The Chelsea 890 Series Power Take-Off, part number 890NFFJW-B3XV or 890NFFJWB3XV, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mounting configuration and rear-located pump flange position the output behind the transmission, creating better clearance between the pump and the frame rail without requiring a separate extension. The main shaft is one piece, which eliminates the input splines between the PTO and the output extension. An SAE C output shaft with wet-spline lubrication reduces wear on the mating pump shaft in demanding duty cycles. Continuous-duty torque capacity for the 890 Series reaches 670 ft-lb; intermittent torque is rated at 501 ft-lb and above. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic hot-shift (PowerShift) engagement
SAE C output shaft with wet-spline lubrication to extend pump shaft life
One-piece main shaft eliminates input splines between PTO body and output extension
Rear-located pump flange positions output behind the transmission for improved clearance
Continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM and 128 HP at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift (PowerShift)
- Output Shaft Type: SAE C ("XS" Extended Shaft)
- Outlet Flange Type: SAE C
- Lubricant/Spline: 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 1,000 RPM
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO paired with a bolt-on extension. The clutch is positioned at the rear of the housing, allowing the gear section to sit tightly against the transmission for maximum clearance between the pump and the frame rail. This design suits aerial trucks, fire and rescue apparatus, snow and ice equipment, refuse trucks, and truck cranes where pump space is limited and high continuous torque is required. The 890 Series can be ordered for transmissions equipped with or without a cooler, a retarder, or both. Part number 890NFFJW-B3XV is also referenced as SP890NFFJW-B3XV. Sold by Pro Gear and Transmission.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
