The Chelsea 892UAFJW-B5AZ or 892UAFJWB5AZ is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. The 892 Series moves the PTO pump mounting flange to the rear of the transmission, giving the pump improved clearance between the transmission and the frame rail. Mounting is 10-bolt with an additional rear support bracket. The output uses an SAE C flange and shaft with wet spline technology, which extends service life under demanding duty cycles. The one-piece main shaft eliminates input splines between the PTO body and the output, and the clutch is positioned at the rear of the housing so the gear section tucks tightly against the transmission. Typical applications include aerial trucks, fire and rescue equipment, refuse trucks, and truck cranes. 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 for added stability
SAE C output flange and shaft type
Wet spline output extends PTO and pump shaft life in demanding conditions
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Series: Chelsea 892
- Part Number: 892UAFJW-B5AZ or 892UAFJWB5AZ
- Transmission Fit: Allison 4700 Series
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant/Output: Wet Spline (W)
- Series Intermittent Torque Rating: 501+ lb-ft
- Series Output Power: 56+ HP
Additional Information
The Chelsea 892 Series is a single-unit PTO, not a PTO with a separate extension. The clutch is located at the rear of the PTO housing, allowing the gear section to fit tightly against the transmission for improved clearance between the unit and the truck frame rail. Wet spline technology on the output shaft reduces wear during high-cycle or continuous-duty operation. Common applications for this series include aerial trucks, fire and rescue vehicles, pumper cleaners, refuse trucks, and truck cranes. The 892 Series can be configured for transmissions equipped with or without a cooler or retarder. Parker documentation for this series includes the 890/892/897/899 Series Owner's Manual and the 892 Series Parts List (HY25-2892-M1_US). Call Pro Gear and Transmission to confirm this configuration is correct for your transmission and pump setup.Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
