The Chelsea 890 Series Power Take-Off, part number 890HFFJW-B5XV or 890HFFJWB5XV, 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 pump output flange to the rear of the transmission, tucking the housing and gear section tightly against the trans to free up frame-rail clearance. The output shaft is SAE C ("XS") type with wet-spline lubrication to extend both PTO and pump shaft service life under demanding duty cycles. The main shaft is a single one-piece design, eliminating the inter-unit input splines found in conventional PTO-plus-extension setups. Continuous-duty torque reaches 670 lb-ft, with intermittent torque rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your specific Allison transmission configuration.
The Chelsea 890 Series is suited for aerial trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment where both pump clearance and high continuous torque are priorities. The 890 Series mounts like a standard side-mounted PTO but adds a rear bracket for additional transmission support. It can be configured for transmissions with or without a cooler, retarder, or both - confirm your specific Allison build when ordering.
Interchanges:
- SP890HFFJW-B5XV
Features
Hydraulic PowerShift (hot-shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting pattern with rear-positioned pump flange for improved frame-rail clearance
SAE C ("XS") output shaft with wet-spline lubrication to reduce pump spline wear
Single one-piece main shaft eliminates input splines between PTO body and output extension
Continuous-duty torque rating: 670 lb-ft; intermittent torque: 501+ 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)
- Output Shaft Type: SAE C ("XS")
- Outlet Flange Type: SAE C
- Lubricant / Output: 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 (500 RPM), 128 HP (1,000 RPM)
Additional Information
The Chelsea 890 Series is suited for aerial trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment where both pump clearance and high continuous torque are priorities. The 890 Series mounts like a standard side-mounted PTO but adds a rear bracket for additional transmission support. It can be configured for transmissions with or without a cooler, retarder, or both - confirm your specific Allison build when ordering.
Parts manual and diagrams: Chelsea 890 Series PTO parts list with prices
