442ZHDAX-A4XK Chelsea PTO Assembly

The Chelsea 442 Series Power Take-Off Assembly, part number 442ZHDAX-A4XK or 442ZHDAXA4XK, is a 6-bolt mount PTO built for light-to-medium duty vocational applications including dump trucks, tow trucks, and service trucks. This unit runs an air shift mechanism, a 0.391:1 gear ratio, and delivers power through a 1-1/4" round standard output shaft. Mounting uses standard configuration with metric studs, and the unit carries no pressure lube requirement. The cast iron housing and tapered cone bearings on the output shaft are characteristic of the 442 Series, which offers eleven internal speed ratios and 36 output options across the line. Call us to confirm proper fit for your transmission application.

Features

Air shift activation for reliable, remote engagement
0.391:1 gear ratio for speed-appropriate power transfer
1-1/4" round standard output shaft
Standard 6-bolt mount with metric studs fits virtually all existing 6-bolt transmission applications
Cast iron housing with tapered cone bearings for extended service life
Greaseable output shaft and rotatable output flange for installation clearance flexibility

Tech Specs

• Product Series: 442
• Input Gear Designator: AH
• Gear Ratio: 0.391:1
• Mounting Option: Standard Mount with Metric Studs (6-Bolt)
• Shift Type: Air Shift
• Output Option: 1-1/4" Round Standard Shaft
• Assembly: 3
• Lubricant: No Pressure Lube

Additional Information

The Chelsea 442 Series is engineered for compatibility with virtually all 6-bolt transmission applications. Typical vocational uses include dump trucks, service trucks, tow and recovery trucks, and aerial equipment. The series supports 36 output configurations and eleven internal speed ratios, making it adaptable across a wide range of hydraulic pump and auxiliary equipment setups. The 442 Series intermittent torque range is 201-300 lb-ft (series-level rating; confirm actual torque against your specific application requirements). Output shaft power at the series level is rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. Relevant Parker Chelsea documentation includes the 442 Series Owner's Manual, 442 Series Parts List (HY25-2442-M1_US), and Chelsea Service Manual (HY25-6442-M1/US).