The Chelsea 890 Series Power Take-Off, part number 890HBFJW-D5XS or 890HBFJWD5XS, 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 the pump farther back for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates input splines between the PTO and output extension, placing the clutch at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline output technology reduces wear on both the PTO and pump shaft under demanding duty cycles. Continuous torque rating reaches 670 lb-ft; shaft power is rated at 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 transmission configuration.
Features
Hydraulic PowerShift (hot shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with an additional rear bracket for added support
SAE C (XS) output flange positions pump to the rear of the transmission for improved clearance
One-piece main shaft eliminates input splines between PTO and output extension
Wet-spline output extends PTO and pump shaft life under high-demand conditions
Continuous torque rating up to 670 lb-ft; 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 (Hydraulic Hot Shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Output
- Lubricant Type: 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
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
