Description
The Chelsea 524 Series rear-mount PTO assembly, part number 524XTDAX-P-XK or 524XTDAXPXK, is designed specifically for Daimler DT12 transmission applications. This rear-mount unit uses the transmission’s rear aperture to help eliminate underbody clearance issues common in vocational truck installations. The 524 Series features a pneumatic shift mechanism, a compact two-gear housing with three available speed ratios, and ISO 7653 80mm x 80mm mounting with a dry-spline output configuration. Direct-mount pump output flanges are built into the housing, and a sealed bayonet connector simplifies indicator switch installation. Typical applications include fire apparatus, aerial lifts, refuse vehicles, tippers, and sewer and sanitation equipment. Call us to confirm proper fit for your specific chassis and transmission build.
Features
Rear-mount design uses transmission rear aperture to reduce clearance conflicts
Pneumatic shift with six shift options integrated into the PTO housing
ISO 7653 80mm x 80mm mount with dry-spline output configuration
Direct-mount pump output flanges built into the compact housing
Sealed bayonet connector for indicator switch – no loose fittings
Configured for Daimler DT12 transmission input adapter
Tech Specs
- Series: Chelsea 524
- Mounting Type: Rear Mount
- Shift Type: Pneumatic
- Mounting Option: ISO 7653 80mm x 80mm
- Output Shaft Type: DIN 5462 / 4-Bolt DIN 5462
- Lubricant/Spline: Dry Spline
- Transmission Application: Daimler DT12 (adapter)
- Series Intermittent Torque Rating: 407 lb-ft (series-level rating; verify actual rating for this application)
- Series Output Power: 49 to 57 HP at 100 RPM output shaft (series-level; verify actual for this application)
- Part Number: 524XTDAX-P-XK or 524XTDAXPXK
Additional Information
The Chelsea 524 Series rear-mount PTO was developed to address clearance constraints on modern vocational trucks. By mounting at the rear aperture of compatible transmissions, the unit keeps the overall drivetrain package compact. The 524 Series two-gear design offers three speed ratios, giving operators flexibility to match PTO output to hydraulic pump or accessory requirements. Input adapters are available across multiple transmission platforms including ZF, Mack mDrive, Volvo I-Shift, and Eaton Endurant in addition to the Daimler DT12 configuration of this unit. High-capacity bearings and a space-saving integrated shift housing reduce both installation time and long-term maintenance demands. Applications served by the 524 Series include fire, aerial, refuse, tippers, and sewer and sanitation equipment.
