The Chelsea 890 Series Power Take-Off Assembly, part number 890RHFJW-B5XK or 890RHFJWB5XK, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mounting design positions the pump output flange at the rear of the transmission, placing the SAE C ("XS") output shaft where pump clearance is tightest. A one-piece main shaft eliminates input splines between the PTO and output extension, and the clutch is located at the rear of the housing so the gear section tucks close to the transmission. The wet-spline output extends pump shaft life in demanding duty cycles. Continuous torque capacity for the 890 Series reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. A genuine Chelsea part available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
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. The unit mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. Common applications include aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes. The 890 Series can be configured for transmissions with or without a cooler, retarder, or both.
Features
Hydraulic PowerShift (hot shift) engagement for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with rear-positioned SAE C ("XS") output shaft for improved pump clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output technology extends PTO and pump shaft service life
Continuous torque capacity up to 670 ft-lb; intermittent torque rated 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Input Gear Designator: FJ - Allison 3000 MD and 4000 HD Series
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP
- Shaft Power: 64 HP at 500 RPM; 128 HP 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. The unit mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. Common applications include aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes. The 890 Series can be configured for transmissions with or without a cooler, retarder, or both.
