The Chelsea 489 Series Power Take-Off Assembly, part number 489XCAHX-M3XQ or 489XCAHXM3XQ, is a constant mesh PTO built for 8-bolt manual transmission openings on Eaton/Fuller, Volvo/Mack, and other compatible transmissions. Its one-piece cast iron housing bolts directly to the 8-bolt aperture, eliminating the adapter plate that creates an added leak path. The 489 Series delivers 250 lb-ft intermittent torque - the same capacity as the 442 Series - with tapered bearings in place of needle bearings for improved load-bearing capability. Output is an SAE B 2 or 4-bolt flange with a 7/8" 13-tooth SAE B shaft. Shaft power is rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. Internal parts are common to the Chelsea 442 Series, simplifying service. Call us to confirm proper fit for your transmission and application.
The Chelsea 489 Series is suited for utility trucks, dump truck and trailer applications, snow and ice removal equipment, and fire and rescue vehicles. Eleven internal speed ratios and shift options are available across the 489 Series, along with 27 output configurations including Chelsea's 360-degree rotatable flange. The kit-style design and parts commonality with the 442 Series make field service straightforward. Compatible transmission manufacturers include Eaton/Fuller, Volvo/Mack, Tremec, and other manual transmissions equipped with an 8-bolt PTO opening.
Features
8-bolt one-piece cast iron housing mounts directly to transmission opening - no adapter plate required
Constant mesh (no shifter)
250 lb-ft intermittent torque capacity, matching the Chelsea 442 Series
Tapered bearings replace needle bearings for greater load-bearing capability
SAE B 2 or 4-bolt flange output, rotated 90 degrees, with a 7/8" 13-tooth SAE B shaft
Internal parts common to the 442 Series simplify parts sourcing and service
Tech Specs
- Product Series: 489
- Mounting Type: 8-Bolt (direct to transmission, no adapter plate)
- Mounting Option: Standard Mount (X)
- Gear Ratio Code: C (17/37)
- Input Gear Designator: AH
- Lube Option: No Pressure Lube (X)
- Shift Option: Constant Mesh (M)
- Assembly Arrangement: 3
- Output Option: SAE B 2 or 4-Bolt Flange, SAE B Shaft (7/8" 13T), Rotated 90 Degrees (XQ)
- Intermittent Torque: 250 lb-ft / 339 Nm (check application pages for actual torque ratings)
- 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 (500 RPM), 48 HP (1,000 RPM) / 18 kW (500 RPM), 36 kW (1,000 RPM)
- Transmission Compatibility: Eaton/Fuller, Volvo/Mack, and other manual transmissions with 8-bolt PTO aperture
Additional Information
The Chelsea 489 Series is suited for utility trucks, dump truck and trailer applications, snow and ice removal equipment, and fire and rescue vehicles. Eleven internal speed ratios and shift options are available across the 489 Series, along with 27 output configurations including Chelsea's 360-degree rotatable flange. The kit-style design and parts commonality with the 442 Series make field service straightforward. Compatible transmission manufacturers include Eaton/Fuller, Volvo/Mack, Tremec, and other manual transmissions equipped with an 8-bolt PTO opening.
