The Chelsea 892HDFJW-B5XY or 892HDFJWB5XY is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. The 892 Series relocates the PTO and pump mounting flange to the rear of the transmission, improving pump clearance in tight frame-rail installations. It mounts via a 10-bolt pattern like a standard side-mounted PTO and adds a rear bracket for structural support. The output uses an SAE C flange and wet spline technology to extend PTO and pump shaft life under continuous-duty loads. The series is rated for intermittent torque above 501 lb-ft, with output power exceeding 56 HP. A single one-piece main shaft eliminates input splines between the PTO and output extension. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 892 Series hydraulic hot-shift PTO
10-bolt mounting for Allison 4700 Series transmissions
SAE C outlet flange and SAE C output shaft type
Wet spline output extends PTO and pump shaft life
Intermittent torque rating: 501+ lb-ft; output power: 56+ HP
Extended rear-mount design improves pump clearance in tight frame-rail installations
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot-Shift
- Transmission Fit: Allison 4700 Series
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Output Power: 56+ HP / 51+ kW
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Dimensions (H x W x L): 13 in. x 11 in. x 38 in.
Additional Information
The Chelsea 892 Series is designed as a single-unit PTO, not a PTO with a separate extension. The clutch is positioned at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission for improved clearance between the unit and the frame rail. The 892 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both. Typical markets include on-highway commercial, aerial, fire and rescue, defense, and other mobile equipment applications. Reference documents for this series include the 890/892/897/899 Series Owner's Manual and the 892 Series Parts List (HY25-2892-M1_US).Parts manual and diagrams: Chelsea 892 Series PTO parts list with prices
