Download Komatsu PC220-6 Hydraulic Excavator Complete Workshop Service Repair Manual –

Changing the transmission fluid in a Komatsu PC220-6 hydraulic excavator is an important maintenance task that helps ensure the machine operates smoothly and efficiently. Here’s a step-by-step guide to help you understand how to perform this procedure. Make sure you have all the necessary tools and safety equipment before you begin.

### Tools and Materials Needed:
1. **Safety Gear**: Gloves, safety glasses, and steel-toed boots.
2. **Tools**:
– Socket wrench set
– Screwdrivers (flat and Phillips)
– Pliers
– Oil filter wrench
– Drain pan or container for used fluid
– Funnel
– Torque wrench (if applicable)
3. **Materials**:
– New transmission fluid (check the operator’s manual for the correct type)
– New transmission filter (if applicable)
– Rags or paper towels
– Gasket or sealant (if required for the filter or pan)

### Steps to Change Transmission Fluid:

#### Step 1: Preparation
1. **Safety First**: Park the excavator on a flat, stable surface and engage the parking brake. Turn off the engine and allow it to cool down completely.
2. **Gather Tools and Materials**: Have all your tools and materials ready before starting the procedure.

#### Step 2: Locate the Transmission Fluid Drain Plug
1. **Find the Drain Plug**: Underneath the excavator, locate the transmission fluid drain plug. It is usually located at the bottom of the transmission casing.
2. **Clean Around the Plug**: Use a rag to clean any debris around the drain plug to prevent dirt from entering the transmission when you remove it.

#### Step 3: Drain the Old Fluid
1. **Position the Drain Pan**: Place the drain pan or container under the drain plug to catch the old fluid.
2. **Remove the Drain Plug**: Use the appropriate socket wrench to carefully remove the drain plug. Be cautious as the fluid may be warm, and it may start to drain quickly.
3. **Allow Fluid to Drain**: Let the old transmission fluid completely drain into the pan. This may take several minutes.

#### Step 4: Replace the Transmission Filter (if applicable)
1. **Locate the Filter**: If your excavator has a transmission filter, locate it. It is usually a cylindrical metal component.
2. **Remove the Old Filter**: Use an oil filter wrench to carefully unscrew the old filter. Be prepared for some fluid to spill out.
3. **Prepare the New Filter**: Before installing the new filter, apply a little new transmission fluid to the rubber gasket on the top of the new filter. This helps create a better seal.
4. **Install the New Filter**: Screw on the new filter By hand until it is snug, and then tighten it slightly more with the wrench (but do not overtighten).

#### Step 5: Reinstall the Drain Plug
1. **Replace the Drain Plug**: Once the old fluid is completely drained, clean the drain plug and inspect it for any damage. If necessary, replace with a new one.
2. **Tighten the Drain Plug**: Reinstall the drain plug and tighten it with the socket wrench. Be sure to follow any torque specifications provided in the operator’s manual.

#### Step 6: Fill with New Transmission Fluid
1. **Locate the Fill Cap**: Find the transmission fluid fill cap, which is usually located on the top of the transmission.
2. **Remove the Fill Cap**: Use your download Komatsu PC220 6 Hydraulic Excavator workshop manual hands or a tool to remove the fill cap.
3. **Add New Fluid**: Using a funnel, pour the new transmission fluid into the fill hole. Refer to the operator’s manual for the correct capacity of fluid to add.
4. **Check Fluid Level**: Once you’ve added the recommended amount of fluid, replace the fill cap.

#### Step 7: Start the Engine and Check for Leaks
1. **Start the Excavator**: Turn on the engine and allow it to idle for a few minutes. This will help the new fluid circulate.
2. **Check for Leaks**: While the engine is running, visually inspect the drain plug and filter for any leaks. If you notice any, turn off the engine and address the issue.

#### Step 8: Dispose of Old Fluid Properly
1. **Dispose of Used Fluid**: Take the used transmission fluid and filter to a recycling center or an appropriate disposal facility. Do not pour it down the drain or on the ground.

### Conclusion
You have now successfully changed the transmission fluid in your Komatsu PC220-6 hydraulic excavator! Regular maintenance like this can help prolong the life of your equipment and ensure it runs efficiently. Always refer to the operator’s manual for any specific instructions or specifications related to your model. If you are ever uncertain, don’t hesitate to consult a professional mechanic.
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