The Chelsea 892 Series Power Take-Off 892HDFJW-B5AF or 892HDFJWB5AF is a hydraulic PowerShift PTO engineered for Allison 3000 MD and 4000 HD Series transmissions, including the Allison 4700. The 10-bolt mounting configuration locates the SAE C output flange at the rear of the transmission, positioning the pump away from the frame rail for improved clearance without relying on a PTO-plus-extension assembly. The main shaft is a single-piece design that eliminates intermediate input splines between the PTO body and the output. Continuous-duty torque reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Wet-spline output technology reduces wear on mating pump shaft splines in demanding cycles. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your transmission configuration.
The Chelsea 892 Series is a single-unit PTO - it is not a standard PTO paired with a bolt-on extension. The one-piece main shaft eliminates the splined interface between the PTO body and the output section, which is a common wear point in multi-piece designs. The clutch is positioned at the rear of the PTO housing so the gear section sits flush against the transmission for tighter packaging. The unit mounts like a conventional side-mounted PTO but includes an additional support bracket at the rear of the transmission. It is compatible with Allison 4700 configurations equipped with or without a cooler, retarder, or both. Typical applications include aerial work platforms, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice control equipment.
Features
Hydraulic PowerShift operation via 10-bolt mount on Allison 3000 MD and 4000 HD Series transmissions
SAE C output flange with extended single-piece shaft positions pump to the rear of the transmission for improved clearance
Wet-spline output extends PTO and pump shaft life in high-demand duty cycles
Continuous-duty torque rating up to 670 ft-lb; intermittent torque rated at 501+ ft-lb
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Single-unit design - no separate extension required; clutch located at rear of PTO housing
Tech Specs
- Transmission Compatibility: Allison 3000 MD and 4000 HD Series (including 4700)
- Product Series: 892
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS Extended Shaft)
- Lubricant/Spline Interface: Wet Spline
- Intermittent Torque: 501+ ft-lb, 501+ Nm
- Continuous Torque: 670 ft-lb (verify against application pages for actual rating)
- 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
- Assembly: 5
Additional Information
The Chelsea 892 Series is a single-unit PTO - it is not a standard PTO paired with a bolt-on extension. The one-piece main shaft eliminates the splined interface between the PTO body and the output section, which is a common wear point in multi-piece designs. The clutch is positioned at the rear of the PTO housing so the gear section sits flush against the transmission for tighter packaging. The unit mounts like a conventional side-mounted PTO but includes an additional support bracket at the rear of the transmission. It is compatible with Allison 4700 configurations equipped with or without a cooler, retarder, or both. Typical applications include aerial work platforms, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice control equipment.
Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
