The Chelsea 890 Series Power Take-Off, part number 890NDFJW-B3CF or 890NDFJWB3CF, is a hydraulic hot-shift PTO built specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts with a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, moving the pump mounting point back for improved clearance between the pump and the frame rail. A one-piece main shaft eliminates input splines between the PTO and the output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline output technology extends PTO and pump shaft service life under demanding duty cycles. Continuous torque rating reaches 670 lb-ft, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Hydraulic PowerShift (hot-shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with additional rear-of-transmission support bracket
SAE C (XS) output shaft and outlet flange
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output extends PTO and pump shaft life in high-demand applications
Continuous torque rated to 670 lb-ft; 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 (hot-shift)
- 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 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 paired with a separate extension. The housing and gear section mount flush to the Allison transmission side like a standard side-mount PTO, while the clutch repositions to the rear of the unit to gain clearance. An additional bracket at the rear of the transmission provides structural support. The 890 Series accommodates Allison transmissions fitted with or without a cooler, a retarder, or both. Typical markets include aerial, fire and rescue, refuse, on-highway, defense, and other mobile hydraulic applications. Also referenced as part number SP890NDFJW-B3CF.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
