The Chelsea 890 Series Power Take-Off, part number 890HBFJW-E5XK or 890HBFJWE5XK, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers an SAE C ("XS") output with wet-spline technology to extend PTO and pump shaft life under demanding duty cycles. Continuous-duty torque reaches 670 lb-ft, with intermittent torque rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series moves the pump mounting flange to the rear of the transmission, improving clearance between the pump and the frame rail. The one-piece main shaft eliminates input splines between the PTO and output extension. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Hydraulic PowerShift (hot shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with SAE C ("XS") outlet flange
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet-spline output extends PTO and pump shaft life in high-demand applications
One-piece main shaft and rear-mounted clutch move pump output rearward for improved clearance between pump and frame rail
Tech Specs
- Transmission Application: Allison 3000 MD Series 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: 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
The Chelsea 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. Its one-piece main shaft eliminates the input splines found between a conventional PTO body and an output extension, reducing potential wear points. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit flush against the transmission for tighter clearance. An additional support bracket mounts at the rear of the transmission. This design is particularly suited to aerial trucks, fire and rescue apparatus, snow and ice equipment, refuse trucks, and truck cranes where pump space is limited and high continuous torque is required. The 890 Series accommodates transmissions equipped with or without a cooler, retarder, or both. The part number SP890HBFJW-E5XK is also used as a reference number for this unit. Contact Pro Gear and Transmission to confirm the correct configuration for your transmission and pump combination.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
