerted by the screw's head. MBA spinner washer solves this problem by conforming the the curvature of the spinner, and its extra thickness has a vibration dampening effect. 

• What is the polymer used in the kits?

  Marsh Brothers developed a new poylmer formula specifically for aerospace which they call AeroTough™ GF, for "grease free". Lubricant is bult into the polymer, completely eliminating any need for periodic lubrication. 

• Which fuel cap washer will fit my fuel cap?

  We have three types of fuel cap washers. In order to know the correct washer, the fuel cap part number must be known. It can usually be found at the bottom of the fuel cap assembly.

• Will one Landing Gear Door Hinge Kit do the entire aircraft (both RH/LH main gears)?

  Yes, one kit will do both the left and right main landing gear doors.