489ZFDAX-A3RB Chelsea 489 Series PTO Assembly

The Chelsea 489 Series Power Take-Off Assembly, part number 489ZFDAX-A3RB or 489ZFDAXA3RB, is an air shift PTO built for 8-bolt manual transmission openings. Its one-piece cast iron housing mounts directly to the transmission without an adapter plate, eliminating a common leak path. The 489 Series delivers up to 250 lb-ft intermittent torque and 48 HP at 1,000 RPM. Tapered bearings replace needle bearings for greater load capacity. Internal components are shared with the Chelsea 442 Series, and the kit-style design simplifies service. Compatible with Eaton/Fuller, Volvo/Mack, and other manual transmissions. Call us to confirm proper fit for your application.

Features

Air shift
8-bolt one-piece cast iron housing mounts directly to transmission, no adapter plate required
250 lb-ft intermittent torque capacity; 48 HP at 1,000 RPM shaft power
7/8" 13-tooth SAE B output shaft on a rotatable SAE B 4-bolt flange
Tapered bearings for increased load-bearing capability over needle-bearing designs
Kit-style construction with internal parts common to the Chelsea 442 Series for simplified service

Tech Specs

• Product Series: 489
• Mounting Type: 8-Bolt
• Mounting Option: Deep Mount (Z)
• Gear Ratio Code: F (21/37)
• Input Gear Designator: DA
• Lube Option: No Pressure Lube (X)
• Shift Option: Air Shift (A)
• Assembly Arrangement: 3
• Output Option: Rotatable SAE B 4-Bolt Flange, SAE B Shaft (7/8" 13T) (RB)
• Intermittent Torque: 250 lb-ft (339 Nm) - Check Application Pages for Actual Torque Ratings
• Output Power: 46-55 HP (31-40 kW)
• Shaft Power: 24 HP (18 kW) at 500 RPM; 48 HP (36 kW) at 1,000 RPM
• Transmission Compatibility: Eaton/Fuller, Volvo/Mack, and other manual transmissions with 8-bolt PTO opening

Additional Information

Parts manual and diagrams: Chelsea 489 Series PTO parts list with prices