524XMACX-F-XY Chelsea 524 Series Rear Mount PTO Assembly

The Chelsea 524 Series rear mount power take-off assembly, part number 524XMACX-F-XY or 524XMACXFXY, is engineered for ZF Astronic transmission applications. This PTO mounts to the rear aperture of compatible transmissions, helping eliminate clearance issues that front- or side-mount configurations can create. The 524 Series two-gear design offers three speed ratios and a compact housing. Shift is pneumatic, with six shift options integrated directly into the housing for a space-saving layout. Output flanges accept direct-mount pump attachment. The series is rated for intermittent torque up to 407 lb-ft and output power from 49 to 57 HP at 100 RPM output shaft speed. Output shaft type is DIN 5462. Call us to confirm proper fitment for your transmission and application.

Features

Rear mount design uses transmission rear aperture to reduce clearance conflicts
Pneumatic shift with six shift options integrated into the PTO housing
Three available gear ratios to match application requirements
DIN 5462 output shaft with direct-mount pump output flanges
Intermittent torque rating up to 407 lb-ft at series level
Compatible with ZF Astronic transmissions; input adapters also available for Mack mDrive, Volvo I-Shift, and Eaton Endurant

Tech Specs

• Mounting Type: Rear Mount
• Shift Type: Pneumatic
• Output Shaft Type: DIN 5462
• Gear Design: Two-gear, three speed ratios
• Intermittent Torque (Series): Up to 407 lb-ft
• Continuous Torque: De-rate 30% from intermittent rating
• Output Power (Series): 49 to 57 HP at 100 RPM output shaft
• Transmission Fitment: ZF Astronic (input adapters available for Mack mDrive, Volvo I-Shift, Eaton Endurant)
• Shift Options: Six, integrated into housing

Additional Information

The Chelsea 524 Series rear mount PTO uses the rear mount aperture available on select transmissions to help resolve clearance issues common in crowded drivetrain installations. Six shift options are built into the PTO housing itself, eliminating the need for external shift components and saving space. Two direct-mount pump output flanges are included. The compact two-gear design supports three speed ratios, and the series-level intermittent torque rating reaches 407 lb-ft. Input adapters for ZF Astronic, Mack mDrive, Volvo I-Shift, and Eaton Endurant transmissions extend the 524 Series to a broad range of modern vocational truck platforms. Typical applications include aerial, fire, refuse, tippers, and sewer and sanitation equipment. Part number 524XMACX-F-XY or 524XMACXFXY. Contact Pro Gear and Transmission to confirm this assembly fits your specific transmission and pump configuration.