Bearing Buddy 42204 Stainless Steel Bearing Protector, 1.980 Inch Hub Diameter, Blue Grease Indicator

The Bearing Buddy 42204 is a pressurized stainless steel bearing protector built to stop the most common cause of trailer breakdowns: water-contaminated wheel bearings. It installs in place of a standard dust cap and uses a spring-loaded piston to hold a steady 3 psi of pressure inside the hub. That constant pressure keeps grease in and pushes water, mud, and road grit out, while a built-in pressure limit prevents overfilling or overpressurizing the hub, which would otherwise damage the inner seal.

Grease is added directly through a grease fitting in the center of the piston, so bearings can be serviced without removing the unit. A blue lubricant indicator on the piston lets you check grease level at a glance: press the edge of the piston, and if it rocks or moves, the hub is properly filled; if it will not move, it is time to add more grease.

Built entirely from stainless steel, the 42204 resists rust and corrosion in saltwater and other harsh environments and is manufactured in the USA. It fits hubs with a 1.980 inch inside diameter; measure the inside diameter of the trailer hub or the outside diameter of the dust cap before ordering to confirm fit, then tap the unit into place with a wood block and hammer. This is the version without a protective bra cover.

Specifications

• Brand: Bearing Buddy
• Manufacturer Part Number: 42204
• Material: Stainless Steel
• Style: Bearing Protector without Bra
• Compatible Hub Inside Diameter: 1.980 inches
• Bearing Number: 1980
• Bearing Type: Ball Bearing
• Compatible Lubricant: Grease
• Lubricant Indicator: Blue visual indicator
• Operating Pressure: 3 psi
• Country of Origin: USA
• Weight: 0.9 pounds
• UPC: 650209422044

Frequently Asked Questions

What size hub does the Bearing Buddy 42204 fit? The Bearing Buddy 42204 only fits hubs with a 1.980 inch inside diameter, so measure the inside diameter of your trailer hub or the outside diameter of your current dust cap with a caliper before ordering to confirm a correct fit.

What is the Bearing Buddy 42204 made of? It is manufactured from stainless steel, which resists rust and corrosion even in saltwater and other harsh environments, and it is made in the USA.

How do I know when to add more grease? Press the edge of the movable piston on the Bearing Buddy 42204: if it rocks or moves, the hub has enough grease; if the piston does not move at all, it is time to add more grease through the center grease fitting.

How much pressure does the bearing protector maintain? A spring-loaded piston inside the 42204 holds a steady 3 psi of pressure, which is enough to keep grease in and water, mud, and dust out without overpressurizing the hub.

Can overfilling this bearing protector damage the hub seal? No, the Bearing Buddy 42204 limits internal pressure to 3 psi specifically to prevent overfilling and overpressurization, which is the condition that damages the inner seal on a hub.

Does this version include a protective bra cover? No, the 42204 is the version without a bra; it is the bearing protector unit only.

How is the Bearing Buddy 42204 installed? After confirming the 1.980 inch hub inside diameter fits, the unit is tapped into place over the hub using a wood block and a hammer; no special tools are required.

What weight and bearing number apply to this part? The Bearing Buddy 42204 weighs 0.9 pounds and is built around bearing number 1980 with a ball bearing type.

What does the blue indicator on the piston mean? The blue lubricant indicator is a built-in visual cue on the piston face that lets you check grease fill level without disassembling the unit.

Is the Bearing Buddy 42204 just a dust cap replacement? It is more than a dust cap: the 42204 is a pressurized bearing cover and protector system that actively holds grease in and blocks out water and dirt, rather than simply capping the hub opening.

What type of lubricant does this bearing protector use? The Bearing Buddy 42204 is designed to be serviced with standard grease, added through the grease fitting in the center of the piston.

What applications is the Bearing Buddy 42204 used on? It is used on trailer hubs to protect wheel bearings, including boat trailers, horse trailers, RVs, and utility trailers, provided the hub matches the 1.980 inch inside diameter.