The Chelsea 890 Series Power Take-Off, part number 890RCFJW-D5XY or 890RCFJWD5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. Its 10-bolt mounting positions the SAE C output flange at the rear of the transmission, pushing the pump rearward to clear the frame rail without extensions or adapters. The main shaft is a single one-piece design, eliminating inter-unit input splines and relocating the clutch pack toward the rear to keep the housing tight against the transmission. Wet-spline output technology reduces wear on pump shaft splines in continuous-duty service. Continuous torque reaches 670 ft-lb, with intermittent ratings above 501 ft-lb. Shaft power output runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via FJ input gear designation
Hydraulic PowerShift (hot-shift) engagement for shifting under load
10-Bolt mounting with SAE C outlet flange and SAE C (XS) output shaft
Single one-piece main shaft eliminates inter-unit input splines for added rigidity
Wet-spline output extends PTO and pump shaft life in high-demand service
Continuous torque rated to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
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)
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (check application pages for actual torque rating)
- 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
The 890 Series mounts like a standard side-mount PTO but adds a rear-of-transmission support bracket for stability. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission, creating clearance between the pump and the frame rail without a separate extension unit. The design accommodates Allison transmissions equipped with or without a cooler, retarder, or both. Typical applications include aerial lift trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice control equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
