Plug / Connector for Brush Motor Unit Lely

Plug - Connector for Brush Motor Unit (Lely)

The Brush Motor Connector is a heavy-duty, moisture-resistant electrical plug designed specifically for the teat cleaning brush motors on Lely Astronaut milking robots. Given that the brush unit operates in the most demanding part of the robot—exposed to constant water spray, manure, and cleaning chemicals—this connector is built to maintain a high-integrity electrical signal to ensure consistent motor torque and speed.

Product Specifications

Key Features

• IP67 Waterproof Rating: Specifically designed to prevent water ingress, which is the most common cause of brush motor failure or "short circuit" errors in the robot software.
• Vibration Resistant: Features a secure locking mechanism (a threaded connection) that prevents the plug from vibrating loose during the high-RPM operation of the brushes.
• Corrosion-Resistant Contacts: The internal pins/sockets are plated to resist the "green" oxidation that occurs in the acidic/alkaline environment of a dairy barn.
• Strain Relief: Built-in cable protection prevents the internal wires from fraying or snapping at the entry point of the plug due to the movement of the robot arm.

Maintenance & Troubleshooting

The brush motor connector is a frequent point of failure if not properly maintained. If your robot is reporting "Brush Motor Overload" or "Brush Not Rotating," check the following:

1. Moisture Ingress: Disconnect the plug and check for dampness inside. If found, dry it thoroughly and apply a small amount of dielectric silicone grease to the seals.
2. Pin Corrosion: Look for black or green deposits on the metal contacts. If the pins are pitted, the connector (9.1186.0564.0) should be replaced to prevent heat buildup.
3. Cable Tension: Ensure the cable leading into the plug has enough slack. If it is too tight, it will eventually pull the wires out of the terminals inside the plug.

Pro Tip

When replacing this connector, always ensure the sealing gasket is present and seated correctly. A missing gasket will lead to motor failure within weeks due to the high-pressure water used during the robot's self-cleaning cycles.