The Chelsea 912AHAD-AXXHC or 912AHADAXXHC is a 912 Series Split Shaft Power Take-Off gear box designed for Class 7 and 8 trucks equipped with automatic transmissions. Mounted between the transmission and rear axle, it drives auxiliary equipment via a driveline-driven gear box. The 912 Series features three 8-bolt PTO openings, accepting a wide range of 6-bolt, 8-bolt, PowerShift, and reversible Chelsea PTOs. Input and output connections include SPL-170, SPL-250, 1610, 1710, and 1810 Series flange options, as well as a no-flange configuration. Output is through a 2-3/4 inch 10-tooth spline. Air shift engagement, intermittent torque ratings above 501 lb-ft, and output power above 56 HP make this unit suited for pumper/cleaner, fire and rescue, and tire service vehicle applications. Call us to confirm proper fit for your application.
Features
912 Series split shaft gear box mounts between transmission and rear axle
Three 8-bolt openings accept 6-bolt, 8-bolt, PowerShift, and reversible Chelsea PTOs
Output shaft: 2-3/4 inch 10-tooth spline
Six input/output options including SPL-170, SPL-250, 1610, 1710, 1810 Series flanges, and no-flange
Air shift engagement
Intermittent torque above 501 lb-ft; output power above 56 HP
Tech Specs
- Mounting Type: Split Shaft, mounts between transmission and rear axle
- Output Shaft: 2-3/4 inch, 10-tooth spline
- PTO Openings: Three 8-bolt openings
- Flange Options: SPL-170, SPL-250, 1610, 1710, 1810 Series, or no-flange
- Shift Type: Air shift
- Intermittent Torque: 501+ lb-ft / 501+ Nm (series rating)
- Output Power: 56+ HP / 51+ kW (series rating)
- Compatible Transmission Type: Automatic
- Vehicle Class: Class 7 and Class 8 trucks
Additional Information
The 912 Series can be mounted in reverse, allowing the vehicle to be creep-driven back through the split shaft unit. This makes it a practical solution for rear-of-vehicle driven equipment layouts and applications requiring more than one piece of simultaneously driven auxiliary equipment. Typical markets include oil and gas, fire and rescue, pumper/cleaner trucks, and tire service vehicles. Parker Chelsea publishes a dedicated owner's manual (912 Series Owner's Manual) and parts list (HY25-2912-M1_US) for this series, available through Parker's documentation resources.Parts Manual: Chelsea 912 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
