The Hawker 125 series business aircraft utilizes an axle-mounted Maxaret to control skid conditions. The Maxaret is installed in the axle and is driven by a small splined shaft in the hubcap. These units are required overhaul items and need to be removed at the necessary intervals. To avoid potential bill backs or high overhaul costs, it is recommended that the proper tooling and procedure for removal be followed.
Click images to enlarge
The Maxarets are held in place with a retaining nut in the axle. Dirt, debris and rust can also collect in this area creating a tight seal and snug fit. It is tempting to grab a hold of the shaft of the Maxaret with a pair of pliers to yank it free, but doing so will cause damage to the shaft of the Maxaret. The damage could result in the need to replace the shaft if the drive cap can not be installed due to damaged gear teeth. The cost to replace this part is estimated at about $2000.
To prevent unnecessary damage, loosen the nameplate bolts and use the special extraction tool engaged under the heads of the bolts. See photo 3. Using this procedure only takes a few extra minutes, but will prevent any damage to the shaft of the Maxaret, avoiding added expense. The Maxaret installation and extraction tool can be purchased from Hawker Beechcraft (part number A125529).
Duncan Aviation provides accessory unit repairs and overhauls for the most popular business aviation airframes. We work on tens of thousands of accessory units providing some of the fastest turntimes in the industry and the highest quality of repairs and overhauls.
Contributed by Jerry Cable, Accessory Tech Rep
Jerry Cable is an Accessories Tech Rep located at Duncan Aviation’s Lincoln, Nebr., facility. He is a landing gear and accessory components and systems specialist. His aviation career began in 1991.