The Chelsea 890 Series Power Take-Off, part number 890UEFJW-B5XS or 890UEFJWB5XS, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump output flange at the rear of the transmission, placing the SAE C output shaft farther back to create better clearance for the hydraulic pump. The one-piece main shaft eliminates the inter-unit input splines found on conventional PTO-plus-extension configurations. Wet spline lubrication protects the output shaft under demanding duty cycles. Continuous-duty torque is rated at 670 ft-lbs, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical service areas include aerial trucks, fire and rescue, refuse, and crane applications. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift engagement for hot-shift operation
SAE C (XS) extended output shaft relocates pump flange rearward for improved pump clearance
One-piece main shaft design eliminates input splines between PTO body and output extension
Wet spline output lubrication extends PTO and pump shaft life in high-demand service
Continuous-duty torque rating up to 670 ft-lbs; shaft power 64 HP at 500 RPM and 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) Extended Output
- Lubricant / Spline Type: Wet Spline
- Continuous Torque: 670 lb-ft (see application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Shaft Power: 64 HP at 500 RPM; 128 HP at 1,000 RPM
- Output Power: 56+ HP
Additional Information
The 890 Series mounts like a standard side-mounted PTO but adds a rear bracket at the back of the transmission for additional support. The clutch is located at the rear of the PTO housing, allowing the gear section to sit close to the transmission and maximizing available frame-rail clearance. This series is built as a single unit, not a PTO paired with a bolt-on extension, which reduces potential leak points and simplifies installation. Compatible with Allison 3000/4000 transmissions equipped with or without a cooler, a retarder, or both. Common applications include aerial lift trucks, pumper-cleaner units, truck cranes, refuse trucks, and fire and rescue vehicles.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
