The Chelsea 890HBFJW-B5XV or 890HBFJWB5XV is a hydraulic powershift PTO assembly from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses an SAE C (XS) output shaft with wet-spline lubrication to extend shaft and pump spline life under demanding duty cycles. The single-piece main shaft eliminates input splines between the PTO and output extension, and the clutch positions at the rear of the housing so the gear section sits tight against the transmission for improved pump clearance. Continuous torque rating reaches 670 ft-lb. Shaft power delivery is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Available from Pro Gear and Transmission. Call us to confirm proper fit for your specific vehicle and transmission configuration.
The Chelsea 890 Series fits neatly between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. The 890 Series suits aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes where pump space and high continuous torque are priorities. It can be ordered for transmissions with or without a cooler, retarder, or both.
Features
Chelsea 890 Series, designed exclusively for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot shift) operation via 10-bolt mounting
SAE C (XS) output shaft with wet-spline lubrication for extended shaft and pump spline life
Single-piece main shaft design eliminates input splines between PTO body and output extension
Rear-positioned clutch moves the housing tight to the transmission for improved pump clearance
Continuous torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Compatibility: Allison 3000 Series (MD) and 4000 Series (HD)
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS) Output
- Outlet Flange Type: SAE C
- Lubricant/Spline Type: Wet Spline
- Continuous Torque Rating: 670 lb-ft (verify rating on application pages)
- 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
Additional Information
The Chelsea 890 Series fits neatly between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. The 890 Series suits aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes where pump space and high continuous torque are priorities. It can be ordered for transmissions with or without a cooler, retarder, or both.
