The Chelsea 524 Series Power Take-Off Assembly, part number 524XTACX-H-XV or 524XTACXHXV, is a rear mount PTO designed to eliminate clearance issues by using the rear mount aperture available on certain transmissions. This unit features pneumatic shift with six shift options integrated directly into the housing, a compact two-gear design, and three available speed ratios. The ISO 7653 80mm x 80mm mount and dry spline output make it well-suited for vocational truck applications including refuse, aerial, fire, and sewer and sanitation equipment. Input adapter compatibility spans ZF Astronic transmissions per the ZFASTRONIC product designation. Call us to confirm proper fit for your application.

• Mounting Type: Rear Mount
• Mount Option: ISO 7653 80mm x 80mm
• Shift Type: Pneumatic
• Output Shaft Type: DIN 5462, 4-Bolt DIN 5462
• Lubricant/Spline: Dry Spline
• Transmission Compatibility: ZF Astronic (this part number); adapters available for Mack mDrive, Volvo I-Shift, Eaton Endurant
• Series Intermittent Torque Rating: 407 lb-ft (check application pages for actual torque ratings)
• Series Continuous Torque: De-rate torque rating 30% (check application pages for actual torque ratings)
• Series Output Power: 49 to 57 HP at 100 RPM output shaft
• Product Series: Chelsea 524

The Chelsea 524 Series Rear Mount PTO uses the rear mount aperture on compatible transmissions to help eliminate clearance issues common with side-mount installations. The compact housing integrates six shift options and supports two direct-mount pump output flanges, reducing external plumbing. A quick-assembly sealed bayonet connector is included for the indicator switch, simplifying installation and maintenance. The 524 Series is designed for vocational truck applications including fire and aerial apparatus, refuse, tippers, and sewer and sanitation equipment. Part number 524XTACX-H-XV or 524XTACXHXV is configured for ZF Astronic transmissions.