The Chelsea 890 Series Power Take-Off, part number 890NDFJW-B3XV or 890NDFJWB3XV, 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 positions the SAE C output flange to the rear of the transmission, moving pump clearance away from the frame rail without requiring a separate extension. The one-piece main shaft eliminates input splines between the PTO and output, and the wet-spline SAE C ("XS") output extends pump shaft life under demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lbs, with intermittent torque rated at 501+ ft-lbs. Shaft power is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Engagement is by hydraulic PowerShift. Call us to confirm proper fit for your application.
The Chelsea 890 Series is a single-unit design: no PTO-plus-extension combination. The clutch is located at the rear of the housing so the gear section sits tight against the transmission, keeping the overall package compact between the transmission and frame rail. The 890 Series accommodates transmissions fitted with or without a cooler or retarder. Typical applications include aerial trucks, fire and rescue apparatus, snow and ice equipment, and truck cranes where pump space is limited and high continuous torque is required.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") wet-spline output shaft extends pump spline life
Continuous-duty torque rating: 670 ft-lbs; intermittent torque: 501+ ft-lbs
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-mounted output positions pump clear of the frame rail without a separate PTO 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
- Continuous Torque Rating: 670 ft-lbs (check application pages for actual torque ratings)
- Intermittent Torque Rating: 501+ ft-lbs
- 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
The Chelsea 890 Series is a single-unit design: no PTO-plus-extension combination. The clutch is located at the rear of the housing so the gear section sits tight against the transmission, keeping the overall package compact between the transmission and frame rail. The 890 Series accommodates transmissions fitted with or without a cooler or retarder. Typical applications include aerial trucks, fire and rescue apparatus, snow and ice equipment, and truck cranes 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.
