Draining fluid from the hydraulic system

Preliminary requirements

Required Conditions

Action/Condition
Reference

Remove the right transmission fairing (432BR).

Remove the upper-right mid-fuselage access panel (433BR).

Support equipment

Name
Identification/References
Quantity
Remark

Hand suction pump

Commercial

1

For oil

Consumables, materials and expendables

Name
Identification/References
Quantity
Remark

Hydraulic fluid

C-072

AR

As an alternative, use C-002

Procedure

  1. Open the filler cap from the Hydraulic Reservoir Filter Module (HRFM).

  1. To drain a small quantity of hydraulic fluid from the HRFM, do the steps that follow:

    1. Put the tube of the Hand suction pump (Commercial) in the opening of the HRFM.

    2. Drain the necessary quantity of hydraulic fluid from the HRFM into a small container.

  2. To fully drain the hydraulic fluid from the HRFM, do the steps that follow:

    1. Put a container below the hydraulic pump to collect the hydraulic fluid.

    2. Disconnect the suction hose from the union fitting.

    3. Fully drain the hydraulic fluid.

    4. Apply a light layer of Hydraulic fluid (C-072) to the threads of the union fitting.

    5. Connect the suction hose to the union fitting.

    6. Torque the coupling nut of the suction hose 210 to 420 inch-pounds (24 to 47 Nm).

  3. Close the filler cap on the HRFM.

  4. Tighten the filler cap.

Requirements after job completion

Required Conditions

Action/Condition
Reference

Install the upper-right mid-fuselage access panel (433BR).

Install the right transmission fairing (432BR).

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