281GDKVP-D3RY Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GDKVP-D3RY or 281GDKVPD3RY, is a hydraulically shifted hot-shift PTO designed for 10-bolt aperture automatic transmissions, including Allison and Caterpillar units. It is an evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load, and an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. The series carries a continuous torque rating of 390 lb-ft. Sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.

Features

Chelsea 281 Series hydraulic hot-shift (PowerShift) PTO for 10-bolt automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and reduces vibrational effects
Clutch pack steel discs are 80% thicker to resist premature tooth wear
Nine speed ratios, including low and high-speed options
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart feature reduces shock load at start-up for applicable configurations
Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast-iron flanges reduce interference and improve pump clearance
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Hose included - no separate order required

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic)
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
• Continuous Operation: Yes
• Transmission Compatibility: Allison and Caterpillar automatic transmissions
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Output Shaft Options: 3/4" 11T Pump Spline, SAE B 7/8" 13T Pump Spline, SAE C 1-1/4" 14T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange, SmartStart Round Shaft 1-1/4" with 5/16" Key
• Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
• Lubrication: Pressure Lube (P) or Wet Spline (W) options
• Speed Ratios: Nine, including low and high-speed
• Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse

Additional Information

Reference documents: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner's Manual; Chelsea PTO Stud Kits (HY25-2002-M1_US).

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.