The Chelsea 892HFFJW-B5AF or 892HFFJWB5AF is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. The design relocates the PTO and pump mounting flange to the rear of the transmission, carving out clearance between the transmission and the frame rail without requiring a separate extension. A one-piece main shaft eliminates the input splines found in two-piece designs. The clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Output uses Chelsea Wet Spline Technology for extended PTO and pump shaft life. The unit mounts via a 10-bolt pattern and features an SAE C outlet flange and SAE C output shaft. Call us to confirm proper fit for your specific Allison 4700 configuration.
Features
Designed for Allison 4700 Series transmissions
Hydraulic hot-shift operation
10-bolt mounting with SAE C outlet flange and SAE C output shaft
Wet Spline output extends PTO and pump shaft service life
One-piece main shaft eliminates input splines between PTO and output extension
Pump flange relocated to rear of transmission for improved clearance
Tech Specs
- Series: Chelsea 892
- Application: Allison 4700 Series transmissions
- Shift Type: Hydraulic (hot shift)
- Mounting: 10-bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Lubrication: Wet Spline
- Intermittent Torque Rating (series): 501+ lb-ft
- Output Power (series): 56+ HP
Additional Information
Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
