The Chelsea 890RDFJW-B5XY or 890RDFJWB5XY is a hydraulic hot-shift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and delivers an SAE C ("XS") output shaft, shifting via Hydraulic PowerShift. Continuous-duty torque reaches 670 ft-lbs, with intermittent torque rated above 501 ft-lbs. Shaft power output runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series relocates the pump mounting flange to the rear of the transmission, tucking between the transmission and frame rail for improved pump clearance. A one-piece main shaft eliminates the input splines between the PTO and the output extension. Wet-spline lubrication protects the output shaft and pump spline under demanding duty cycles. Call us to confirm proper fit for your application.
The Chelsea 890 Series fits aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes -- any application where pump space is limited and high continuous torque is required. The 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for maximum clearance. Because the 890 is a single unit with a one-piece main shaft, there are no input splines between the PTO body and the output extension. The unit can be ordered for transmissions equipped with or without a cooler or 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 for extended pump spline life
Continuous-duty torque rating up to 670 ft-lbs; intermittent torque rated 501+ ft-lbs
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-positioned pump flange on a one-piece main shaft for improved clearance between transmission and frame rail
Tech Specs
- Product Series: 890
- Transmission Fitment: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hydraulic Hot Shift)
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lbs (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lbs
- 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 fits aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, and truck cranes -- any application where pump space is limited and high continuous torque is required. The 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for maximum clearance. Because the 890 is a single unit with a one-piece main shaft, there are no input splines between the PTO body and the output extension. The unit can be ordered for transmissions equipped with or without a cooler or retarder, or both.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
