The Chelsea 890 Series Power Take-Off, part number 890RGFJW-B5XY or 890RGFJWB5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and locates the SAE C pump output flange to the rear of the transmission, fitting between the transmission and the frame rail to maximize pump clearance without the need for a separate extension. The main shaft is a single one-piece design, eliminating input splines between the PTO and output extension. Shift actuation is hydraulic PowerShift. The SAE C (XS) output uses wet-spline technology to extend pump shaft life in demanding duty cycles. Continuous torque rating reaches 670 ft-lb, with intermittent torque above 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1000 RPM. Typical applications include aerial trucks, fire and rescue, refuse, and truck crane work. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) actuation
SAE C (XS) output shaft with wet-spline technology for extended pump shaft life
Single one-piece main shaft eliminates input splines between PTO and output extension
Continuous torque rating up to 670 ft-lb; intermittent torque above 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Tech Specs
- Transmission Fitment: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (check application pages for actual torque ratings)
- 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 1000 RPM
Additional Information
The 890 Series mounts like a standard side-mounted PTO but adds a rear bracket at the transmission for additional support. Its clutch is positioned at the rear of the housing, allowing the gear section to sit tightly against the transmission for improved clearance. The series is available for transmissions equipped with or without a cooler, retarder, or both. Common duty applications include aerial trucks, fire and rescue vehicles, refuse trucks, pumper cleaners, and truck cranes. Part number 890RGFJW-B5XY is also referenced as SP890RGFJW-B5XY.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
