The Chelsea 892UAFJW-D5AB or 892UAFJWD5AB is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. The design relocates the pump mounting flange to the rear of the transmission, improving clearance between the PTO and the frame rail without the need for a separate extension unit. The main shaft is one piece, eliminating input splines between the PTO and output extension. A 10-bolt mounting pattern secures the unit, and the SAE C output flange pairs with an SAE C output shaft. Wet Spline output technology extends pump shaft life under demanding duty cycles. The 892 Series carries an intermittent torque rating above 501 lb-ft with output power above 56 HP at the series level. Typical applications include aerial trucks, fire and rescue vehicles, truck cranes, and refuse trucks. Call us to confirm proper fit for your specific transmission configuration.
Features
Designed for Allison 4700 Series transmissions
Hydraulic hot-shift operation
10-bolt mounting pattern
SAE C output flange and SAE C output shaft
Wet Spline output extends PTO and pump shaft life
Rear-mounted pump flange improves clearance between PTO and frame rail
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubrication: Wet Spline
- Series Intermittent Torque: 501+ lb-ft / 501+ Nm
- Series Output Power: 56+ HP / 51+ kW
- Transmission Fitment: Allison 4700 Series
- 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 a single-unit PTO, not a PTO-plus-extension assembly. The clutch is positioned at the rear of the housing, allowing the gear section to sit tightly against the transmission for tighter clearance. The one-piece main shaft eliminates the input splines that are common on conventional PTO-extension combinations, reducing potential wear points. The 892 Series can be configured for transmissions equipped with or without a cooler or retarder. Common working environments include aerial platforms, fire and rescue apparatus, snow and ice control units, pumper cleaners, and truck cranes where both pump clearance and high torque capacity are priorities. Pro Gear and Transmission carries the Chelsea 892UAFJW-D5AB for buyers sourcing this specific configuration. Not sure this is the right unit for your transmission setup? Give us a call and we can help you confirm the fit.Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
