The Chelsea 890 Series Power Take-Off, part number 890JAFJW-B3CF or 890JAFJWB3CF, is a hydraulic hot-shift PTO built specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt flange and features an SAE C ("XS") output shaft with Wet Spline technology to extend pump shaft life in demanding service. The one-piece main shaft eliminates the input splines between the PTO and the output extension, and the clutch is positioned at the rear of the housing so the gear section tucks tightly against the transmission, pushing the pump mounting flange rearward for improved clearance. Continuous-duty torque capacity reaches 670 ft-lb, with intermittent torque rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse, and truck crane service. Call us to confirm proper fit for your chassis and 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 lubrication to extend PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with rear-mounted clutch positions pump flange rearward for improved clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C ("XS")
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (verify actual rating on application pages)
- 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
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
