Chelsea part number 897HAFJW-M5AZ or 897HAFJWM5AZ is a 897 Series constant-engagement power take-off assembly designed for Allison 3000 and 4000 Series transmissions. The 10-bolt mount positions the SAE C output flange at the rear of the transmission, tucking the housing tightly against the transmission to clear frame rails while pushing the pump interface rearward for adequate working space. The one-piece main shaft eliminates input splines between the PTO body and the output extension, a design that reduces wear points. Wet Spline output technology extends PTO and pump shaft life in demanding duty cycles. Continuous-duty torque capacity reaches 670 ft-lb (908 Nm); shaft power at 1,000 RPM is 128 HP (95 kW). Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison installation.
Features
10-bolt mount for Allison 3000 and 4000 Series transmissions
Constant-engagement (constant mesh) shift type, no clutch required for engagement
SAE C outlet flange and SAE C (XS) output shaft configuration
One-piece main shaft eliminates input splines between PTO and output extension
Wet Spline output extends PTO and pump shaft service life
Continuous-duty torque rating: 670 ft-lb (908 Nm); shaft power 128 HP at 1,000 RPM
Tech Specs
- Transmission Fitment: Allison 3000 and 4000 Series
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh (Constant Engagement)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS extended shaft)
- Lubricant Interface: Wet Spline
- Intermittent Torque: 501+ ft-lb (501+ Nm)
- Continuous Torque: 670 ft-lb (908 Nm) - see application pages for actual torque ratings
- Output Power: 56+ HP (51+ kW)
- Shaft Power at 500 RPM: 64 HP (48 kW)
- Shaft Power at 1,000 RPM: 128 HP (95 kW)
Additional Information
