The Chelsea 892HAFJW-B5ZS or 892HAFJWB5ZS is a hydraulic hot-shift power take-off from the Chelsea 892 Series, purpose-built for Allison 4700 Series transmissions. The 892 Series moves the PTO and pump mounting flange to the rear of the transmission, creating better pump clearance in tight frame-rail installations. It mounts on a 10-bolt pattern with an additional rear bracket for support and features an SAE C outlet flange and SAE C output shaft. A one-piece main shaft eliminates input splines between the PTO body and the output extension. The wet spline output extends PTO and pump shaft life in demanding, continuous-duty applications. Typical uses include aerial trucks, fire and rescue equipment, truck cranes, and refuse trucks. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 892 Series hydraulic hot-shift PTO
Designed for Allison 4700 Series transmissions
10-bolt mounting with rear support bracket
SAE C outlet flange and SAE C output shaft
Wet spline output for extended PTO and pump shaft life
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Series: Chelsea 892
- Shift Type: Hydraulic hot shift
- Mounting Type: 10-bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- Input Gear Designator: FJ - Allison 3000 MD and 4000 HD Series
- Series Intermittent Torque Rating: 501+ lb-ft
- Series Output Power: 56+ HP
- Transmission Fitment: Allison 4700 Series
- Dimensions (H x W x L): 13 in. x 11 in. x 38 in.
Additional Information
The Chelsea 892 Series is a single-unit PTO, not a PTO with a bolt-on 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. This design is well suited for aerial trucks, fire and rescue vehicles, pumper cleaners, truck cranes, and refuse trucks where pump space is limited and high continuous-duty torque is required. The 892 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both. Part number 892HAFJW-B5ZS is also referenced as SP892HAFJW-B5ZS. Sold by Pro Gear and Transmission.Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
