The Chelsea 890 Series Power Take-Off, part number 890LCFJW-B5XS or 890LCFJWB5XS, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts via a 10-bolt pattern, positions the SAE C output flange to the rear of the transmission, and fits between the transmission and the frame rail to keep pump clearance where demanding applications require it. The one-piece main shaft eliminates input splines between the PTO and the output extension, and the clutch is located at the rear of the housing so the gear section sits tight against the transmission. Continuous-duty torque is rated up to 670 lb-ft, with intermittent torque rated at 501+ lb-ft. Shaft power output reaches 128 HP at 1,000 RPM. Wet-spline lubrication protects PTO and pump shaft life in demanding service. Call us to confirm proper fit for your specific Allison application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) operation
SAE C (XS) output shaft positions pump to the rear of the transmission for improved clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Continuous-duty torque rating up to 670 lb-ft; intermittent torque rated 501+ lb-ft
Wet-spline output lubrication extends PTO and pump shaft life in severe-duty service
Tech Specs
- Transmission Application: 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) Extended Output
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power at 500 RPM: 64 HP (48 kW)
- Shaft Power at 1,000 RPM: 128 HP (95 kW)
- Lubrication: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO paired with a separate extension. The housing and gear section tuck tightly against the transmission body, while the clutch pack sits at the rear to allow the extended SAE C output shaft to reach behind the transmission for pump placement. This design is suited to applications including aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment, where both pump clearance and sustained high torque are critical. The 890 Series can be ordered for Allison transmissions equipped with or without a cooler or retarder, or both. Dimensions on record: 13 in. H x 11 in. W x 31 in. L. NMFC classification: 128520, hydraulic PTOs, pumps, and motors.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
