Parker Chelsea 590 Series Power Take-Off

Quick Facts

Manufacturer: Parker Hannifin — Chelsea Products Division
Product Series: Chelsea 590 Series
Product Type: Hydraulic PowerShift power take-off
Mounting Position: Rear transmission mount
Primary Transmission Type: Automatic transmissions with an approved rear-mount PTO provision
Primary Transmission Applications: Allison TC10 and application-specific Caterpillar CX Series transmissions
Gear Ratio: 1:1
Maximum Torque Rating: 650 lb-ft for intermittent and continuous operation
Power Rating at 500 Output RPM: 62 horsepower
Power Rating at 1,000 Output RPM: 124 horsepower
Shift System: 12- or 24-volt electric-over-hydraulic
Output Options: Six direct-pump and driveline configurations
Output Lubrication: Wet-spline direct-pump outputs
Approximate Weight: 50 pounds
Primary Applications: Fire and rescue, refuse, vacuum trucks, oil and gas equipment, hydro excavation, and other heavy-duty vocational systems

Overview

The Parker Chelsea 590 Series Power Take-Off is a heavy-duty hydraulic PowerShift PTO designed for automatic transmissions with an approved rear-mount provision. It transfers power from the rear of the transmission to a directly mounted hydraulic pump or remotely mounted auxiliary equipment.

Unlike a conventional side-mounted PTO, the 590 Series does not require the installer to establish gear backlash. Its rear-mount position can also provide improved clearance for large hydraulic pumps that may be difficult to package beside the transmission and frame.

The 590 Series carries a published torque rating of 650 lb-ft for both intermittent and continuous operation. It uses a 1:1 ratio and is available with 12- or 24-volt electric-over-hydraulic shifting.

Direct-pump output configurations use wet-spline lubrication to reduce fretting and wear between the PTO shaft and hydraulic-pump shaft. A 1410 Series companion-flange output is also available for applications that power remotely mounted equipment through an auxiliary driveline.

Key Characteristics

Hydraulic PowerShift PTO
Rear-mounted transmission design
Designed for approved automatic transmissions
No gear backlash to set
1:1 output ratio
650 lb-ft intermittent and continuous torque rating
Up to 124 horsepower at 1,000 output RPM
12- or 24-volt electric-over-hydraulic shifting
Six available output options
Wet-spline direct-pump outputs
SAE and ISO pump-mount configurations
1410 Series companion-flange driveline output
Improved clearance for large direct-mounted pumps
PTO-and-pump support bracket included
Heavy-duty vocational design

Major Components

Rear-mount PTO housing
Transmission input coupling
Internal gear and clutch assembly
Hydraulic shift piston
Hydraulic control valve
Electric shift solenoid
Output shaft
Wet-spline lubrication cavity
Output bearing assembly
Oil seals and O-rings
Direct-pump mounting flange
Optional 1410 Series companion flange
Transmission mounting hardware
PTO-and-pump support bracket
Electrical connector and wiring
Hydraulic pressure passages

Product Type and Construction

The Chelsea 590 is a rear-mounted hydraulic PowerShift PTO. It attaches to a compatible rear transmission provision rather than a traditional side PTO opening.

Its internal clutch allows the PTO to engage hydraulically after receiving an electrical command from the vehicle or equipment control system. The rear-mount architecture provides a direct power path and eliminates the external gear-backlash adjustment associated with many side-mounted PTOs.

The PTO is designed to support heavy-duty continuous and intermittent power requirements. Its pump outputs use wet-spline lubrication, while the available driveline configuration uses a 1410 Series companion flange for remotely mounted equipment.

How the Power Take-Off Works

The 590 Series connects to an approved rear-mount provision on the transmission. When the PTO control receives an authorized engagement command, the electric solenoid directs hydraulic pressure to the internal clutch assembly.

The clutch connects the transmission-driven input to the PTO output shaft. Because the 590 uses a 1:1 ratio, the relationship between the transmission PTO drive and output does not include an additional speed-increasing or speed-reducing gear ratio inside the PTO.

The output shaft then powers a directly mounted hydraulic pump or transfers power through a 1410 Series companion flange and auxiliary driveline. When the operator disengages the PTO, hydraulic pressure is released or redirected and the internal clutch disconnects the output.

Position and Function Within the Vehicle

The 590 Series mounts at the rear of a compatible automatic transmission. This location can provide greater clearance for large hydraulic pumps than a side-mounted installation, especially where frame rails, exhaust components, fuel tanks, or other chassis equipment restrict available space.

The PTO can provide power for:

High-flow hydraulic pumps
Fire apparatus pumps and systems
Refuse bodies and compactors
Vacuum pumps and blowers
Hydro-excavation equipment
Oilfield service equipment
Hydraulic cranes
Recovery equipment
Specialized municipal equipment
Other heavy-duty vocational systems

Common Specifications

PTO Type: Hydraulic PowerShift power take-off
Mounting Position: Rear transmission mount
Transmission Application: Approved automatic transmissions with a rear-mount provision
Published Transmission Families: Allison TC10 and application-specific Caterpillar CX Series transmissions
Gear Ratio: 1:1
Torque Rating: 650 lb-ft or 881 N-m for intermittent and continuous operation
Power at 500 Output RPM: 62 horsepower or 46 kilowatts
Power at 1,000 Output RPM: 124 horsepower or 93 kilowatts
Approximate Weight: 50 pounds or 22.8 kilograms
Shift Options: 12-volt or 24-volt electric-over-hydraulic
Assembly Arrangements: Bracket-up with the control valve positioned to the left or right when viewed from the rear
Output Options: SAE B, SAE BB, SAE C, ISO 7653 DIN, and 1410 Series companion-flange configurations
Direct-Pump Lubrication: Wet-spline output system
Pump Support: PTO-and-pump support bracket included

Specifications and availability must be verified using the complete PTO model number and the exact transmission application.

Power, Torque, Speed, and Operating Capacity

The 590 Series has a published torque rating of 650 lb-ft for both intermittent and continuous operation across its available output options. This rating makes it suitable for heavy-duty applications that require sustained hydraulic or mechanical power.

At 500 output RPM, Parker publishes a rating of 62 horsepower. At 1,000 output RPM, the published rating increases to 124 horsepower.

The PTO uses a 1:1 ratio, but actual output speed still depends on the speed supplied by the transmission’s rear PTO drive. The transmission’s control strategy and engine operating speed must therefore be considered when calculating pump or equipment speed.

The PTO, hydraulic pump, auxiliary driveline, and driven equipment must all remain within their individual speed, torque, pressure, and temperature ratings.

Intended Transmission and Mounting Position

The 590 Series is designed for automatic transmissions equipped with an approved rear-mount PTO provision. Parker identifies applications for the Allison TC10 and application-specific Caterpillar CX Series transmissions.

Compatibility must be established using the exact transmission model, transmission specification, PTO provision, software configuration, and vehicle application.

The rear mounting position must provide sufficient clearance for:

Hydraulic pump body
Pump support bracket
Hydraulic hoses and fittings
Auxiliary driveline when equipped
Transmission cooler and related plumbing
Crossmembers
Driveshaft and driveline movement
Exhaust-system components
Body and vocational equipment
Service access

PTO Engagement and Shift System

The 590 Series uses an electric-over-hydraulic shift system. The electrical control activates a hydraulic valve that applies pressure to the PTO’s internal clutch.

Available shift configurations include:

12-volt electric-over-hydraulic shift
24-volt electric-over-hydraulic shift
Vehicle-integrated PTO request circuit
Dash-mounted engagement control
Application-specific body-controller integration

The vehicle may require specific transmission ranges, parking-brake status, engine speed, vehicle speed, or other operating conditions before engagement is permitted.

The PTO should only be engaged or disengaged according to the procedures supplied for the exact transmission, PTO, vehicle, and driven equipment.

Power Transfer and Output Design

The 590 Series offers six output configurations. Five support direct-mounted hydraulic pumps, while one uses a companion flange for remote equipment.

Available output types include:

SAE C four-bolt flange with SAE C shaft
SAE B two- or four-bolt flange with SAE B shaft
SAE B two- or four-bolt flange with SAE BB shaft
SAE B two- or four-bolt flange with SAE C shaft
ISO 7653 pump mount with DIN 5462 shaft
1410 Series companion flange

The direct-pump outputs incorporate wet-spline lubrication. The companion-flange output permits the PTO to power equipment through a properly designed auxiliary driveline.

Hydraulic Circuit and Equipment Integration

The 590 Series is commonly used with high-capacity hydraulic systems. PTO output speed, pump displacement, system pressure, desired flow, and duty cycle must be calculated together.

A complete system may include:

Direct-mounted hydraulic pump
Hydraulic reservoir
Suction hose and shutoff valve
Pressure and return lines
Directional-control valves
Pressure-relief valve
Return and pressure filtration
Hydraulic-oil cooler
Temperature and pressure sensors
Hydraulic cylinders or motors
PTO and body-control interlocks
Engine-speed-control system

The hydraulic circuit must remain within the PTO’s 650 lb-ft torque rating and the ratings of the pump, hoses, valves, reservoir, and driven equipment.

Housing, Shaft, Bearing, and Clutch Design

The 590 Series combines a rear-mount housing, hydraulic clutch, output shaft, bearing system, and control valve into a heavy-duty PowerShift assembly.

The internal clutch permits controlled hydraulic engagement without a mechanically shifted sliding gear. The rear-mount connection also eliminates the gear-backlash adjustment associated with conventional side-mounted PTO installations.

Direct-pump outputs use a lubricated spline connection. This design helps reduce fretting, corrosion, and wear at the interface between the PTO output shaft and hydraulic-pump input shaft.

Controls and Electronic Integration

The 590 Series requires electrical and hydraulic integration with the transmission and vehicle. The PTO request signal may pass through the transmission controller, engine controller, body-control system, or a dedicated PTO control circuit.

The control system may include:

PTO engagement switch
Engagement indicator lamp
Transmission PTO-request circuit
Electric hydraulic-control solenoid
Parking-brake interlock
Transmission-range interlock
Vehicle-speed interlock
Engine-speed limit
Remote throttle control
Body-equipment interlock
PTO confirmation switch
Automatic disengagement logic

The wiring, programming, and hydraulic connections must follow the approved instructions for the exact transmission and vehicle.

Efficiency, Heat, and Lubrication

The 590 Series depends on the correct transmission lubricant and hydraulic actuation pressure. The clutch, bearings, shafts, and wet-spline output must receive adequate lubrication during operation.

Wet-spline lubrication supplies oil to the connection between the PTO output shaft and pump input shaft. Parker states that this design can substantially increase PTO and pump-shaft life compared with an unlubricated spline connection.

Heat can be created by excessive torque, excessive speed, clutch slip, restricted lubrication, hydraulic inefficiency, or continuous operation at loads beyond the system’s ratings.

Transmission-fluid level, fluid condition, oil temperature, hydraulic pressure, and PTO operating behavior should be monitored according to the vehicle’s maintenance requirements.

Duty Cycle and Operating Conditions

The Chelsea 590 Series is rated for both intermittent and continuous operation at up to 650 lb-ft. This makes it suitable for applications that require extended power delivery rather than short operating cycles alone.

Actual suitability depends on:

Required continuous torque
Peak and shock loads
Output speed
Hydraulic-pump displacement
System pressure
Hydraulic-fluid temperature
Transmission lubrication
Vehicle movement during PTO operation
Ambient temperature
Pump weight and support
Auxiliary-driveline operating angles
Driven-equipment duty cycle

Continuous-duty approval for the PTO does not automatically mean that every connected pump, driveline, hose, valve, or hydraulic component is suitable for continuous operation.

Mounting and Installation

The 590 Series mounts to the rear PTO provision on an approved automatic transmission. Because it does not use an externally meshed side-drive gear, there is no PTO gear backlash to establish during installation.

The installer must verify:

Correct transmission and rear-mount provision
Correct PTO model number
Correct input and mounting components
Required 12- or 24-volt shift system
Correct output configuration
Assembly position and valve orientation
Proper mounting-surface condition
Correct seals and fastener torque
Pump and hose clearance
Support-bracket installation
Electrical-control connections
Hydraulic shift-pressure supply
Transmission-fluid level
Transmission-controller programming

The included PTO-and-pump support bracket should be installed according to Parker’s instructions. Improper pump support can damage the PTO, transmission housing, pump flange, or spline connection.

Transmission and Vehicle Compatibility

The 590 Series must be matched to a transmission with the correct rear-mount PTO provision. Published applications include the Allison TC10 and application-specific Caterpillar CX Series automatic transmissions.

Compatibility depends on:

Transmission manufacturer
Transmission model and specification
Rear PTO provision
Transmission software and control strategy
PTO input arrangement
Electrical-system voltage
Available hydraulic actuation pressure
Rear transmission clearance
Driveshaft and crossmember placement
Exhaust-system location
Pump dimensions
Body and vocational-equipment layout

The PTO should not be ordered solely because the vehicle uses an Allison or Caterpillar transmission. The exact transmission model and build specification must be confirmed.

Pump, Driveshaft, and Driven-Equipment Compatibility

The direct-mounted pump must match the PTO’s flange, pilot, shaft size, spline, rotation, torque rating, and operating-speed range.

Available pump-output families include SAE B, SAE BB, SAE C, and ISO 7653 DIN configurations. The selected output must be verified against the exact hydraulic pump.

Applications using the 1410 Series companion flange require a correctly designed auxiliary driveline. Shaft length, universal-joint size, operating angles, critical speed, guards, slip travel, and equipment alignment must be evaluated.

The complete powertrain is limited by its lowest-rated PTO, pump, flange, shaft, universal joint, hydraulic component, or driven-equipment rating.

Hydraulic Fluid, Filtration, and Reservoir Compatibility

The hydraulic system should use fluid that meets the viscosity, temperature, and additive requirements of the pump and powered equipment. The reservoir must provide adequate fluid volume, deaeration, cooling, and contamination control.

Suction hoses should be sized to prevent excessive restriction. Return filtration, reservoir breathers, and oil coolers should support the pump’s flow without producing excessive backpressure.

Contaminated, aerated, or overheated hydraulic fluid can damage the pump and increase the torque demand placed on the PTO.

Common Applications

Fire apparatus
Rescue vehicles
Refuse trucks
Vacuum trucks
Hydro-excavation trucks
Oilfield service vehicles
Hydraulic-crane trucks
Recovery vehicles
Municipal equipment
High-flow wet-line systems
Specialized construction trucks
Heavy-duty vocational vehicles

Advantages

650 lb-ft intermittent and continuous torque rating
Rear-mount design
No gear backlash to set
Reduced installation time compared with many side-mounted PTOs
Improved clearance for large hydraulic pumps
Wet-spline direct-pump outputs
Six output configurations
12- and 24-volt shift options
Direct-pump and auxiliary-driveline capability
PTO-and-pump support bracket included
High power-to-weight ratio
Suitable for continuous-duty applications
Designed for demanding vocational equipment

Limitations or Considerations

Requires a transmission with an approved rear-mount PTO provision
Uses a fixed 1:1 ratio
Transmission and control-system compatibility must be confirmed
Rear-mount clearance must be checked carefully
Electrical-system voltage must match the PTO shift configuration
Direct-mounted pumps require the correct flange and shaft
The pump support bracket must be properly installed
Wet-spline outputs require correct lubrication
Heavy-duty hydraulic systems require adequate cooling and filtration
Transmission programming may be required
Auxiliary-driveline versions require alignment and guarding
The PTO’s rating does not override pump or equipment limitations

Driver and Operator Experience

The 590 Series can provide smooth push-button engagement when correctly integrated with the transmission and vehicle-control system. Its PowerShift clutch eliminates the manual gear engagement associated with traditional mechanically shifted PTOs.

Operators should monitor:

PTO engagement confirmation
Engine and output speed
Hydraulic pressure
Hydraulic-fluid temperature
Transmission temperature
Pump or driveline vibration
Unexpected disengagement
Slow equipment response
Fluid leakage
Warning lamps or control-system faults

PTO Engagement and Operating Procedure

The exact engagement procedure depends on the transmission, vehicle programming, and powered equipment. Operators must follow the procedures supplied by Parker, the transmission manufacturer, and the completed vehicle manufacturer.

A typical stationary engagement procedure may require the vehicle to be stopped, the parking brake applied, the transmission placed in an approved range, and the engine reduced to idle before the PTO request is activated.

After the control system confirms engagement, engine speed can be increased to the level required by the hydraulic pump or auxiliary equipment. The operator should remain within all published speed, pressure, temperature, and load limits.

Before road travel, the PTO should be disengaged when required and the body or equipment secured in its transport position.

Inspection and Wear Points

PTO housing and transmission mounting surface
Mounting fasteners
Input coupling
Hydraulic clutch components
Output bearings
Output shaft and splines
Wet-spline lubrication system
Pump flange and pilot
PTO-and-pump support bracket
Hydraulic control valve
Electric shift solenoid
Wiring and connectors
Hydraulic-pressure passages and fittings
Pump and hydraulic hoses
Companion flange and auxiliary driveline when equipped
Fluid seals and O-rings

Lubrication Requirements

The 590 Series depends on the transmission’s approved lubricant and lubrication system. Correct fluid type, level, condition, pressure, and temperature are essential for the PTO clutch, bearings, and output system.

Direct-pump configurations use wet-spline lubrication to protect the interface between the PTO shaft and pump shaft. This lubrication helps reduce spline fretting, corrosion, and premature wear.

A wet-spline PTO should not be operated without the correct pump or approved driven component installed. Open or incorrectly assembled wet-spline outputs may lose lubricant or suffer internal damage.

Maintenance and Ownership Notes

Routine maintenance should include checking PTO mounting fasteners, the pump support bracket, electrical connections, shift operation, transmission-fluid condition, hydraulic hoses, output splines, and auxiliary-driveline components.

New or serviced installations should be inspected after their initial operating period. Fasteners, brackets, hoses, fittings, and wiring can settle or shift during early operation.

Changes in engagement time, operating noise, temperature, hydraulic performance, or vibration should be investigated promptly. Continued operation with a slipping clutch, damaged spline, loose pump, or lubrication problem can produce extensive secondary damage.

Common PTO and Hydraulic-System Problems

PTO will not engage: Insufficient hydraulic pressure, an electrical fault, a failed solenoid, incorrect transmission programming, an unsatisfied interlock, or internal clutch damage may prevent engagement.
PTO will not disengage: A sticking hydraulic valve, trapped pressure, electrical-control failure, damaged clutch components, or transmission-control fault may keep the PTO engaged.
Clutch slips under load: Low hydraulic pressure, contaminated fluid, worn clutch components, excessive torque, excessive temperature, or an internal leak may allow slippage.
Wet-spline wear: Insufficient lubrication, misalignment, pump movement, incorrect shaft geometry, or a loose support bracket can damage the PTO and pump splines.
Slow hydraulic operation: Low engine speed, an incorrect pump, suction restriction, low fluid level, pump wear, internal hydraulic leakage, or a relief-valve problem may reduce system performance.
Overheating: Excessive load, clutch slippage, restricted lubrication, hydraulic inefficiency, insufficient cooling, or contaminated fluid may cause abnormal temperatures.
Fluid leakage: Damaged seals, loose fittings, worn O-rings, mounting-surface damage, or excessive internal pressure may allow transmission or hydraulic fluid to escape.
Vibration: A loose or unsupported pump, worn spline, misaligned auxiliary driveline, damaged universal joint, or unbalanced rotating component may create vibration.

Safety and Service Precautions

Before servicing the PTO or hydraulic system, shut down the engine, secure the vehicle, relieve hydraulic pressure, disconnect electrical power when required, and prevent the powered equipment from moving.

Never work beneath a raised dump body, refuse body, crane, aerial device, or hydraulically supported component without the manufacturer’s approved mechanical blocking or support system.

Auxiliary drivelines must be guarded. Hands, clothing, tools, and loose objects must be kept away from rotating shafts, companion flanges, and universal joints.

PTO installation, transmission programming, hydraulic-pressure testing, and internal service should be completed by qualified personnel using the instructions for the exact PTO and transmission.

Identification Information

The complete Chelsea model number identifies the basic PTO series, mounting option, ratio, transmission input, lubrication system, shift voltage, assembly arrangement, and output configuration.

Record the following information before ordering a PTO or replacement parts:

Complete Chelsea PTO model number
PTO serial or production information
Vehicle identification number
Truck manufacturer and model
Transmission manufacturer
Complete transmission model and specification
Rear-mount provision information
Electrical-system voltage
Shift-option code
Assembly arrangement
Output-option code
Hydraulic-pump manufacturer and model
Pump flange and shaft specification
Driven-equipment requirements
Transmission-control programming information

Do not identify replacement equipment from appearance or the 590 Series designation alone.

Buying Considerations

Verify that the transmission has an approved rear-mount PTO provision
Record the complete transmission model and specification
Confirm the required continuous and peak torque
Calculate the required pump speed and flow
Confirm that the 1:1 ratio suits the application
Select the correct pump flange and shaft
Choose between direct-pump and driveline output
Match the 12- or 24-volt electrical system
Confirm the required assembly arrangement
Check rear transmission and crossmember clearance
Verify hydraulic-pump dimensions
Install the correct PTO-and-pump support bracket
Confirm transmission programming requirements
Review cooling and filtration requirements
Verify wet-spline lubrication requirements
Use an experienced PTO and hydraulic-system installer

Variants and Configurations

Allison TC10 application configurations
Application-specific Caterpillar CX configurations
12-volt electric-over-hydraulic shift
24-volt electric-over-hydraulic shift
Bracket-up with left-side control valve
Bracket-up with right-side control valve
SAE B pump flange with SAE B shaft
SAE B pump flange with SAE BB shaft
SAE B pump flange with SAE C shaft
SAE C four-bolt flange with SAE C shaft
ISO 7653 pump mount with DIN 5462 shaft
1410 Series companion-flange output
Direct-mounted hydraulic-pump installations
Remote auxiliary-driveline installations

Comparison to Similar Equipment

Compared with the Parker Chelsea 489 Series Power Take-Off, the 590 is a rear-mounted hydraulic PowerShift PTO designed for substantially higher continuous torque. The 489 is primarily an eight-bolt mechanical PTO for manual-transmission applications.

Compared with the Parker Chelsea 280 Series Power Take-Off, the 590 mounts at the rear of the transmission and carries a higher published torque rating. The 280 is a ten-bolt constant-mesh PTO for compatible automatic transmissions.

Compared with the Parker Chelsea 870 Series Power Take-Off, the 590 uses a rear-mount 1:1 design for a narrower group of automatic transmissions. The 870 is a side-mounted ten-bolt PowerShift PTO available with multiple ratios for Allison 3000 and 4000 Family transmissions.

Compared with the Muncie FR6Q Power Take-Off, both are rear-mount PTO solutions. Transmission coverage, controls, torque ratings, ratios, outputs, and mounting systems must be compared for the exact vehicle application.

Best Fit For

Compatible automatic transmissions with rear PTO provisions
Allison TC10 applications
Approved Caterpillar CX Series applications
Continuous-duty hydraulic systems
Applications requiring up to 650 lb-ft of torque
Fire and rescue apparatus
Refuse vehicles
Vacuum and hydro-excavation trucks
Oilfield service equipment
Large direct-mounted hydraulic pumps
Installations with limited side-transmission clearance
Remote equipment using a 1410 Series driveline

Related Vehicle and Trailer Types

Related Truck and Trailer Models

Related PTO and Hydraulic System Types

Related PTO and Hydraulic Products

Related Equipment Systems

Related Guides

Regulatory and Compliance Notes

PTO and hydraulic-system installations must preserve the vehicle’s braking, steering, transmission, driveline, electrical, exhaust, emissions, fuel-system, and structural integrity.

The completed vehicle must remain within its gross vehicle weight, axle, frame, tire, wheel, transmission, and driveline ratings. Installing a 590 Series PTO does not increase the vehicle’s certified weight or equipment ratings.

Hydraulic hoses, rotating shafts, raised bodies, cranes, outriggers, vacuum equipment, and other powered systems may be subject to workplace-safety, inspection, guarding, and operating requirements.

The final-stage manufacturer or equipment installer is responsible for ensuring that the completed vehicle complies with applicable regulations and certification requirements.

Real World Operating Notes

The rear-mount design can make the 590 Series easier to package with a large hydraulic pump, but clearance must still be checked around the driveshaft, crossmembers, exhaust, transmission cooler, and vocational body.

The 1:1 ratio simplifies PTO selection, but it does not eliminate the need to calculate pump speed. The speed provided by the transmission’s rear PTO drive must be compared with the pump’s operating range.

The included pump support bracket is an important structural component. A large hydraulic pump should not be allowed to place uncontrolled bending loads on the PTO or transmission housing.

Wet-spline lubrication reduces a common source of PTO and pump-shaft wear, but it must remain correctly supplied and sealed. Evidence of dry splines, red fretting debris, leakage, or pump movement should be investigated promptly.

Frequently Asked Questions

What is the Parker Chelsea 590 Series PTO?

It is a heavy-duty hydraulic PowerShift PTO designed for automatic transmissions with an approved rear-mount provision.

Is the 590 Series a side-mounted PTO?

No. It mounts at the rear of a compatible transmission.

Does the 590 require gear-backlash adjustment?

No. Its rear-mount design does not require the gear-backlash adjustment associated with conventional side-mounted PTOs.

How much torque can the 590 Series handle?

Parker publishes a torque rating of 650 lb-ft for both intermittent and continuous operation.

What is the PTO ratio?

The 590 Series uses a 1:1 ratio.

What shift systems are available?

The PTO is available with 12- or 24-volt electric-over-hydraulic shifting.

Does the 590 directly mount a hydraulic pump?

Yes. It is available with SAE B, SAE BB, SAE C, and ISO 7653 DIN pump-mount configurations.

Can the 590 power remotely mounted equipment?

Yes. A 1410 Series companion-flange output is available for properly designed auxiliary-driveline applications.

What is a wet-spline output?

A wet-spline system supplies lubricant to the connection between the PTO output shaft and hydraulic-pump input shaft. This helps reduce spline fretting and wear.

How is the correct 590 Series PTO identified?

Use the complete Chelsea model number, transmission model and specification, electrical voltage, assembly arrangement, output configuration, pump information, and vehicle application.

Availability and Where to Find

Parker Chelsea 590 Series PTOs, output components, shift controls, support brackets, service parts, and related hydraulic equipment may be available through Parker Chelsea distributors, commercial-truck dealers, body builders, hydraulic-equipment suppliers, and vocational-truck installers.

Availability depends on the transmission application, electrical voltage, assembly arrangement, output configuration, hydraulic pump, and completed vehicle design.

Current product information, application assistance, technical literature, and distributor resources are available through the Parker Chelsea website.

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