The M20030 Gear Case Accessory Drive Bushing Remover & Installer is a precision-engineered service tool designed for Cummins NT and NH series diesel engines, specifically for servicing the front gear case accessory drive bushings.
This tool is used to both extract worn bushings and install new bushings within the accessory drive housing without damaging the bore or misaligning the shaft. It is designed for use at the front of the gear case, and is not compatible with later platforms such as the N14.
Accessory drive bushings support rotating shafts that power critical components such as:
- Fuel pump drives
- Air compressor drives
- Alternator/generator drives
These bushings operate under constant load and require precise alignment. When worn, they can cause:
- Shaft misalignment
- Oil leakage
- Premature gear or bearing wear
The M20030 uses a guided pull-and-press system, allowing controlled removal and installation while maintaining bore integrity. The tool aligns with the housing and applies centered axial force, preventing distortion or scoring of the gear case.
Unlike improvised methods, which can damage the housing or install bushings unevenly, the M20030 ensures:
- Proper bushing alignment
- Correct seating depth
- Preservation of housing tolerances
Built from high-strength steel, this tool is designed for repeated use in heavy-duty diesel repair environments, making it essential for engine rebuilders and shops servicing legacy Cummins NT/NH platforms.
Key Features & Benefits
- Removes & Installs Bushings: Dual-function tool for complete service operation
- Front Gear Case Application: Specifically designed for front accessory drive bushings
- Centered Force Application: Prevents bore damage and misalignment
- Guided Installation System: Ensures bushings are installed square and to proper depth
- Protects Critical Components: Eliminates risk of housing distortion or scoring
- Application-Specific Fit: Designed for Cummins NT/NH engines
- Heavy-Duty Construction: Built for repeated professional use
Typical Applications
- Accessory drive bushing removal and installation (front gear case)
- Fuel pump drive bushing service
- Alternator/generator drive bushing replacement
- Air compressor drive service
- Engine overhaul and rebuild procedures
Why It Matters
Accessory drive bushings are critical for maintaining shaft alignment and oil control in Cummins NT engines. Improper service can result in:
- Misaligned shafts
- Oil leaks at the gear case
- Accelerated wear of accessory components
Using incorrect tools (or improvised methods) often leads to:
- Damaged housing bores
- Crooked bushing installation
- Repeat failures
The M20030 eliminates these risks by providing a controlled, aligned removal and installation process, ensuring the job is done correctly the first time.