### Control Arm Replacement on a Massey Ferguson MF20 Baler

#### Tools Needed:
1. **Wrench Set** (metric and imperial)
2. **Socket Set** (with extensions)
3. **Torque Wrench**
4. **Pry Bar**
5. **Jack and Jack Stands**
6. **Hammer**
7. **Bearing Puller/Slide Hammer** (if necessary)
8. **Safety Glasses**
9. **Gloves**
10. **Shop Towels**
11. **Lubricant/Cleaning Spray** (e.g., WD-40)

#### Safety Precautions:
1. **Wear Safety Gear**: Always wear safety glasses and gloves to protect your eyes and hands.
2. **Work on Level Ground**: Ensure the vehicle is on a flat surface to prevent rolling.
3. **Use Jack Stands**: Never rely solely on a jack; use jack stands to support the vehicle securely.
4. **Disconnect Battery**: If any electrical components are involved, disconnect the battery to avoid shorts.

#### Replacement Steps:

1. **Preparation**:
- Park the MF20 on a flat surface.
- Engage the parking brake and chock the wheels.

2. **Lift the Vehicle**:
- Use a jack to lift the front of the MF20.
- Place jack stands under the frame for safety.

3. **Remove the Wheel**:
- Use a wrench or socket to remove the lug nuts.
- Take off the wheel and set it aside.

4. **Access the Control Arm**:
- Locate the control arm connected to the chassis and the wheel hub.
- If necessary, remove any components obstructing access (e.g., brake calipers, sway bar links).

5. **Remove the Control Arm**:
- Identify the bolts securing the control arm to the chassis and the wheel hub.
- Use the appropriate socket to remove these bolts. If they are rusted, apply lubricant and let it sit before attempting removal.

6. **Inspect and Remove**:
- If the control arm has bushings or ball joints that are worn, you may need a bearing puller or slide hammer to remove them.
- Take note of the orientation of the control arm for correct installation of the new part.

7. **Install the New Control Arm**:
- Position the new control arm in place.
- Insert and hand-tighten the bolts that connect it to the chassis and wheel hub.

8. **Torque Specifications**:
- Use a torque wrench to tighten the bolts to the manufacturer’s specifications (refer to the service manual for exact values).

9. **Reassemble Other Components**:
- Reattach any components that were removed for access (brake calipers, sway bar links).
- Ensure all connections are secure.

10. **Reinstall the Wheel**:
- Place the wheel back on the hub and hand-tighten the lug nuts.
- Lower the vehicle off the jack stands.

11. **Final Torque**:
- With the vehicle on the ground, use the torque wrench to fully tighten the lug nuts to the manufacturer’s specifications.

12. **Reconnect Battery** (if disconnected).

#### Common Pitfalls to Avoid:
- **Not Using Jack Stands**: Always use jack stands when working under the vehicle.
- **Forgetting to Torque Bolts**: Not torquing bolts to specifications can lead to failures.
- **Ignoring Wear on Other Components**: Inspect bushings and joints for wear; replace if necessary.
- **Misalignment of New Control Arm**: Ensure the new part is aligned correctly before tightening.

#### Replacement Parts:
- Always use OEM or high-quality aftermarket parts for reliability.
- Replace any worn bushings or ball joints associated with the control arm during the process.

By following these steps carefully, you can successfully replace the control arm on a Massey Ferguson MF20 baler while minimizing risks and ensuring a proper installation.
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