The Chelsea 892HDFJW-D5XY or 892HDFJWD5XY is a hydraulic hot-shift power take-off from the Chelsea 892 Series, designed specifically for Allison 4700 Series transmissions. The 892 Series relocates the PTO and pump mounting flange to the rear of the transmission, creating better pump clearance in tight frame-rail installations. It mounts via a 10-bolt pattern and uses an SAE C outlet flange and SAE C output shaft. The one-piece main shaft eliminates input splines between the PTO and output extension, while wet spline technology protects the output under demanding, continuous-duty pump operation. The 892 Series is a self-contained single unit - no separate extension required. Common applications include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Designed for Allison 4700 Series transmissions
10-bolt mounting pattern
SAE C outlet flange and output shaft
Hydraulic hot-shift engagement
Wet spline output technology for extended pump shaft life
One-piece main shaft - no PTO-to-extension input splines
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- Transmission Fit: Allison 4700 Series
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Series Intermittent Torque Rating: 501+ lb-ft
- Series Output Power: 56+ HP
Additional Information
The Chelsea 892 Series is a purpose-built solution for applications where pump clearance is limited between the transmission and frame rail. Unlike a standard side-mounted PTO paired with an extension, the 892 is a single integrated unit whose clutch is positioned at the rear of the housing, allowing the gear section to sit tight against the transmission. The rear-mounted pump flange provides adequate working space for high-flow hydraulic pumps used in demanding vocational equipment. Typical markets include aerial, fire and rescue, defense, on-highway, and other mobile hydraulic applications. Part number 892HDFJW-D5XY is also referenced as SP892HDFJW-D5XY in some distributor records. Pro Gear and Transmission supplies genuine Chelsea PTOs - give us a call if you need help confirming the right configuration for your truck.Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
