The Chelsea 489 Series Power Take-Off Assembly, part number 489XSAHX-A3AF or 489XSAHXA3AF, is an air shift PTO built around a one-piece cast iron housing that mounts directly to an 8-bolt transmission opening on compatible Eaton/Fuller, Volvo/Mack, and other manual transmissions. The integral housing eliminates the need for a separate adapter plate, reducing potential leak paths. Output is delivered through an SAE B 2 or 4-bolt flange with a 1" 15-tooth SAE BB shaft; the 489 Series is rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM, with an intermittent torque rating of 201-300 lb-ft for the series. Tapered bearings replace needle bearings for greater load capacity. Internal components are common with the Chelsea 442 Series, keeping service parts familiar. Call us to confirm proper fit for your specific transmission and application.
Features
8-bolt one-piece cast iron housing mounts directly to transmission opening without an adapter plate
Air shift with electric-over-air shift option available in the series
Output: SAE B 2 or 4-bolt flange with a 1" 15-tooth SAE BB shaft
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Intermittent torque rating: 201-300 lb-ft (series rating; check application pages for confirmed values)
Internal parts common to Chelsea 442 Series for simplified service
Tech Specs
- Product Series: 489
- Mounting Type: 8-Bolt (direct to transmission, no adapter plate required)
- Mounting Option: Standard Mount (X)
- Gear Ratio Code: S (24/22)
- Input Gear Designator: AH
- Lube Option: No Pressure Lube (X)
- Shift Option: Air Shift (A)
- Assembly Arrangement: 3
- Output Option: SAE B 2 or 4-Bolt Flange, SAE BB Shaft (1" 15T) (AF)
- Output Power: 46-55 HP / 31-40 kW
- Shaft Power: 24 HP (500 RPM), 48 HP (1,000 RPM) / 18 kW (500 RPM), 36 kW (1,000 RPM)
- Intermittent Torque: 201-300 lb-ft / 301-400 Nm (check application pages for confirmed torque ratings)
- Continuous Torque: De-rate intermittent rating by 30% (check application pages for confirmed values)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, and other manual transmissions with 8-bolt PTO opening
Additional Information
Equivalent PTOs:
Matched by full model number. Check the mounting, input gear and output against the unit you are replacing before you order. Look up any Chelsea, Muncie or Bezares number on our Muncie to Chelsea PTO cross reference.
