Case-IH® & New Holland® Compatible High-Speed Vertical Unload Gearbox Rebuild Kit
Restore your unloading system's performance with this premium C&M Australian-assembled vertical unload auger lower gearbox rebuild kit. Specifically engineered for CNH Flagship Axial-Flow and CR combine harvesters equipped with the high-speed lower unloading auger gearbox option, this kit provides an economical alternative to purchasing a complete new gearbox assembly.
A common failure point in high-capacity machines is wear on the output pinion shaft and bearings due to the extreme torque of high-speed unloading. This exclusive C&M kit allows you to refurbish the output pinion shaft side of the gearbox (OEM # 84262053) for a fraction of the cost. Featuring a 24-spline shaft and genuine Timken bearings, this extended wear solution ensures a longer service life and keeps your grain handling system in top condition.
CNH High-Speed Gearbox OEM Cross-Reference
Refurbishment Solution for Gearbox Numbers: 84262053, 4791987
| Part Number |
Description |
Qty |
| 47919897 |
Output Shaft (24-Spline High-Speed) |
1 |
| 86626475 / 87555831 |
Genuine Timken Taper Roller Bearing Assemblies |
2 |
| 86623222 / 86623221 |
Flange and Seal Kit |
Set |
| 86623216 / 86566099 |
Precision Shim Kit and Hex Socket Screws |
Set |
Model Compatibility & Fitment
Gearbox Rebuild Compatibility: CNH Flagship High-Speed Models
| Brand / Series |
Models |
Reference |
| Case-IH® Flagship |
7230, 8230, 9230, 7240, 8240, 9240, 7250, 8250, 9250 |
High Speed Gearbox Only |
| New Holland® CR Series |
CR8.90, CR9.90, CR10.90 |
High Speed Gearbox Only |
Technical Specifications & Features
- Manufacturer: Proudly assembled in Australia by Collier & Miller (C&M).
- Shaft Profile: 24-Spline output shaft specifically for High-Speed gearbox options.
- Bearings: Includes premium Timken Tapered Roller Bearings for maximum load capacity.
- Value: Cost-effective repair kit that avoids the need for a complete gearbox replacement.
- Precision: Includes high-accuracy Shim Kits to ensure correct gear meshing and backlash.
- Dispatch: Available for fast Australia-wide shipping from Collier & Miller.
Expert Maintenance Review
The vertical unload auger lower gearbox is under immense stress, especially when operating the high-speed unloading option in high-yield crops. Seal degradation is often the first sign of trouble; if left unaddressed, oil loss leads to rapid failure of the bearings and the 24-spline shaft. We recommend inspecting the output flange area for oil leaks during every preventative maintenance check.
Utilising this rebuild kit allows you to restore the integrity of the output side of the gearbox without the triple-figure expense of a new unit. Replacing the bearings, shaft, and shims as a matched set ensures a precision fit, preventing the vibration and heat buildup that leads to mid-harvest failures and ensuring a longer service life for your machine.
Installation Tip: Precision Shimming
When rebuilding the pinion shaft side of the gearbox, accurate shimming is critical to achieving the correct bearing preload and gear backlash. Using the included 86623216 shim kit, ensure you follow OEM specifications for tolerances. An incorrectly shimmed gearbox will run hot and suffer premature wear, even with new high-quality components.