The Chelsea 892 Series Power Take-Off, part number 892HAFJW-B5AZ or 892HAFJWB5AZ, is a hydraulic PowerShift PTO engineered specifically for Allison 4700 Series transmissions. The 10-bolt mount locates the SAE C output flange at the rear of the transmission, positioning the pump behind the unit to gain clearance between the transmission and the frame rail. The one-piece main shaft eliminates input splines between the PTO and the output extension. Wet Spline output lubrication extends pump shaft service life in demanding applications. Continuous torque rating reaches 670 ft-lbs, with shaft power of 128 HP at 1,000 RPM. Fits Allison 3000 MD and 4000 HD series as well, per the FJ input gear designator. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
The Chelsea 892 Series is a single-unit PTO, not a PTO with a separate extension. The clutch is positioned at the rear of the housing, allowing the gear section to sit tightly against the transmission for maximum clearance. The 892 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both. Typical market segments include aerial, fire and rescue, defense, on-highway, and other mobile equipment applications.
Features
10-Bolt mounting for Allison 4700 Series transmissions; also fits Allison 3000 MD and 4000 HD Series (FJ input gear designator)
Hydraulic PowerShift (hot shift) operation
SAE C outlet flange with SAE C (XS) extended output shaft for improved pump clearance
Wet Spline output lubrication to extend PTO and pump shaft life
Continuous torque rating up to 670 ft-lbs (908 Nm); intermittent torque rated 501+ ft-lbs
Shaft power output: 64 HP (48 kW) at 500 RPM, 128 HP (95 kW) at 1,000 RPM
Tech Specs
- Product Series: 892
- Transmission Fit: Allison 4700 Series; also Allison 3000 MD and 4000 HD Series (FJ input gear designator)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Extended Output
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lbs (908 Nm) - check application pages for actual torque ratings
- Intermittent Torque: 501+ ft-lbs (501+ Nm)
- 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, not a PTO with a separate extension. The clutch is positioned at the rear of the housing, allowing the gear section to sit tightly against the transmission for maximum clearance. The 892 Series can be configured for transmissions equipped with or without a cooler, a retarder, or both. Typical market segments include aerial, fire and rescue, defense, on-highway, and other mobile equipment applications.
Parts Manual: Chelsea 892 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
