The Chelsea 890 Series Power Take-Off, part number 890HBFJW-G5AF or 890HBFJWG5AF, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt flange and delivers an SAE C ("XS") output shaft with wet-spline lubrication to protect pump shaft splines under continuous demand. The 890 Series positions the pump mounting flange at the rear of the transmission, clearing the frame rail where conventional side-mount PTOs run short on space. Continuous torque reaches 670 lb-ft; intermittent torque is rated at 501 lb-ft and above. Shaft power measures 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 fit for your specific chassis and transmission configuration.
Features
Hydraulic PowerShift (hot-shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with an additional rear-of-transmission support bracket for rigid installation
SAE C ("XS") output shaft with wet-spline lubrication to extend PTO and pump shaft service life
Continuous-duty torque rating up to 670 lb-ft; intermittent torque rated 501 lb-ft and above
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-positioned pump mounting flange improves pump clearance between transmission and frame rail
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") Wet-Spline Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 lb-ft (check application pages for actual rating)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM) | 48 kW (500 RPM), 95 kW (1,000 RPM)
- Lubricant: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
