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).

Make sure that the support equipment is clean before you put it in the HRFM to prevent the contamination of the hydraulic fluid.

2. 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.

3. 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).

4. Close the filler cap on the HRFM.

5. 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).