The Chelsea 489 Series Power Take-Off, part number 489XFAHX-S3XR or 489XFAHXS3XR, is an air shift PTO built for 8-bolt manual transmission openings on vehicles such as Eaton Fuller, Mack, and Tremec gearboxes. The one-piece cast-iron housing bolts directly to the 8-bolt aperture, eliminating the adapter plate and its associated leak path. The series carries an intermittent torque rating of 201-300 lb-ft and delivers shaft power of 24 HP at 500 RPM and 48 HP at 1,000 RPM. Output is through a Chelsea Special (Cloverleaf) flange with a 7/8" 13-tooth SAE B shaft. Strong tapered bearings replace needle bearings for improved load-bearing capacity. Chelsea internal parts are common to the 442 Series, simplifying service. Call us to confirm proper fit for your specific transmission.
Features
8-bolt one-piece cast-iron housing mounts directly to transmission opening, no adapter plate required
Air shift with a PTO/dump pump combo valve
Chelsea Special (Cloverleaf) flange with a 7/8" 13-tooth SAE B shaft
Intermittent torque rating: 201-300 lb-ft (301-400 Nm)
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Tapered bearings for greater load-bearing capability versus needle-bearing designs
Internal parts common to Chelsea 442 Series for easier service
Tech Specs
- Mounting Type: 8-Bolt
- Mounting Option: Standard Mount (X)
- Gear Ratio Code: F (21/37)
- Input Gear Designator: AH
- Lube Option: No Pressure Lube (X)
- Shift Option: Air Shift with PTO/Dump Pump Combo Valve (with Kick-Out, with Neutral Spring Return) (S)
- Assembly Arrangement: 3
- Output Option: Chelsea Special (Cloverleaf) Flange, SAE B Shaft (7/8" 13T) (XR)
- Intermittent Torque: 201-300 lb-ft (301-400 Nm)
- Shaft Power: 24 HP (500 RPM), 48 HP (1,000 RPM), 18 kW (500 RPM), 36 kW (1,000 RPM)
- Output Power: 46-55 HP (31-40 kW)
- Product Series: 489
- Dimensions (H x W x L): 8 in. x 10 in. x 14 in.
Additional Information
The Chelsea 489 Series PTO is suited for utility trucks, dump trucks and trailers, snow and ice removal equipment, and fire and rescue vehicles. The series supports twenty-seven output options, including Chelsea's 360-degree rotatable flange with a greaseable shaft to reduce pump shaft spline fretting and corrosion. Eleven internal speed ratios and shift options are available across the 489 Series, making it adaptable to a wide range of vocational and municipal equipment. An electric-over-air shift option is also offered within the series. Internal components are shared with the Chelsea 442 Series, so technicians already familiar with that platform will find service straightforward. Parker service documentation includes the 489 Series Parts List (HY25-2442-M1_US) and the Chelsea Service Manual (HY25-6489-M1/US).Parts manual and diagrams: Chelsea 489 Series PTO parts list with prices
