SKF BK4 Locking Hub Service Kit

SKF BK4 Locking Hub Service Kit

SKF BK4 is a locking hub service kit built around a needle roller bearing application with a 1.125-inch inside diameter, 1.375-inch outside diameter, and 0.500-inch width. It is a direct service part for driveline and axle maintenance on select Ford Bronco II and Ford Ranger models.

Key Features

• Needle roller bearing design for compact hub service applications
• 1.125-inch inside diameter for the specified hub fitment
• 1.375-inch outside diameter for precise bearing seating
• 0.500-inch width for the listed service application
• SKF-engineered replacement part for driveline and axle service
• Part number BK4 for easy identification and ordering

Detailed Description

SKF BK4 is a locking hub service kit intended for vehicles that use a compact needle roller bearing in the hub assembly. The bearing dimensions are critical for proper fit and function, and this part is specified with a 1.125-inch inside diameter, 1.375-inch outside diameter, and 0.500-inch width. It is a fitment-based replacement for 1984-1989 Ford Bronco II and 1983-1989 Ford Ranger applications, making it a relevant choice when servicing the front hub area on those vehicles. The BK4 part number is also useful when cross-checking service records or matching an existing bearing reference.

This part cross-references Monroe Shocks & Struts (e.g., 1458BK4, 9759BK4) for the same application.

What It Helps Fix

• Hub bearing wear that can create looseness in the locking hub assembly
• Noise from a dry, pitted, or damaged needle roller bearing
• Improper hub operation caused by incorrect bearing dimensions
• Front driveline service needs on Ford Bronco II and Ford Ranger models
• Restoration work requiring a correct BK4 hub service reference

Installation Notes and Tips

Verify the bearing dimensions against the removed part before installation. Clean the hub bore thoroughly, inspect the mating surfaces for scoring or wear, and confirm that the locking hub assembly is the correct style for the vehicle. For 1984-1989 Ford Bronco II and 1983-1989 Ford Ranger service, match the BK4 part number and dimensions to the original application before assembly.

Quality Assurance

SKF has more than 100 years of engineering and manufacturing experience, and its components are produced to high quality standards for long service life and safety. SKF BK4 reflects that approach with a precision bearing specification for driveline and axle service.