The Chelsea 890 Series Power Take-Off, part number 890CBFJW-B3XY or 890CBFJWB3XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mount and delivers an SAE C ("XS") output with a continuous-duty torque rating up to 670 ft-lb and intermittent torque of 501+ ft-lb. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The one-piece main shaft eliminates input splines between the PTO and output extension, while the wet-spline output helps extend pump shaft service life under demanding conditions. The 890 Series positions the pump mounting flange at the rear of the transmission, improving clearance between the PTO and the frame rail. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") output flange and shaft type
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with wet-spline output to extend PTO and pump shaft life
Rear-mounted pump flange design improves clearance between transmission and frame rail
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant/Output: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit design, not a PTO with a separate extension. The clutch is positioned at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission for improved frame-rail clearance. An additional support bracket at the rear of the transmission is included alongside the standard side-mount configuration. The 890 Series can be ordered for transmissions equipped with or without a cooler, a retarder, or both. Typical applications include aerial trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
