The Chelsea 890 Series Power Take-Off, part number 890JCFJW-B3ZS or 890JCFJWB3ZS, 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 features an SAE C outlet flange with an SAE C ("XS") output shaft. The extended one-piece main shaft moves the pump mounting flange to the rear of the transmission, improving clearance between the pump and the frame rail without requiring a separate extension unit. Wet Spline output technology reduces wear on the PTO and pump shaft in demanding service. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque rated at 501-plus 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 work. Call us to confirm proper fit for your specific transmission configuration.
Features
10-bolt hydraulic hot-shift (PowerShift) engagement for Allison 3000 MD and 4000 HD Series transmissions
SAE C outlet flange with SAE C ("XS") output shaft configuration
Continuous-duty torque rating of 670 ft-lb; intermittent torque rated at 501-plus lb-ft
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet Spline output extends pump shaft and PTO spline service life in high-demand applications
One-piece extended main shaft relocates pump flange to rear of transmission for improved pump-to-frame clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot-Shift (PowerShift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Output
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque Rating: 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/Output: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit PTO design, not a PTO with a bolt-on extension. The one-piece main shaft eliminates input splines between the PTO body and the output, and the clutch is positioned at the rear of the housing so the gear section sits tightly against the transmission for maximum clearance between the pump and the frame rail. The unit mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for added support. The 890 Series is compatible with Allison 3000 and 4000 transmissions equipped with or without a cooler, retarder, or both. Typical applications include aerial trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment where pump space is limited and high continuous torque is required.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
