The Chelsea 890 Series Power Take-Off, part number 890LBFJW-B5XY or 890LBFJWB5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and carries an SAE C outlet flange with an SAE C ("XS") output shaft. The series delivers a continuous-duty torque rating up to 670 lb-ft and intermittent torque rated at 501+ lb-ft. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. A one-piece main shaft eliminates the input splines between the PTO body and the output extension, and wet-spline lubrication reduces wear on the PTO and pump shaft in demanding service. The clutch sits at the rear of the housing, allowing the gear section to sit tightly against the transmission for improved pump clearance. Call us to confirm proper fit for your application.
The 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. The one-piece main shaft eliminates the input splines that would otherwise exist between the PTO body and an output extension. The clutch assembly is located at the rear of the PTO housing, allowing the gear section to sit tightly against the Allison transmission for maximum clearance between the pump and the frame rail. The wet-spline output is standard across the 890 Series and provides lubrication at the PTO-to-pump interface under continuous duty. The 890 Series mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. Typical service applications include aerial trucks, fire and rescue apparatus, refuse trucks, truck cranes, and snow and ice equipment where both pump space and sustained high torque are critical requirements.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
Continuous-duty torque rating up to 670 lb-ft; intermittent torque rated 501+ lb-ft
SAE C ("XS") output shaft with wet-spline lubrication to extend PTO and pump shaft life
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Extended rear-mounted shaft relocates pump output for improved clearance between transmission and frame rail
Tech Specs
- Transmission: Allison 3000 MD & 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Wet-Spline Output
- Continuous Torque: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant: Wet Spline (W)
Additional Information
The 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. The one-piece main shaft eliminates the input splines that would otherwise exist between the PTO body and an output extension. The clutch assembly is located at the rear of the PTO housing, allowing the gear section to sit tightly against the Allison transmission for maximum clearance between the pump and the frame rail. The wet-spline output is standard across the 890 Series and provides lubrication at the PTO-to-pump interface under continuous duty. The 890 Series mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. Typical service applications include aerial trucks, fire and rescue apparatus, refuse trucks, truck cranes, and snow and ice equipment where both pump space and sustained high torque are critical requirements.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
