The Chelsea 890CAFJW-K3CS or 890CAFJWK3CS is a hydraulic hot-shift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and uses a one-piece main shaft that eliminates the input splines between the PTO body and the output extension, placing the clutch at the rear of the housing so the gear section tucks tightly against the transmission for improved frame-rail clearance. The SAE C ("XS") output shaft uses wet-spline technology to extend pump shaft life under demanding duty cycles. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series is suited for aerial, fire and rescue, refuse, and truck crane applications. Call us to confirm proper fit for your specific Allison configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic hot-shift (PowerShift) engagement
SAE C ("XS") wet-spline output shaft extends pump spline 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
One-piece main shaft with rear-mounted clutch improves pump clearance without a separate extension
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") Wet-Spline Output
- Continuous Torque Rating: 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
- Lubricant: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
