The Chelsea 892UDFJW-D5ZS or 892UDFJWD5ZS is a hydraulic hot-shift power take-off from the Chelsea 892 Series, engineered specifically for Allison 4700 Series transmissions. The design relocates the PTO and pump mounting flange to the rear of the transmission, creating better pump clearance compared to a conventional side-mounted unit. The one-piece main shaft eliminates the input splines between the PTO and the output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Mounting is 10-bolt with an SAE C output flange and shaft. Wet Spline Technology at the output extends PTO and pump shaft life under continuous-duty demand. The 892 Series is a single unit, not a PTO-plus-extension arrangement. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison 4700 build.
Features
Chelsea 892 Series PTO designed for Allison 4700 Series transmissions
Hydraulic hot-shift operation
10-bolt mounting with SAE C outlet flange and output shaft
Wet spline output extends PTO and pump shaft service life
One-piece main shaft eliminates input splines between PTO and output extension
Pump mounting flange positioned at rear of transmission for improved clearance
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Lubrication: Wet Spline
- Intermittent Torque: 501+ lb-ft (501+ Nm) series rating
- Output Power: 56+ HP (51+ kW) series rating
- Transmission Fit: Allison 4700 Series
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- NMFC Code: 128520 - Hydraulic PTOs, Pumps, Motors
Additional Information
The Chelsea 892 Series is suited for applications where pump clearance is limited and high continuous-duty torque is required. Common installations include aerial lift trucks, fire and rescue pumpers, refuse trucks, and truck cranes. The series accommodates transmissions configured with or without a cooler, a retarder, or both. An additional bracket at the rear of the transmission provides supplemental support for the unit. Parker Chelsea documents available for this series include the 890/892/897/899 Series Owner's Manual and the 892 Series Parts List (HY25-2892-M1_US).Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
