The Chelsea 890ECFJW-B5XS or 890ECFJWB5XS is a hydraulic hot-shift PTO from the 890 Series, built specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting configuration and delivers an SAE C ("XS") output shaft with Wet Spline Technology to extend pump shaft life under demanding duty cycles. The one-piece main shaft eliminates input splines between the PTO and output extension, and the clutch position at the rear of the unit tucks the housing tightly against the transmission for improved pump clearance. Continuous-duty torque for the 890 Series reaches 670 ft-lbs, with shaft power rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial, fire and rescue, refuse, and truck crane service. Call us to confirm proper fit for your specific transmission configuration.
The 890 Series mounts like a standard side-mount PTO but includes an additional support bracket at the rear of the transmission. It is a single-unit design, not a PTO paired with a separate extension, which simplifies installation and reduces potential failure points. The 890 Series is suited for vehicles where pump space is restricted, including aerial trucks, fire and rescue apparatus, snow and ice equipment, and refuse trucks. Units can be ordered to accommodate transmissions equipped with or without a cooler or retarder.
Features
Hydraulic PowerShift (hot-shift) engagement for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting type with SAE C outlet flange
SAE C ("XS") Wet Spline output shaft extends pump spline life in high-demand applications
One-piece main shaft design eliminates input splines between PTO body and output extension
Clutch positioned at rear of unit to maximize clearance between transmission and frame rail
Continuous-duty torque up to 670 ft-lbs; shaft power 64 HP at 500 RPM and 128 HP at 1,000 RPM
Tech Specs
- Product Series: 890
- Transmission Fit: Allison 3000 MD and 4000 HD Series (Input Gear Designator: FJ)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Extended Output
- Lubricant/Spline: Wet Spline
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual torque ratings
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
Additional Information
The 890 Series mounts like a standard side-mount PTO but includes an additional support bracket at the rear of the transmission. It is a single-unit design, not a PTO paired with a separate extension, which simplifies installation and reduces potential failure points. The 890 Series is suited for vehicles where pump space is restricted, including aerial trucks, fire and rescue apparatus, snow and ice equipment, and refuse trucks. Units can be ordered to accommodate transmissions equipped with or without a cooler or retarder.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
