The Chelsea 899JDFJW-M3CS or 899JDFJWM3CS is a constant mesh power take-off from the Chelsea 899 Series, engineered specifically for Allison 4700 Series transmissions. The 10-bolt mounting configuration positions the SAE C pump flange at the rear of the transmission, improving clearance between the PTO housing and the frame rail. Output is through an SAE C 1-1/4 in. - 14-tooth wet spline shaft, which reduces wear on mating pump splines in demanding duty cycles. The one-piece main shaft eliminates input splines between the PTO body and output extension. Typical applications include aerial trucks, fire and rescue vehicles, truck cranes, and refuse trucks. Call us to confirm proper fit for your application.
Features
Chelsea 899 Series, designed for Allison 4700 Series transmissions
Constant mesh (non-shiftable) operation
10-bolt transmission mounting
SAE C outlet flange with 1-1/4 in. - 14-tooth wet spline output shaft
Wet spline technology extends pump shaft life in high-demand applications
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C - 1-1/4 in. 14-Tooth Pump Spline (Wet Spline)
- Series Intermittent Torque Rating: 501+ lb-ft
- Series Output Power: 56+ HP
- Transmission Application: Allison 4700 Series
Additional Information
The Chelsea 899 Series was purpose-built to solve pump clearance challenges on Allison 4700 Series transmissions. By relocating the PTO and pump mounting flange to the rear of the transmission, the 899 Series tucks the housing and gear section tightly to the transmission while still providing adequate working room for pump installation. The series supports configurations for transmissions equipped with or without a cooler or retarder. Common vocational uses include aerial work platforms, pumper cleaners, truck cranes, fire and rescue apparatus, and refuse trucks. The part number 899JDFJW-M3CS is also referenced as SP899JDFJW-M3CS. Not sure this is the right PTO for your truck? Give us a call.Parts Manual: Chelsea 899 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
