The Chelsea 890 Series Power Take-Off, part number 890JAFJW-B3ZS or 890JAFJWB3ZS, is a hydraulic hot-shift PTO engineered for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, gaining pump clearance that a standard side-mount PTO cannot provide. The one-piece main shaft eliminates the input splines found in a PTO-plus-extension arrangement, and the clutch is located at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline output technology reduces wear on both the PTO shaft and the pump shaft in continuous-duty cycles. Continuous torque rating for the 890 Series reaches up to 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. Typical applications include aerial trucks, fire and rescue, refuse, and crane service bodies. Call us to confirm proper fit for your specific transmission configuration.
Features
10-bolt mounting, SAE C output flange for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot-shift) engagement
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 eliminates input splines between PTO and output extension
Wet-spline output extends PTO and pump shaft life in demanding duty cycles
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Output
- Continuous Torque: Up to 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
- 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.
