The Chelsea 890 Series Power Take-Off, part number 890LEFJW-D5XS or 890LEFJWD5XS, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mounting positions the pump output flange at the rear of the transmission, pulling the gear section tight against the transmission housing for maximum pump clearance between the unit and the frame rail. Unlike a PTO-plus-extension setup, the 890 Series uses a single one-piece main shaft, eliminating the input splines between the PTO body and the output extension. The SAE C output shaft features Wet Spline technology for extended pump shaft life in demanding duty cycles. Continuous torque rating reaches 670 lb-ft; intermittent torque exceeds 501 lb-ft. 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 application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic hot-shift (PowerShift) engagement
SAE C output shaft with Wet Spline technology to extend PTO and pump shaft life
Single one-piece main shaft eliminates input splines between PTO body and output extension
Continuous torque rating up to 670 lb-ft; intermittent torque exceeds 501 lb-ft
Shaft power: 64 HP at 500 RPM, 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 PowerShift (hot-shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C with Wet Spline (XS)
- 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 1,000 RPM
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit design, not a PTO paired with a bolt-on extension. The clutch is located at the rear of the PTO housing, allowing the gear section to mount flush against the transmission and clear the frame rail. This makes the 890 Series well suited for aerial trucks, fire and rescue apparatus, snow and ice equipment, truck cranes, and refuse trucks where pump space is limited and high continuous torque is required. The unit can be ordered for transmissions equipped with or without a cooler, a retarder, or both. Part number 890LEFJW-D5XS is also referenced as SP890LEFJW-D5XS.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
