This is part number 1980A-SS from Trailer Buddy. This is a great trailer bearing protector to use in salt water or freshwater as it is stainless steel and therefore will not rust. This bearing buddy measures 1.980 at its base, which is the portion of this product that will mount into your trailer hub. The exact location you will mount your Trailer Buddy would be the Outer Face of the Hub, covering the tip of the spindle.
The Trailer Bearing Protector is designed to be used in most 4 Lug or 5 Lug hubs that would otherwise use a grease cap or dust cap of a 1.98 diameter. The blue indicator ring will protrude slightly to let you know when it's full, or recede when you need to add extra grease. Bearing buddies put a small amount internal pressure in the hub (about 3psi). When the hub is submerged, water cannot enter the hub because of this pressure. It's a great way to extend bearing life and service your bearings in-between hub re-packs. Bearing Buddy's help keep dirt and water out of your hubs and bearings.
The Key benefit to the Trailer Buddy system over other greasing methods would be the ability to fill your Hubs bearing chamber using a standard grease gun, while simultaneously creating a pressure lock to prevent water from penetrating your wheel bearings.
Installation of this item is very simple and can be done with common household tools. Using a hammer and piece of wood, by applying even pressured strikes with the hammer, the Bearing Buddy will fit snugly into the outer face of your trailer hub. If you notice that your Trailer Buddy fits loosely into your hub, you may have a hub that has been worn through excessively use and it may be time for a replacement, as it is crucial to be able to install this item snugly.
Be mindful not to over fill the Trailer Buddy product. Overfilling will result in your rear grease seal blowing out, leading to premature exposure of your trailer bearings to water.
If you have lost or are regularly losing Trailer Buddies on your Boat or utility trailer, it may be possible that the inner surface of your hubs outer face is worn from excessive use. It is very common for Hubs to become worn from past bearing failure or just simply age.
Trailer Buddy Common Question:
How do I know if this Trailer Bearing Buddy will fit on my hub?
Answer: This is the 1.98 Size Trailer Bearing buddy that fits hubs with outside cap diameter of 1.98". Simply put, you can measure the outside face of your trailer hub to determine the correct width. In addition, this is the standard size for nearly all 4 Lug and 5 Lug trailer hubs. They are typically used on trailers with tire sizes ranging from 8 inch all the way up to 15 inch.