29-20 Hydraulic Reservoir
A. Removal
1. Temporarily install a "DO NOT MOVE FLIGHT CONTROLS" sign in cockpit.
2. Remove tailcone cowling per § 53-23.
3. Place a one-liter container beneath suction tee fitting on reservoir. Remove cap from
tee fitting and allow reservoir fluid to drain into container. Reinstall cap and special
torque per § 20-33.
4. Remove suction and pressure lines, and disconnect and cap servo supply and return
hoses, from reservoir. Protect line and fitting openings.
5. Disconnect pump bypass solenoid and sight gage LED electrical connectors.
6. Remove three screws securing reservoir to gearbox and remove reservoir.
7. Note alignment of tee fittings and sight gage LED. Transfer LED and line and hose
fittings from removed reservoir to replacement reservoir.
B. Installation
1. Note alignment of tee fittings and sight gage LED on removed reservoir. Transfer LED
and line and hose fittings from removed reservoir to replacement reservoir. Special
torque fittings per § 20-33.
2. Install reservoir on gearbox and secure with three screws.
3. Install pressure and suction lines, repositioning tee fittings as required, and special
torque per § 20-33.
4. Connect servo supply and return hoses to reservoir. Position hose elbows to minimize
preload and special torque per § 20-33.
5. Connect pump bypass solenoid and sight gage LED electrical connectors and ty-rap
wires as required.
6. Fill reservoir with A257-15 hydraulic fluid and special torque filler vent per § 20-33.
7. Bleed hydraulic system per § 12-34.
8. Install tailcone cowling per § 53-23.
MAY 2015 Chapter 29 Hydraulics Page 29.5
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