The Chelsea 890RDFJW-G5XK or 890RDFJWG5XK is a hydraulic PowerShift power take-off built for Allison 3000 MD and 4000 HD Series transmissions. Part of the Chelsea 890 Series, it mounts via a 10-bolt pattern and delivers an SAE C ("XS") output flange. The one-piece main shaft eliminates input splines between the PTO and output extension, with the clutch positioned at the rear of the housing to tuck tightly against the transmission for improved pump clearance. Wet Spline output technology extends PTO and pump shaft life in demanding service. Continuous-duty torque reaches 670 ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1000 RPM. Suited for aerial trucks, fire and rescue, refuse, and truck crane applications. 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) operation
SAE C ("XS") output flange and output shaft type
One-piece main shaft with rear-mounted clutch for improved pump clearance
Wet Spline output extends PTO and pump shaft life
Continuous-duty torque rating of 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1000 RPM
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") Output
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- 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 Chelsea 890 Series is a single-unit PTO - not a PTO with a separate extension - designed to mount between the transmission and the frame rail. The housing and gear section tuck tightly to the transmission, while the clutch at the rear of the unit positions the pump output flange further rearward for adequate clearance in tight installations. The 890 Series can be ordered for transmissions equipped with a cooler, a retarder, both, or neither. Typical applications include aerial work trucks, fire and rescue pumpers, refuse trucks, and truck cranes where high torque output and pump space are both critical requirements. Call Pro Gear and Transmission to confirm the correct 890 Series configuration for your transmission and body-builder setup.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
