The Chelsea 897 Series Power Take-Off, part number 897HBFJW-M5ZS or 897HBFJWM5ZS, is a constant-engagement PTO engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series mounts via a 10-bolt pattern and relocates the pump mounting flange to the rear of the transmission, improving clearance in tight frame-rail installations. The output shaft is SAE C with Wet Spline lubrication to extend PTO and pump shaft life under demanding duty cycles. One-piece main shaft construction eliminates the inter-stage input splines found on extension-style units. The series is rated for intermittent torque above 501 lb-ft and output power above 56 HP, making it a common choice for aerial trucks, fire and rescue apparatus, refuse trucks, and truck crane applications. Pro Gear and Transmission carries this genuine Chelsea part. Call us to confirm proper fit for your application.
Features
Constant-mesh (constant engagement) shift type for uninterrupted power delivery
Designed for Allison 3000 and 4000 Series transmissions, 10-bolt mounting
Pump flange relocated to rear of transmission for improved pump and frame-rail clearance
SAE C output shaft with Wet Spline technology for extended PTO and pump shaft life
Single one-piece main shaft eliminates input splines between PTO and output extension
Intermittent torque rating above 501 lb-ft with output above 56 HP
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh (Constant Engagement)
- Transmission Fitment: Allison 3000 Series, Allison 4000 Series
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubrication: Wet Spline
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
