The Chelsea 489GFAHX-A3RB or 489GFAHXA3RB is a 489 Series Power Take-Off assembly built for manual transmissions with an 8-bolt PTO mounting opening, including Eaton/Fuller, Volvo/Mack, and Tremec applications. The one-piece cast iron housing bolts directly to the transmission without an adapter plate, which removes one potential leak path compared to older two-piece designs. Shift is wire/cable mechanical. The 1-1/4" round output shaft is available with keyway. Intermittent torque rating for the 489 Series is 201-300 lb-ft (301-400 Nm); shaft power runs 24 HP at 500 RPM and 48 HP at 1,000 RPM. Tapered bearings replace needle bearings for greater load capacity. Internal components are common with the 442 Series, simplifying parts inventory. Call us to confirm proper fit for your transmission and application.
The Chelsea 489GFAHX-A3RB is a 2-gear PTO assembly. Cross-references for this part include 1450-489GFAHXA3RB and 1450489GFAHXA3RB. Typical applications within the 489 Series include utility trucks, dump trucks, snow and ice removal equipment, and fire and rescue vehicles. The 489 Series is supported by Parker Chelsea service manual HY25-6489-M1/US and parts list HY25-2442-M1_US. Contact Pro Gear and Transmission to verify fitment for your specific transmission and PTO mounting configuration.
Features
489 Series, 8-bolt one-piece cast iron housing mounts directly to transmission without an adapter plate
Wire/cable mechanical shift; electric-over-air shift option available
1-1/4" round output shaft with keyway option
Intermittent torque: 201-300 lb-ft (301-400 Nm); shaft power 24 HP at 500 RPM, 48 HP at 1,000 RPM
Tapered bearings for increased load-bearing capacity over needle-bearing designs
Kit-style construction and internal parts shared with 442 Series simplify service and parts stocking
Tech Specs
- Product Series: 489
- Mounting Type: 8-Bolt (one-piece cast iron housing, no adapter plate required)
- Shift Type: Wire/Cable Mechanical
- Output Shaft Type: 1-1/4" Round; 1-1/4" Round with Key
- Intermittent Torque: 201-300 lb-ft (301-400 Nm)
- Continuous Torque: De-rate intermittent rating by 30% (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
- Lubricant: X = No Pressure Lube; P = Pressure Lube
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, Tremec, and other 8-bolt manual transmissions
Additional Information
The Chelsea 489GFAHX-A3RB is a 2-gear PTO assembly. Cross-references for this part include 1450-489GFAHXA3RB and 1450489GFAHXA3RB. Typical applications within the 489 Series include utility trucks, dump trucks, snow and ice removal equipment, and fire and rescue vehicles. The 489 Series is supported by Parker Chelsea service manual HY25-6489-M1/US and parts list HY25-2442-M1_US. Contact Pro Gear and Transmission to verify fitment for your specific transmission and PTO mounting configuration.
