The Chelsea 892HCFJW-B5AF or 892HCFJWB5AF is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. This series mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, creating clearance where conventional side-mount PTOs fall short. The output uses an SAE C flange and wet spline technology, which extends spline life under continuous-duty demand. A one-piece main shaft eliminates the inter-PTO input splines common in extension-style designs. The 892 Series carries an intermittent torque rating above 501 lb-ft and 56-plus horsepower output, making it a proven fit for aerial trucks, fire and rescue units, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 892 Series, designed exclusively for Allison 4700 Series transmissions
Hydraulic hot-shift operation for engagement under load
10-bolt mounting with an additional rear bracket for added support
SAE C outlet flange and SAE C output shaft
Wet spline output technology to extend PTO and pump shaft service life
One-piece main shaft design eliminates input splines between PTO body and output extension
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
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Transmission Fitment: Allison 4700 Series
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
Additional Information
The 892 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for improved clearance in tight chassis installations. Unlike PTO-plus-extension configurations, the 892 Series is a single unit with a one-piece shaft. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission. The 892 can be ordered for transmissions with or without a cooler, retarder, or both. Typical applications include aerial trucks, fire and rescue vehicles, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes. Contact Pro Gear and Transmission to confirm the correct configuration for your chassis.Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
