The Chelsea 892 Series Power Take-Off, part number 892UAFJW-B5XK or 892UAFJWB5XK, is a hydraulic PowerShift PTO engineered for Allison 3000 MD and 4000 HD Series transmissions, including the 4700 Series. The 892 Series mounts via a 10-bolt pattern on the side of the transmission, with an additional rear bracket for support, positioning the SAE C output flange toward the rear of the transmission to improve pump clearance. The one-piece main shaft eliminates intermediate input splines, and the clutch is located at the rear of the housing, letting the gear section tuck tightly against the transmission. Continuous-duty torque capacity reaches 670 lb-ft, with intermittent torque rated above 501 lb-ft. Output power exceeds 56 HP at the shaft. Wet Spline lubrication is standard on this assembly, extending spline life under demanding duty cycles. Typical applications include aerial trucks, fire and rescue apparatus, truck cranes, refuse trucks, and snow and ice equipment. Call us to confirm the proper fit for your specific transmission configuration.
The 892 Series is a single-unit design, not a PTO with a separate extension. The clutch is positioned at the rear of the housing, allowing the gear section to sit close to the transmission for tighter clearance. The unit mounts like a standard side-mounted PTO but includes a supplemental bracket at the rear of the transmission for added support. It can be ordered to accommodate transmissions equipped with or without a cooler, retarder, or both. Common markets include aerial, fire and rescue, defense, on-highway, and other mobile applications.
Features
Chelsea 892 Series, hydraulic PowerShift (hot shift) operation
Fits Allison 3000 MD and 4000 HD Series transmissions (including 4700 Series), 10-bolt mounting
SAE C output flange with SAE C (XS) extended output shaft for improved pump clearance
Continuous-duty torque rating up to 670 lb-ft; intermittent torque rated above 501 lb-ft
Wet Spline lubrication standard, extending PTO and pump shaft life in high-demand applications
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Compatibility: Allison 3000 MD and 4000 HD Series (including 4700 Series)
- Product Series: 892
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Extended Output
- Lubrication: Wet Spline
- Continuous Torque: 670 lb-ft / 908 Nm (verify on application pages for actual rating)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Output Power: 56+ HP / 51+ kW
- Shaft Power at 500 RPM: 64 HP / 48 kW
- Shaft Power at 1,000 RPM: 128 HP / 95 kW
Additional Information
The 892 Series is a single-unit design, not a PTO with a separate extension. The clutch is positioned at the rear of the housing, allowing the gear section to sit close to the transmission for tighter clearance. The unit mounts like a standard side-mounted PTO but includes a supplemental bracket at the rear of the transmission for added support. It can be ordered to accommodate transmissions equipped with or without a cooler, retarder, or both. Common markets include aerial, fire and rescue, defense, on-highway, and other mobile applications.
Parts manual and diagrams: Chelsea 892 Series PTO parts list with prices
