Repairing the starter motor on a Komatsu GD 670A 2C Motor Grader may seem challenging if you have little mechanical experience, but I’ll break it down into simple steps. click here for more details on the download manual…..
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Please remember to follow safety precautions and consult the operator’s manual for specific details related to your machine.
### Tools and Materials You Might Need:
– Wrenches and sockets (typically 10mm, 12mm, and 14mm)
– Screwdrivers (flat-head and Phillips)
– Multimeter (for testing electrical connections)
– Cleaning cloths
– Replacement parts (if needed)
– Safety gloves and goggles
### Safety First:
1. **Turn Off the Engine:** Ensure the motor grader is completely off and has cooled down.
2. **Disconnect the Battery:** Always disconnect the negative terminal first to avoid any electrical shorts.
### Steps to Repair the Starter Motor:
#### Step 1: Locate the Starter Motor
– The starter motor is usually located near the engine on the side of the motor grader. It’s a cylindrical component connected to the engine with several wires.
#### Step 2: Remove the Starter Motor
1. **Disconnect Wires:** Carefully disconnect the wires connected to the starter motor. Note their positions for reassembly (you can take a photo).
2. **Unbolt the Starter:** Use the appropriate socket to remove the bolts that hold the starter motor in place. Keep these bolts in a safe place as you will need them later.
#### Step 3: Inspect the Starter Motor
– Once removed, inspect the starter motor for any visible damage like cracks, corrosion, or burnt areas. If it looks damaged, it may need to be replaced rather than repaired.
#### Step 4: Clean the Components
– Use a cleaning cloth to wipe off any dirt or grime from the starter motor and the area around it. this will help ensure a good connection when you reinstall it.
#### Step 5: Test the Starter Motor
1. **Using a Multimeter:** Set the multimeter to the appropriate DC voltage setting. Connect the positive probe to the positive terminal of the starter and the negative probe to the negative terminal.
2. **Check for Voltage:** If there’s no voltage or it’s below the required level, the starter motor may be faulty and need replacing.
#### Step 6: Repair or Replace
– **If Repairing:** If the issue is minor (like a loose connection), tighten it. If you find damaged brushes or other components, you can replace those parts If you have the right tools and parts.
– **If Replacing:** If the starter motor is faulty, install a new one. Make sure it matches the specifications of the old starter.
#### Step 7: Reinstall the Starter Motor
1. **Position the Starter Motor:** Align it back in its place on the engine.
2. **Bolt it Back:** Reattach the bolts you removed earlier to secure the starter motor.
3. **Reconnect Wires:** Reconnect the wires to the starter motor in the same configuration as before.
#### Step 8: Reconnect the Battery
– Reattach the negative terminal of the battery first, followed by the positive terminal.
#### Step 9: Test the Starter Motor
– Start the motor grader to verify that the starter motor is working properly. Listen for any unusual sounds,
and check for a smooth start.
### Conclusion:
If the motor grader starts without any issues, congratulations! You’ve successfully repaired the starter motor. If you encounter problems, it might be best to consult a professional mechanic or the service manual for more detailed troubleshooting steps.
### Note:
Always remember to work carefully and methodically. If you feel uncertain at any step, don’t hesitate to ask for help or consult a professional.
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