Komatsu Cross Pin Assembly – Genuine Part 103-12-24100 for D20/D21 Bulldozers

The Komatsu Cross Pin Assembly (Part No. 103-12-24100) is a critical component in the universal joint of the transmission system for select Komatsu bulldozer models. This assembly facilitates efficient torque transmission between shafts, allowing for angular misalignment while maintaining performance under demanding conditions such as construction, earthmoving, and heavy equipment operations.

Key Specifications:

• Weight: 0.65 kg
• Assembly Components: Includes the main cross pin and associated bearings for secure fitting (diagram reference: Position 1 in universal joint schematics).
• Material and Build: Constructed from high-strength steel for enhanced wear resistance and longevity, meeting OEM standards for genuine Komatsu parts.
• Quantity per Unit: Typically 1 per universal joint, with 2 often required per transmission assembly depending on model.

Compatible Models: This part is compatible with a range of Komatsu bulldozers, including:

• D20A-5 (S/N 45001-UP), D20A-6 (S/N 60001-UP), D20A-7-M (S/N 78604-UP)
• D20AG-7 (various S/N), D20P-5, D20P-6 (S/N 60001-UP), D20P-7A
• D20PG-7A, D20PL-5, D20PL-6, D20PL-7-M
• D20PLL-6, D20PLL-7-M, D20Q-5, D20Q-6, D20Q-7-M
• D20QG-6, D20S-5, D20S-6, D20S-7-M
• D21A-5, D21A-6, D21A-7 (S/N 78604-UP), D21A-8
• D21AG-7, D21E-6, D21P-5, D21P-6 (S/N 60001-UP)
• D21P-7A, D21P-8, D21PG-7A, D21PL-5, D21PL-6
• D21PL-7-M, D21Q-5, D21Q-6, D21Q-7-M
• D21QG-6, D21QG-7, D21S-5, D21S-6, D21S-7
• DDM020-5K-AT, DDM020-5L-6, DDM020-5M-O

Always verify compatibility with your specific machine’s serial number through an authorized Komatsu dealer or parts catalog for optimal fit and performance.

Benefits and Usage: Engineered for reliability, this cross pin assembly reduces downtime by providing robust support in the power train. It’s ideal for maintenance or replacement in F2-R2 or F3-R3 transmission configurations. Aftermarket options are available for cost savings, but genuine Komatsu parts ensure adherence to factory specifications for safety and efficiency.

For installation, refer to Komatsu service manuals. Professional installation is recommended to maintain equipment integrity.