CASE-IH® Compatible Rotor Drive Coupling (23-Spline)
Keep your rotor drive system in top condition with this premium aftermarket rotor drive coupling. Specifically engineered for Case IH® mid-series Axial-Flow combines, this 23-spline coupling is a critical component for maintaining reliable rotor drive performance.
This 23-tooth version is designed for later mid-series models and differs from earlier 17-spline versions. Implementing proactive
preventative maintenance by replacing worn couplings ensures an
extended service life for your rotor and prevents the costly downtime associated with rotor drive failure. We recommend counting the spline teeth or verifying your serial number prior to ordering to ensure exact fitment.
CASE-IH® OEM Cross-Reference
Replaces OEM Part Number: 87406731
23-Spline Rotor Drive Coupling for Case IH 2377, 2388, 2577, 2588 Axial-Flow Models
| Series |
Models |
Serial Range / Year |
| Case-IH® 2300 Series |
2377 Axial-Flow |
ASN HAJ300001 (EU) | BTW HAJ292001 to HAJ300000 (NA) |
| Case-IH® 2300 Series |
2388, 2388 AFX |
ASN HAJ300001 (EU) | BTW HAJ292001 to HAJ300000 (NA) |
| Case-IH® 2500 Series |
2577, 2588 |
ASN HAJ300001 (NA) |
Technical Specifications & Features
- Quality Assurance: Precision manufactured to keep your equipment in top condition.
- Configuration: 23-Tooth (23T) internal spline.
- Direct Fitment: Engineered to match Case IH® OEM part number 87406731.
- Assembly: Supplied as a complete coupling (mounting bolts not included).
- Maintenance Tip: Essential for high-load power transmission in Axial-Flow rotor systems.
- Available for fast Australia-wide dispatch from Collier & Miller.
Expert Maintenance Review
To keep your rotor drive system in top condition, we recommend a thorough inspection of the rotor gearbox input shaft and the rotor drive shaft splines when replacing this coupling.
Standard preventative maintenance for this assembly includes checking for spline "rounding" and ensuring mounting bolts are torqued to specification. Replacing worn couplings simultaneously ensures an extended service life for your rotor drive train and maintains consistent throughput in heavy crop conditions.