The Chelsea 890RFFJW-D5XY or 890RFFJWD5XY is a 890 Series hydraulic PowerShift power take-off built specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump output to the rear of the transmission, giving the PTO-to-pump interface more working clearance than a conventional side-mount arrangement. The one-piece main shaft eliminates the input splines between the PTO body and the output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Output is SAE C configuration with Wet Spline Technology to reduce wear on both the PTO and pump shaft in demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lb, with intermittent capacity above 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your chassis and pump configuration.
The Chelsea 890 Series is engineered as a single-unit PTO, not a PTO paired with a separate extension. It fits between the transmission and the frame rail and includes a supplemental bracket at the rear of the transmission for added support. The design accommodates Allison transmissions configured with or without a cooler, retarder, or both. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, truck cranes, and snow and ice equipment.
Features
890 Series hydraulic PowerShift (hot-shift) PTO for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting; rear-of-transmission pump location improves pump clearance over standard side-mount PTOs
SAE C (XS) output shaft with Wet Spline Technology extends PTO and pump shaft service life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque rated above 501 ft-lb
One-piece main shaft design eliminates input splines between PTO body and output extension
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission: Allison 3000 MD and 4000 HD Series
- Product Series: 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
- Shaft Power: 64 HP at 500 RPM; 128 HP at 1,000 RPM
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series is engineered as a single-unit PTO, not a PTO paired with a separate extension. It fits between the transmission and the frame rail and includes a supplemental bracket at the rear of the transmission for added support. The design accommodates Allison transmissions configured with or without a cooler, retarder, or both. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, truck cranes, and snow and ice equipment.
