John Deere® Compatible Vertical Unload Gear Case Rebuild Kit
Restore your unloading system's performance with this premium C&M vertical unload auger gearcase rebuild kit. Specifically assembled for late-model John Deere® 70 Series and all S-Series combine harvesters, this kit provides a high-strength alternative to purchasing a complete new gearcase assembly.
Assembled in Australia, this exclusive kit contains the essential components required to refurbish your gearbox (OEM # DE30569) for a fraction of the cost. By utilising high-performance seals and precision-machined gears, this rebuild kit ensures a longer service life for your unloading drive system, keeping your machine in top condition during high-capacity harvest periods.
John Deere® OEM Component Cross-Reference
Rebuild kit for gearbox: DE30569
- Gear Assembly Shaft: HXE138955 (1-3/4" x Z20 Spline)
- Bevel Gear Set: DE20711 (Z23/23 Tooth)
- Bearings & Shims: JD8524 (Ball Bearings), AH138955 (Shim Kit), 24H1533 (Plain Shim)
- Seals: AH90963 (Internal Oil), H135192 (Front), H135193 (Rear)
Vertical Gearcase Rebuild Compatibility: John Deere STS & S-Series
| Series |
Model |
Serial/Reference |
| John Deere® STS 70 Series |
9470STS, 9570STS, 9670STS, 9770STS |
Standard Fitment |
| John Deere® S600 Series |
S660, S670, S680, S690 |
Standard Fitment |
| John Deere® S700 Series |
S760, S770, S780, S790 |
Standard Fitment |
| John Deere® S7 Series |
S7 600, S7 700, S7 800, S7 900 |
Standard Fitment |
Technical Specifications & Features
- Manufacturer: Proudly assembled in Australia by C&M (Collier & Miller).
- Shaft Profile: 1-3/4" Diameter with Z20 Spline.
- Gear Ratio: Bevel Gear Set featuring Z23/23 Tooth profile.
- Completeness: Contains essential gears, shafts, bearings, shims, and seals.
- Wear Rating: Extended wear components for heavy-duty unloading.
- Dispatch: Available for fast Australia-wide shipping from Collier & Miller.
Expert Maintenance Review
The vertical unload gearcase is under immense stress during the unloading cycle. Failure typically begins with seal degradation, which allows oil to leak and leads to rapid gear and bearing failure. We recommend checking the oil level and inspecting for leaks at the front and rear seals during every preventative maintenance check.
Using this high-performance rebuild kit allows for a total internal refresh. Replacing the bevel gears and shafts together ensures correct gear meshing, which reduces heat and noise. This extended wear solution prevents catastrophic gearbox seizure mid-harvest, ensuring your grain handling remains at peak efficiency.
Installation Tip: Shim for Success
When rebuilding the DE30569 gearcase, precision shimming is vital to achieve the correct backlash between the Z23 bevel gears. Improper shimming will lead to premature gear wear and noise. Always use the included AH138955 shim kit to verify tolerances before final assembly to ensure a high-strength, long-lasting repair.