How to Grease Boat Trailer Bearings?

Last Updated on October 1, 2022

Boat trailers come in all shapes and sizes, but they all have one thing in common, the need for proper lubrication. Knowing how to grease your trailer bearings is essential to keeping them in good condition, which can prevent expensive repairs or replacements down the road.

The first step to greasing a trailer boat is by detaching the trailer from the tow truck. Next, remove the wheel end cap and washer. Then, use a grease gun to inject grease into each of the bearing races until it starts to leak out of the other side. 

To know the rest of the process, you can follow this article. Let’s get started!

How to grease wheel bearings on a boat trailer?

  • Park your boat on a level surface and chock the wheels.
  • Remove the hubcap or dust cover from the trailer wheel to access the bearings.
  • Use a crescent wrench to loosen the nut that secures the inner bearing race in place.
  • Pull the inner bearing race out of the hub, being careful not to damage the races or lose any of the small balls inside.
  • Apply a generous amount of grease to both sides of each bearing, as well as around all of the balls inside them.
  • Slide the bearings back into place in the hub, and then replace and tighten the retaining nut with your crescent wrench.
  • 7 Repeat this process for each wheel on your trailer.

How Often to Grease Boat Trailer Bearings?

Boat trailer bearings are an important part of towing your vessel. They allow the wheel to rotate smoothly and prevent damage to the trailer axles. While most boat trailers come with grease-able bearings, it is important to know how often to grease them.

The rule of thumb is to grease boat trailer bearings every time you use the trailer. This ensures that they are properly lubricated and will not fail while you are on the road. 

However, some people choose to grease their bearings every few months, even if they don’t use their trailer often. If you notice that your boat trailer bearing is making noise or seems loose, be sure to check them and add more grease as needed. 

It is also a good idea to check the condition of your bearings before each trip in case they need to be replaced.

How to Grease EZ Lube Trailer Bearings?

If you have an EZ Lube trailer, chances are you will need to grease the bearings at some point. 

Here is a step-by-step guide on how to do just that: 

Step 1: Park your trailer on level ground and jack it up so that the wheels are off the ground. Place jack stands under the frame to support it. 

Step 2: Remove the hub cap or dust cover from the wheel hub. You should see a large nut in the center of the hub.

Step 3: Use a wrench to loosen, but not remove, this nut. For most trailers, you will need a 1-1/8″ or 1-¼” wrench for this task. 

Step 4: While continuing to hold onto the nut with one hand, use your other hand to spin the tire until you see grease coming out of the hole in the center of the hub where the axle passes through.

The grease should be coming out of all three holes in a steady stream. If it isn’t, keep spinning until it does. 

Step 5: Once you see good streams of grease coming out of all three holes, stop spinning and put everything back together (reinstall dust cover/hub cap). 

How to Grease Trailer Bearings With Bearing Buddies?

If you have a trailer with bearings, then you need to know how to properly grease them. Otherwise, your bearings will eventually fail and your trailer will become unusable. 

Here’s a step-by-step guide on how to grease your trailer bearings using bearing buddies:

Step 1: Park your trailer on level ground and set the parking brake. Then, jack up the axle so that the wheels are off the ground.

Step 2: Remove the hubcaps or wheel covers from the wheels.

Step 3: Use a wrench to loosen the nut that secures the inner bearing race to the spindle. Then, pull off the inner bearing race along with any washers or seals that may be present. Repeat this process for the outer bearing race.

Step 4: Inspect the bearings and races for any damage or wear. If they appear damaged, replace them with new ones before proceeding further. 

Otherwise, clean all of the old greases from both sets of bearings and races using a rag or paper towel dipped in solvent (kerosene works well). Allow everything to dry completely before moving on to Step 5.

Step 5: Using fresh wheel bearing grease, fill each cup (the recessed area where each ball sits) until it is heaping full; then pack additional fresh grease around each ball until it is well coated but not dripping . 

Next , re-install each inner & outer bearing race making sure they are seated flush against their respective cups; hand tighten each retaining nut just enough so that each race cannot be pulled out again by hand. DO NOT OVER-TIGHTEN!

Finally, reinstall each hubcap or wheel cover making sure not to pinch any wiring in between; now give ‘er a whirl!

How to Grease Bearing Buddies?

If you’ve ever worked on a car, you know that there are a lot of different moving parts that need to be lubricated in order to keep the car running smoothly. Bearing buddies are one type of grease fitting that is commonly used on boats.

When using bearing buddies, it’s important to first clean the area around the buddy before attaching it. This will help ensure that there is no dirt or debris caught in the seal which could cause problems later on. 

Once the area is clean, simply attach the bearing buddy and tighten it down. Next, you’ll need to fill the buddy with grease. It’s important to use high-quality marine-grade grease so that it can withstand the harsh conditions found in saltwater environments. 

Once you’ve filled the buddy, simply remove any excess grease so that it doesn’t run out when you start boating again. That’s all there is to it! By following these simple steps, you can ensure that your boat’s bearings stay well protected and lubricated while out on the water.

How to Grease Trailer Bearings?

If you’re like most RVers, you probably don’t give your trailer bearings a second thought. Until they start making that awful grinding noise. Then, it’s time to take action! Fortunately, greasing trailer bearings is a pretty simple task that can be done in just a few minutes.

Here’s what you need to know: 

1. The first step is to remove the hub cap or dust cover. You’ll see a large nut in the center of the hub. This is called the “castle nut.” 

2. Use a wrench to loosen (but not remove) the castle nut. 

3. Next, use a grease gun to pump fresh grease into the zerk fitting (the grease fitting will be located on the backside of the hub). 

Pump in enough grease until you see it coming out around the edges of the hub. At this point, stop pumping and re-tighten the castle nut. 

4. Finally, replace the hub cap or dust cover.

That’s it! You’re done!

How to Grease Trailer Bearings Without Bearing Buddies?

If you have a trailer that uses bearing buddies, then you know how important it is to keep the bearings properly greased. But what do you do if you don’t have bearing buddies? How can you grease your trailer bearings without making a mess or getting too much grease on the tires?

Here’s a step-by-step guide to greasing your trailer bearings without bearing buddies: 

Step 1: Park your trailer on level ground and set the parking brake. Remove the wheels and set them aside.

Step 2: Use a clean rag to wipe away any dirt or grime from the spindle and hub assembly. This will help ensure that the new grease is evenly distributed. 

Step 3: Place a small amount of high-quality grease onto your finger and apply it to the inner race of the bearing. Rotate your finger around the inner race to work the grease into all of the nooks and crannies. Repeat this process with the outer race of the bearing. 

Step 4: Once both races are fully coated with grease, re-install the wheel onto the spindle and hand-tighten the lug nuts until their snug (don’t over-tighten!). Lower the trailer back down and head out on your next adventure!

How to Grease Boat Trailer Bearings?

How Often Should You Grease the Bearings on a Boat Trailer?

Assuming you are talking about the bearings that keep your wheels turning as you tow your boat trailer, the answer is: that it depends. These bearings need to be greased in order to keep them working properly and prevent wear and tear. 

However, how often you need to grease them can vary depending on a number of factors, such as how often you use your trailer, what kind of terrain you’re driving on, etc.

If you use your boat trailer regularly (several times a month), then you should aim to grease the bearings every few weeks or so. If you don’t use it as often, then once a month should suffice. 

In general, it’s better to err on the side of caution when it comes to greasing boat trailer bearings. It’s a relatively simple and quick task that can save you a lot of money down the line by preventing damage to your bearings.

Should You Use Marine Grease on Boat Trailer Bearings?

There are a lot of different types of grease on the market and it can be hard to know which one to use for your boat trailer bearings. Marine grease is specifically designed for use in salt water and will protect your bearings from corrosion.

Can You Over Grease Trailer Bearings?

If you are talking about the bearings in your trailer wheels, then yes, you can over-grease them. This can happen if you use too much grease or if you don’t clean out the old grease before adding new grease. Over greasing can cause the bearings to overheat and fail.

How many greases Do You Put in a Boat Trailer Hub?

If you’re wondering how much grease to put in a boat trailer hub, the answer is fairly simple. You’ll need to use enough grease to fill the void space inside the hub, but not so much that it starts to squirt out of the seals. 

A good rule of thumb is to use about as much grease as will fit in a standard coffee mug. Before adding any grease to the hub, be sure to clean off any old grease or debris that may be present. 

Once you’ve added the fresh grease, spin the wheel by hand a few times to help distribute it evenly. You should then be all set!


So, if you want to grease your boat trailer bearings this summer, remember the following tips. Make sure you have all of the necessary supplies on hand before you get started. 

Use quality bearing grease that will protect your bearings from moisture and corrosion. Apply the grease in a thin layer using a brush or applicator pad. 

Finally, be sure to wipe away any excess grease with a clean cloth. Following these simple steps should help keep your boat trailer bearings running smoothly all season long!