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PC30 Mini Excavator Sprocket Installation Guide

1. Pre-installation Preparation

1.1 Safety Precautions

• Park the excavator on a flat, firm surface, engage the parking brake, and turn off the engine to cut off all power sources.
• Use a jack or lifting device to securely support the excavator’s undercarriage on the side where the sprocket will be replaced, ensuring there is enough operating space under the machine and preventing it from tipping over during installation.
• Wear professional protective equipment, including safety gloves, goggles, and steel-toe boots, to avoid injury from falling parts or oil splashes.

2. Removal of the Old Sprocket

1. First, remove the excavator’s track chain (loosen the track tensioner to release tension in the track, then separate the track from the sprocket and guide wheel to create space for sprocket removal).
2. Locate the mounting bolts that secure the sprocket to the final drive (travel motor) flange. Use a socket wrench to remove the nuts and lock washers, and then take out the mounting bolts. Note the installation position and sequence of each bolt for reverse installation later.
3. Use a pry bar or rubber hammer to gently tap the sprocket to separate it from the final drive flange. If the sprocket is stuck due to rust or sediment, apply rust remover to the contact surface and wait for it to take effect before disassembly, avoiding violent impact that could damage the final drive.
4. Clean the final drive flange surface with a brush, removing rust, sediment, and old gasket residues to ensure a flat and clean contact surface for the new sprocket.