The Chelsea 890CFFJW-B3CK or 890CFFJWB3CK is a hydraulic hot-shift power take-off from the Chelsea 890 Series, purpose-built for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange at the rear of the transmission, moving the pump mounting point back to gain clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines found in a conventional PTO-plus-extension setup, and the wet-spline output extends pump shaft life under continuous-duty demand. Continuous-duty torque rating reaches 670 ft-lb; intermittent torque is 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 mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. It fits applications where pump space is limited, including aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes. The 890 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both.
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 to extend pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque rated 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design eliminates input splines between PTO and output extension for improved pump clearance
Tech Specs
- Transmission: Allison 3000 MD & 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") with 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
- Shaft Power: 64 HP at 500 RPM; 128 HP 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. It fits applications where pump space is limited, including aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes. The 890 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
