The Chelsea 897XAFJW-M5AZ or 897XAFJWM5AZ is a constant-mesh power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series design relocates the PTO and pump mounting flange to the rear of the transmission, tucking the housing tightly against the transmission to improve clearance between the pump and the frame rail. This is a single-unit PTO with a one-piece main shaft, eliminating input splines between the PTO body and the output extension. The output uses Chelsea Wet Spline Technology to extend service life under demanding conditions. Mounting is 10-bolt with an SAE C outlet flange and SAE C output shaft. Intermittent torque rating for the 897 Series reaches 501 ft-lb and above. Call us to confirm proper fit for your specific Allison application.
Features
Chelsea 897 Series constant-mesh (constant engagement) PTO
Designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting with SAE C outlet flange and SAE C output shaft
Pump flange relocated to rear of transmission for improved clearance
One-piece main shaft eliminates input splines between PTO and output extension
Wet Spline output for extended PTO and pump shaft life in demanding service
Tech Specs
- Series: Chelsea 897
- Part Number: 897XAFJW-M5AZ or 897XAFJWM5AZ
- Shift Type: Constant Mesh / Constant Engagement
- Transmission Fit: Allison 3000 Series, Allison 4000 Series
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Lubrication: Wet Spline
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Input Gear Designator: FJ (Allison World Transmissions)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series is a single-unit constant-mesh PTO, not a PTO-with-extension configuration. The housing and gear section mount like a standard side-mounted PTO but include an additional bracket at the rear of the transmission for support. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment. The series accommodates Allison transmissions configured with or without a cooler or retarder.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
