# Filling the hydraulic system with fluid

## Preliminary requirements

### Required Conditions

| Action/Condition                               | Reference |
| ---------------------------------------------- | --------- |
| Park the helicopter on level ground.           |           |
| Remove the right transmission fairing (432BR). |           |
| Make an applicable log book entry.             |           |

### Consumables, materials and expendables

| Name            | Identification/References | Quantity | Remark                       |
| --------------- | ------------------------- | -------- | ---------------------------- |
| Hydraulic fluid | C-072                     | AR       | As an alternative, use C-002 |

## Procedure

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

{% hint style="warning" %}
Refer to the Flight Manual for the approved fluid (BHT-505-FM-1, Section 1). If you use a fluid that is not approved, damage to the components can occur.
{% endhint %}

2. Fill the HRFM with Hydraulic fluid (C-072) until the level of fluid on the sight gauge is immediately under the FULL line.
3. Install the filler cap on the HRFM.
4. Tighten the fluid filler cap.

## Requirements after job completion

### Required Conditions

| Action/Condition                                | Reference |
| ----------------------------------------------- | --------- |
| Install the right transmission fairing (432BR). |           |