Hey there! As a supplier of manual oil pumps, I often get asked about how to replace the pump body of a manual oil pump. It's actually not as complicated as it might seem, but it does require some basic knowledge and the right tools. In this blog post, I'll walk you through the step-by-step process of replacing the pump body of a manual oil pump.
Step 1: Gather Your Tools and Materials
Before you start the replacement process, you'll need to gather all the necessary tools and materials. Here's a list of what you'll typically need:
- A set of wrenches (including adjustable wrenches)
- A socket set
- A screwdriver set (both flathead and Phillips)
- A drain pan
- A new pump body (make sure it's the correct model for your manual oil pump)
- Gasket sealant
- Safety glasses and gloves
Step 2: Prepare the Work Area
It's important to work in a clean and well-lit area. Place the drain pan under the manual oil pump to catch any oil that might spill during the process. Put on your safety glasses and gloves to protect yourself from any potential hazards.
Step 3: Drain the Oil
First, you need to drain the oil from the manual oil pump. Locate the oil drain plug, which is usually at the bottom of the pump. Use a wrench to loosen the plug and let the oil drain into the pan. Make sure to drain all the oil completely. This might take a few minutes, so be patient.
Step 4: Remove the Old Pump Body
Once the oil is drained, you can start removing the old pump body. First, disconnect any hoses or pipes that are connected to the pump body. Use a wrench or socket to loosen the bolts that hold the pump body in place. Carefully remove the bolts and set them aside in a safe place. Then, gently lift the old pump body off the pump base. You might need to wiggle it a bit to break the seal.
Step 5: Clean the Pump Base
After removing the old pump body, take a clean cloth and wipe the pump base to remove any oil, dirt, or debris. Make sure the surface is completely clean and dry. This is important because a clean surface will ensure a good seal when you install the new pump body.


Step 6: Install the New Pump Body
Now it's time to install the new pump body. Apply a thin layer of gasket sealant to the mating surface of the pump base. Carefully place the new pump body on the pump base, aligning the bolt holes. Insert the bolts and hand-tighten them first to make sure they're properly seated. Then, use a wrench or socket to tighten the bolts to the manufacturer's recommended torque specification. Don't over-tighten the bolts, as this can damage the pump body or the pump base.
Step 7: Reconnect the Hoses and Pipes
Once the new pump body is installed, reconnect all the hoses and pipes that you disconnected earlier. Make sure they're properly connected and tightened. You might need to use a wrench to secure the connections.
Step 8: Refill the Oil
Now that the new pump body is installed and all the connections are made, it's time to refill the oil. Use a funnel to pour the appropriate amount and type of oil into the manual oil pump. Check the oil level using the dipstick and make sure it's at the correct level.
Step 9: Test the Pump
After refilling the oil, it's time to test the pump. Turn on the manual oil pump and check for any leaks. Listen for any unusual noises or vibrations. If everything seems to be working fine, you're good to go!
Some Additional Tips
- When working with manual oil pumps, it's important to follow the manufacturer's instructions. Different models might have slightly different installation procedures.
- If you're not sure about any step of the process, don't hesitate to consult a professional or contact us for assistance.
- You might also want to consider using some high-quality parts for your manual oil pump. For example, the Linear Block can provide smooth and stable movement, the Organ Guide Rail Dust Cover can protect your pump from dust and debris, and the Sk Vertical Shaft Support can ensure the stability of the vertical shaft.
Conclusion
Replacing the pump body of a manual oil pump is a task that you can do yourself with the right tools and knowledge. By following these steps, you can save time and money by doing the replacement at home. If you have any questions or need more information about manual oil pumps or replacement parts, feel free to contact us. We're always here to help you with your procurement needs. Whether you're a small business or a large industrial company, we can provide you with high-quality manual oil pumps and related parts. So, don't hesitate to reach out and start a conversation about your requirements.
References
- Manual Oil Pump Manufacturer's Manual
- General Automotive Repair Guides






