The Chelsea 890 Series Power Take-Off, part number 890LEFJW-D5XK or 890LEFJWD5XK, is a hydraulic PowerShift PTO 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 with continuous-duty torque rated up to 670 lb-ft and intermittent torque above 501 lb-ft. Shaft power reaches 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 the housing tightly against the transmission to maximize clearance between the pump and frame rail. The one-piece main shaft eliminates input splines between the PTO and output extension. Wet-spline lubrication protects the output shaft and pump spline under demanding duty cycles. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. 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 shaft with up to 670 lb-ft continuous-duty torque rating
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-mounted pump flange relocates output to improve clearance between pump and frame rail
Wet-spline output lubrication extends PTO and pump shaft service life
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
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual torque ratings
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubrication: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit PTO - not a PTO paired with a separate extension. Its one-piece main shaft eliminates the input splines that would otherwise exist between the PTO body and the output extension, reducing potential wear points. The clutch is positioned at the rear of the PTO housing so the gear section sits tight against the transmission, keeping the overall package compact where frame rail clearance is limited. An additional bracket at the rear of the transmission supplements the standard side-mount attachment for added support. The 890 Series is compatible with Allison transmissions fitted with or without a cooler, a retarder, or both. Typical applications include aerial work trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
