The Chelsea 890 Series Power Take-Off, part number 890LHFJW-B5XY or 890LHFJWB5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses hydraulic PowerShift engagement. The SAE C ("XS") output shaft with wet-spline lubrication reduces wear on the pump spline in demanding duty cycles. Unlike a PTO-plus-extension arrangement, the 890 Series uses a single one-piece main shaft, and the clutch sits at the rear of the PTO housing so the gear section tucks tightly against the transmission. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue equipment, truck cranes, and refuse trucks. 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) engagement
SAE C ("XS") output shaft with wet-spline technology for extended pump spline life
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Single one-piece main shaft design locates pump output to the rear of the transmission for improved clearance
Tech Specs
- Transmission Application: Allison 3000 MD Series and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- 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
Additional Information
The Chelsea 890 Series fits between the transmission and frame rail, positioning the pump output at the rear of the transmission where clearance is tightest. It mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The one-piece main shaft eliminates the input splines that exist when a standard PTO is paired with an output extension, and the clutch placement at the rear of the housing lets the gear section sit close to the transmission case. Wet Spline Technology is standard across the 890 Series, lubricating the output shaft interface to reduce wear in high-cycle applications such as aerial lifts, pumper trucks, snow and ice equipment, and refuse vehicles. The 890 Series can be configured for transmissions with or without a cooler, retarder, or both - verify your transmission build when ordering.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
