The Chelsea 890LEFJW-G5XS or 890LEFJWG5XS is a hydraulic PowerShift PTO assembly from the Chelsea 890 Series, designed 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 lubrication to extend shaft life under demanding duty cycles. The 890 Series moves the PTO/pump mounting flange to the rear of the transmission, placing the pump output behind the transmission for improved clearance without requiring a separate extension unit. The main shaft is one piece, eliminating input splines between the PTO body and the output extension. Continuous torque rating reaches 670 ft-lb, with intermittent torque exceeding 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. Call us to confirm proper fit for your application.
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO, allowing the housing and gear section to sit tight against the transmission for maximum clearance. The 890 Series is a single-unit design, not a PTO with a bolt-on extension, making it well suited for aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes where pump space is limited and high torque is required. This unit is also referenced as part number SP890LEFJW-G5XS in some catalogs.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
SAE C (XS) output shaft with wet-spline lubrication for extended shaft and pump spline life
Continuous torque rating up to 670 ft-lb; intermittent torque exceeds 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design relocates pump output to rear of transmission for improved clearance without a separate extension
Tech Specs
- Transmission Compatibility: Allison 3000 MD and 4000 HD Series
- Product Series: Chelsea 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS) - Wet Spline
- 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 Type: Wet Spline
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO, allowing the housing and gear section to sit tight against the transmission for maximum clearance. The 890 Series is a single-unit design, not a PTO with a bolt-on extension, making it well suited for aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes where pump space is limited and high torque is required. This unit is also referenced as part number SP890LEFJW-G5XS in some catalogs.
