The Chelsea 897PAFJW-M5XY is a constant-mesh power take-off from the 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mounting design positions the SAE C pump output flange at the rear of the transmission, moving the PTO/pump interface rearward to free up clearance between the housing and the frame rail. The main shaft is a single-piece design, which eliminates the input splines found in two-piece PTO-plus-extension configurations. The wet-spline output lubricates the pump shaft interface to extend service life under demanding duty cycles. The 897 Series delivers intermittent torque ratings above 501 lb-ft and output power above 56 HP at the series level. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Constant-mesh engagement designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting with SAE C outlet flange and SAE C output shaft type
Rear-of-transmission pump flange location improves clearance between housing and frame rail
Wet-spline output extends PTO and pump shaft life in high-demand applications
Single one-piece main shaft eliminates input splines between PTO body and output extension
Series intermittent torque rating: 501+ lb-ft; output power: 56+ HP
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh (Constant Engagement)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- Input Gear Designator: FJ - Allison World Transmissions
- Intermittent Torque (Series): 501+ lb-ft / 501+ Nm
- Output Power (Series): 56+ HP / 51+ kW
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series fits neatly between the transmission and the frame rail, accommodating transmissions equipped with or without a cooler or retarder. It is compatible with both cooler-equipped and retarder-equipped Allison 3000/4000 platforms. Because it is a single integrated unit rather than a PTO paired with a separate output extension, the 897 Series keeps overall installation length tighter than comparable two-piece setups. The part number 897PAFJW-M5XY is also referenced as SP897PAFJW-M5XY in some catalog systems. Pro Gear and Transmission carries this genuine Chelsea part - call us to verify compatibility with your transmission variant before ordering.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
