Main Gear Assembly Instructions

Main Gear Assembly

• Adjust doors one at a time, ensuring no load is exerted on the cylinder, and retraction rods pass freely through their holes.
• Extend the landing gear, connect both doors, and retract the landing gear fully to ensure a 0.31-inch gap between the doors.
• Take up each retraction rod two additional turns to pre-load the doors.

Disassembly of Main Gear Oleo

• The main gear oleo assembly can be removed and disassembled from the gear oleo housing with the gear removed from or installed on the airplane.
• Place the airplane on jacks and a drip pan under the main gear to catch spillage.
• Remove air and fluid from the oleo strut by depressing the air valve core pin, removing the air charge valve, and siphoning out hydraulic fluid.
• Disconnect the brake hydraulic lines above the bracket on the main gear fork assembly.
• Remove the torque link assembly by removing the cotter pin, nut, washer, and bolt from the strut housing and fork assembly.

Removing Components

• Remove the piston tube components by pushing out the upper bearing retaining pins.
• Remove the upper bearing, spacer, lower bearing, "O" rings, and wiper strip from the tube.
• Remove the orifice tube by removing the bolt and washer from the top of the strut housing.
• Remove the orifice plate from the bottom of the orifice tube by releasing the snap ring.
• Remove the piston tube plug with "O" ring by removing the bolt assembly and inserting a rod up through the fork.

Inspection and Repair

• Inspect components for corrosion, scratches, nicks, and excess wear.
• Repair is limited to smoothing out minor scratches, nicks, and dents, and replacing parts.
• Service tolerance for wear of components can be found in Table VII-III.

Assembly of Main Gear Oleo

• Ensure parts are clean and inspected before assembly.
• Press the tube end into the fork body, aligning the bolt holes, and drill a pilot hole if necessary.
• Install the piston tube plug with "O" ring, lubricating the tube and plug with hydraulic fluid.
• Assemble the orifice tube by inserting the orifice plate and securing it with a snap ring.
• Install the tube into the strut housing, with the packing, washer, and bolt.
• Assemble the fork tube by installing the tube components in the correct order.