How to Change the Three Oil Compartments on the Harley

Changing the oil compartments on your Harley is an essential part of routine maintenance to optimize its performance and longevity. To ensure your motorcycle runs smoothly, it is crucial to maintain clean and properly lubricated oil in the engine, transmission, and primary housing. This step-by-step guide will walk you through the process of changing the three oil compartments on your Harley motorcycle.

Key Takeaways:

  • Regularly changing the oil in your Harley’s three compartments is vital for optimal performance.
  • Warm up the motorcycle before starting the oil change process.
  • Drain and replace the engine oil, ensuring to replace the drain plug’s O-ring.
  • Change the oil filter and fill it with 20W50 motorcycle oil.
  • Drain and refill the transmission compartment with Harley-Davidson transmission fluid.
  • Drain and refill the primary housing compartment with Harley-Davidson primary fluid.
  • Double-check all changes made, including tightening drain plugs and maintaining proper fluid levels.

Understanding the Three Oil Compartments on a Harley

Before diving into the process of changing the three oil compartments, it’s important to understand their individual functions and roles in the Harley’s overall performance. A Harley motorcycle relies on three essential oil compartments to keep its engine running smoothly and efficiently. These compartments are the engine oil, transmission, and primary housing.

The engine oil compartment is responsible for lubricating the engine’s moving parts, reducing friction, and preventing excessive wear and tear. It plays a crucial role in maintaining optimal engine performance and prolonging the life of the engine. The transmission compartment, on the other hand, ensures smooth gear shifting and transfers power from the engine to the wheels. It is essential for a seamless riding experience and overall bike performance. Lastly, the primary housing compartment houses the primary chain and clutch, requiring its own dedicated oil to function properly and prevent any potential damage.

Understanding the functions of these three oil compartments is vital for maintaining the Harley’s performance and longevity. Regular inspection and maintenance of these compartments, including oil changes, are essential to ensure their proper functioning. In the next sections, we will guide you through the step-by-step process of changing the oil in each compartment, providing you with all the necessary instructions and tips for a successful oil change on your Harley.

Oil CompartmentFunction
Engine OilLubricates engine parts, reduces friction, and prevents wear and tear.
TransmissionEnsures smooth gear shifting and transfers power from the engine to the wheels.
Primary HousingProvides lubrication for the primary chain and clutch.

Now that you have a basic understanding of the three oil compartments in a Harley motorcycle, you are ready to proceed with the step-by-step guide on changing the oil in each compartment. By following the instructions carefully, you will be able to maintain the optimal performance of your Harley and prolong its lifespan.

Draining the Engine Oil Compartment

The first step in changing the three oil compartments on your Harley is to properly drain the engine oil compartment. To do this, start by warming up your motorcycle to operating temperature to ensure that the oil flows smoothly.

Once the engine is warm, locate the engine oil drain plug. Using the appropriate tools, carefully unscrew the drain plug and allow the oil to drain into an oil pan placed below to catch the used oil.

While the oil is draining, it is a good idea to inspect the drain plug’s O-ring for any signs of damage or wear. Replace it if necessary to prevent any potential oil leaks once the new oil is added.

After the oil has completely drained, securely tighten the drain plug back into place. Be careful not to overtighten it, as this can lead to stripped threads or damage to the oil pan.

StepAction
1Warm up the motorcycle to operating temperature.
2Locate the engine oil drain plug and unscrew it.
3Allow the oil to drain into an oil pan.
4Inspect the drain plug’s O-ring and replace if needed.
5Tighten the drain plug securely.

Changing the Engine Oil Filter

Once the engine oil compartment has been drained, it’s time to focus on changing the engine oil filter to ensure proper filtration. The oil filter plays a crucial role in keeping the engine clean and free from contaminants. Follow these step-by-step instructions to successfully replace the engine oil filter on your Harley motorcycle:

  1. Begin by locating the oil filter, which is typically located on the underside of the engine. Use a wrench or a filter wrench to loosen the old filter in a counterclockwise direction. Be cautious of any residual oil that may drain out.
  2. Once the old filter is loose, carefully remove it from the engine. Take note of the orientation of the filter as you remove it to ensure proper installation of the new filter.
  3. Before installing the new filter, drain any oil trapped in the filter housing. This can be done by simply allowing the filter housing to drain for a few minutes or by gently tapping it on a solid surface.
  4. Next, take a new oil filter and fill it with 20W50 motorcycle oil. This helps to eliminate any dry starts and ensures a smooth flow of oil when the engine is started.
  5. Once the new filter is filled, apply a thin coat of clean oil to the rubber gasket on the filter. This helps to create a proper seal and prevents leaks.
  6. Screw the new filter onto the engine in a clockwise direction. Use your hand to tighten it as much as possible, and then give it a final quarter turn with a filter wrench to ensure it is securely tightened.

By following these steps, you can successfully change the engine oil filter on your Harley motorcycle. Remember to always dispose of the old filter and drained oil responsibly. Consult your motorcycle’s owner manual for specific torque specifications and any additional instructions provided by the manufacturer.

Table: Recommended Torque Specifications

ComponentTorque Specification
Engine Oil Drain Plug14-21 ft-lbs
Oil FilterTighten by hand, then an additional 1/4 turn

Following the proper torque specifications ensures that all components are tightened to the correct level, preventing leaks and ensuring a secure fit. Always refer to your motorcycle’s specific torque specifications for accurate information.

Draining and Refilling the Transmission Compartment

The transmission compartment plays a crucial role in transferring power to the wheels, making it essential to drain and refill the oil regularly. Follow these steps to ensure a smooth process:

  1. First, warm up your Harley to its operating temperature. This will allow the oil to flow more easily during the draining process.
  2. Locate the drain plug on the bottom of the transmission housing. Using a suitable wrench, carefully unscrew the plug to allow the old oil to drain into an oil pan.
  3. While the oil is draining, take the opportunity to inspect the drain plug’s O-ring. If it shows signs of wear or damage, replace it with a new one to prevent any potential leaks.
  4. Once the oil has fully drained, securely tighten the drain plug back into place. Ensure it is properly sealed to avoid any oil leaks.
  5. Now it’s time to fill the transmission with fresh oil. Use Harley-Davidson transmission fluid specifically designed for your motorcycle’s model. Refer to the manufacturer’s recommendations for the correct amount of fluid required.
  6. Carefully pour the transmission fluid into the filler hole located on the side of the transmission housing. Take your time to prevent any spills or overfilling.
  7. After filling, securely tighten the filler hole cap to ensure no oil leakage.

By following these steps, you can effectively drain and refill the transmission compartment on your Harley. Regular maintenance of all oil compartments will help keep your motorcycle running smoothly and efficiently.

Materials Needed:Tools Needed:
– Harley-Davidson transmission fluid– Suitable wrench
– Oil pan– Oil filter wrench (if necessary)
– New drain plug O-ring

Draining and Refilling the Primary Housing Compartment

The primary housing compartment, which houses the primary chain and clutch, requires periodic fluid changes to ensure smooth operation. To begin the process, warm up your Harley motorcycle to operating temperature. This will help the fluid flow more easily and ensure a thorough drain.

Locate the drain plug on the bottom of the primary housing. Carefully unscrew the plug using a suitable socket or wrench, making sure to place an oil pan underneath to catch the old fluid. Allow the fluid to drain completely before moving on to the next step.

While the primary housing is draining, inspect the drain plug’s O-ring for any signs of damage or wear. Replace the O-ring if necessary, as this will ensure a proper seal when refilling the compartment. Once the O-ring is in place, tightly screw the drain plug back into the primary housing.

Now it’s time to refill the primary housing with fresh fluid. Using a funnel, carefully pour Harley-Davidson primary fluid into the fill hole located on the outer cover of the primary housing. Be sure to refer to your motorcycle’s manual for the correct amount of fluid needed. Once filled, securely tighten the fill hole plug to prevent any leaks.

StepAction
1Warm up the motorcycle to operating temperature.
2Unscrew the drain plug on the bottom of the primary housing and allow the old fluid to drain completely.
3Inspect the drain plug’s O-ring and replace if necessary.
4Tightly screw the drain plug back into the primary housing.
5Using a funnel, carefully pour Harley-Davidson primary fluid into the fill hole located on the outer cover of the primary housing.
6Tighten the fill hole plug securely.

Finalizing the Oil Compartment Changes

Once you have completed the steps for all three oil compartments on your Harley motorcycle, it’s crucial to finalize the changes by verifying everything is secure and up to the recommended levels. Double-checking your work ensures that your bike will run smoothly and efficiently, giving you peace of mind on your next ride.

Start by tightening all the drain plugs properly. It’s important to ensure that they are securely in place to prevent any oil leaks. Use the appropriate tools and tighten them just enough to create a seal, but be careful not to overtighten and damage the threads.

Next, check the fluid levels in each compartment. The engine oil, transmission fluid, and primary fluid should all be at the recommended levels. Use the dipsticks or sight glasses provided on your Harley to accurately measure the fluid levels. Top up if necessary, but be careful not to overfill.

Lastly, take a moment to inspect the drain plug O-rings you replaced. Ensure they are properly seated and in good condition. If you notice any signs of wear or damage, it’s best to replace them again to avoid any potential leaks. Remember, proper sealing is essential for maintaining the integrity of your oil compartments.

By following these simple steps to finalize the changes made to your Harley’s oil compartments, you can enjoy a worry-free ride knowing that your motorcycle is properly maintained and ready for the road ahead.

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