Description
The Chelsea 890CEFJW-B3CF or 890CEFJWB3CF is a hydraulic PowerShift PTO assembly built for Allison 3000 MD and 4000 HD Series transmissions. Part of the Chelsea 890 Series, it mounts via a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, extending pump clearance without requiring a separate extension unit. The main shaft is a single one-piece design, eliminating input splines between the PTO and output extension. Wet-spline output technology reduces wear on the PTO and pump shaft under demanding duty cycles. Continuous-duty torque reaches 670 ft-lb, with intermittent ratings starting above 501 ft-lb. Shaft power runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue units, refuse trucks, and truck cranes. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
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 to extend PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Single one-piece main shaft eliminates input splines between PTO body and output extension for improved pump clearance
Tech Specs
- Transmission Compatibility: Allison 3000 MD & 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, 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
- Dimensions (H x W x L): 13 in. x 11.75 in. x 31.38 in.
Additional Information
The Chelsea 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 tuck closely against the transmission for tighter clearance between the unit and the frame rail. The 890 Series is a single assembly, not a PTO paired with a separate extension, which simplifies installation and reduces potential leak points. Common applications include aerial 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.
