The Chelsea 890 Series Power Take-Off, part number 890LBFJW-B5ZS or 890LBFJWB5ZS, is a hydraulic hot shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mount and delivers up to 670 lb-ft continuous torque with an intermittent rating exceeding 501 lb-ft. The SAE C (XS) output shaft uses Wet Spline technology to extend pump shaft life under demanding conditions. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The one-piece main shaft eliminates input splines between the PTO and output extension, and the rear-mounted clutch positions the pump output behind the transmission for improved clearance between the unit and the frame rail. Common applications include aerial trucks, fire and rescue trucks, snow and ice equipment, and refuse trucks. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot shift) engagement
SAE C (XS) output shaft with Wet Spline technology for extended pump shaft life
Continuous-duty torque rating up to 670 lb-ft; intermittent rating exceeds 501 lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with rear-mounted clutch positions pump output behind the transmission for improved frame rail clearance
Tech Specs
- Transmission: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot Shift)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Lubricant: 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
The Chelsea 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. The housing and gear section tuck tightly against the transmission while the clutch and pump output are located at the rear, creating space between the unit and the frame rail. This design is well suited to aerial equipment, fire and rescue trucks, refuse trucks, and truck cranes where pump space is limited and torque demands are high. The 890 Series can be configured for transmissions equipped with a cooler, a retarder, both, or neither.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
