The Chelsea 897RFFJW-M5XY or 897RFFJWM5XY is a constant-engagement (constant mesh) Power Take-Off from the Chelsea 897 Series, purpose-built for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange at the rear of the transmission, moving the pump interface rearward for improved clearance between the pump and the frame rail. The single-piece main shaft eliminates the input splines found in PTO-plus-extension setups, and the wet spline output extends service life under demanding duty cycles. The 897 Series carries an intermittent torque rating above 501 lb-ft and output power above 56 HP at the series level, making it a common fit for aerial, fire and rescue, refuse, and truck crane applications. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 897 Series constant-engagement (constant mesh) Power Take-Off
10-bolt mounting, fits Allison 3000 and 4000 Series transmissions
SAE C outlet flange and output shaft type
Pump flange positioned at rear of transmission for improved pump clearance
Wet spline output technology extends PTO and pump shaft service life
Single-piece main shaft eliminates input splines between PTO and output extension
Tech Specs
- Product Series: 897
- Part Number: 897RFFJW-M5XY or 897RFFJWM5XY
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output Feature: Wet Spline
- 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.
- NMFC Code: 128520 - Hydraulic PTOs, Pumps, Motors
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
