The Chelsea 890RGFJW-B5XK or 890RGFJWB5XK is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers an SAE C ("XS") output flange, making it a direct fit for high-demand pump applications. The 890 Series design positions the PTO housing and gear section tight against the transmission, then extends the shaft rearward so the pump output clears the frame rail. A one-piece main shaft eliminates the input splines between the PTO body and the output extension. Wet-spline lubrication is built in to protect the output shaft under continuous-duty loads. Continuous-duty torque capacity reaches 670 lb-ft; intermittent torque rating exceeds 501 lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue, refuse, and truck crane work. Available from Pro Gear and Transmission. Call us to confirm proper fit for your transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
SAE C ("XS") output flange and extended shaft for improved pump clearance
Continuous-duty torque capacity up to 670 lb-ft; intermittent torque exceeds 501 lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet-spline output technology protects PTO and pump shaft under demanding duty cycles
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Extended Output
- Lubricant/Spline: Wet Spline
- Continuous Torque: 670 lb-ft (verify actual 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 mounts like a standard side-mount PTO but adds a rear bracket at the back of the transmission for additional support. Unlike a PTO-plus-extension two-piece design, the 890 Series is a single unit with a one-piece main shaft, which eliminates the input splines between the PTO body and the output extension. The clutch is positioned at the rear of the housing so the gear section sits close to the transmission, keeping the overall package compact between the transmission and the frame rail. The wet-spline output extends service intervals in high-cycle or continuous-duty applications. Common fitments include aerial work trucks, fire and rescue apparatus, pumper cleaners, refuse trucks, and truck cranes. The 890 Series can be configured for transmissions equipped with a cooler, retarder, both, or neither.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
