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W series - Wheel Motors

W series - Wheel Motors
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W series - Wheel Motors

Product catalog summary
Introduction
The W series hydraulic motors by Italgroup are designed for diverse applications such as agricultural machinery, municipal vehicles, and mining machines. They feature high efficiency, smooth low-speed operation, high starting torque, compact design, and low maintenance. These bi-directional motors support both open and closed circuits and can handle high radial and axial forces.
Preliminary Selection
The motors offer a wide operating range and high load capacity, focusing on high starting torque and permissible radial loads on the motor output flange.
Ordering Code
The ordering code includes specifications for motor type, displacement, brake options, output flange configuration, and additional features like valves and tachometers.
Hydraulic Motor Instructions and Advice
Installation requires clean hoses and piping, with the motor mountable in any position. The motor should be filled with oil before starting, and case drain pressure should not exceed 6 bar. Temperature should not exceed 70°C, and viscosity should be within 3°E to 10°E for optimal performance.
Gear Unit Instructions and Advice
Regular maintenance includes oil changes every 800 hours and monitoring lubricant levels. Recommended oils include AGIP BLASIA 220 and SHELL OMALA EP 220.
Hydraulic Fluid Recommendations
Hydraulic oils with a minimum viscosity index of 95 and anti-wear additives are recommended. The maximum continuous working temperature is 70°C.
Filtration and Oxidation
Hydraulic systems require filtered oil, with 25 μm filtration for most applications and 10 μm for closed circuits. Regular checks and maintenance are necessary to prevent oxidation.
Oil Analysis and Maintenance
Regular oil analysis is recommended every six months to monitor viscosity, oxidation, water content, additives, and contamination. Immediate oil replacement is necessary if excessive oxidation is detected.
Hydraulic Motor Shaft Seal Features
The shaft seal materials include SIMRIT® 72 NBR 902 and SIMRIT® 75 FKM 595, suitable for temperatures ranging from -40°C to +160°C.
Freewheeling Operation
Freewheeling can lead to cavitation, causing issues like metallic erosion and overheating. Italgroup recommends using HC series motors to mitigate these effects.
Drain Recommendations
Proper motor filling and piping arrangements are crucial to prevent air bubbles and ensure efficient operation.
Flushing Flow Measurement
Flushing flow should be measured to ensure adequate oil viscosity during motor operation, with a recommended range of 50 to 80 cSt.
Formulas and Conversions
Formulas for calculating torque, power, speed, displacement, flow, and pressure are provided, along with conversion tables.
Technical Specifications
Detailed specifications for various models include motor displacement, gear ratio, specific torque, continuous and peak pressure, maximum speed, continuous and peak torque, maximum power, braking torque, brake release pressure, operating temperature, and dry weight.
Procedures and Recommendations
It is recommended to fill the motor with hydraulic oil before start-up and ensure flushing for maximum power operation.
Performance Curves
Performance curves illustrate output torque, maximum power, and efficiency across different speeds and pressures.
Radial and Axial Loads
Diagrams and data for radial and axial loads are provided, with B10 revolutions data for different load scenarios.
Ordering and Contact Information
Details for ordering codes are provided, with a note to contact Italgroup for more information.
General Notes
All data in the catalogue are for product description purposes only and are not legally binding. Italgroup reserves the right to make modifications without notice.
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Catalog excerpts

W series - Wheel Motors-3

ITALGROUP WHEEL MOTORS W SERIES TECHNICAL CATALOGUE INDEX PRELIMINARY SELECTION ORDERING CODE DRUM BRAKE DB HYDRAULIC MOTOR INSTRUCTIONS AND ADVICES GEAR UNIT INSTRUCTIONS AND ADVICES HYDRAULIC FLUID RECOMMENDATIONS HYDRAULIC MOTOR SHAFT SEAL FEATURES GEAR UNIT SHAFT SEAL FEATURES FREEWHEELING DRAIN RECOMMENDATIONS FLUSHING W05 WHEEL MOTOR W08 WHEEL MOTOR W11 WHEEL MOTOR FLOW DISTRIBUTORS TACHOMETERS - VALVES The data specified into the catalogue are for product description purpose only and must not be interpreted as warranted characteristics in legal sense. Italgroup S.r.l. reserves the right...

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W series - Wheel Motors-4

APPLICATION DATASHEET STUD BOLTS The data specified into the catalogue are for product description purpose only and must not be interpreted as warranted characteristics in legal sense. Italgroup S.r.l. reserves the right to implement modifications without notice. All partial or total reproduction and copy without written authorization of Italgroup S.r.l. is strictly forbidden.

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W series - Wheel Motors-5

The data specified into the catalogue are for product description purpose only and must not be interpreted as warranted characteristics in legal sense. Italgroup S.r.l. reserves the right to implement modifications without notice. All partial or total reproduction and copy without written authorization of Italgroup S.r.l. is strictly forbidden.

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W series - Wheel Motors-6

Hydraulic motors of the W series are crankshaft radial piston motors combined with single stage planetary gearbox, rear case mounting and wheel flange. Thanks to great variety of accessories W series is a complete wheel drive for open or closed circuits used in a wide range of applications such as: • Agricultural and forestry machines • Municipal vehicles • Airport machinery • Fork lifts trucks • Skid steer loaders • Dumpers • Mining machines • Self-propelled trailers • Undercarriages • Winches and Cranes drive • Conveyors drive Product Features: High volumetric and mechanical efficiencies Very...

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W series - Wheel Motors-7

PRELIMINARY SELECTION H YDRA ULtC US TOPS WIDE OPERATING RANGE High starting torque Wheel Speed [rpmj Permissible Radial Loads on motor output flange (Fr) The data specified into the catalogue are for product description purpose only and must not be interpreted as warranted characteristics in legal sense. Italgroup S.r.l. reserves the right to implement modifications without notice. All partial or total reproduction and copy without written authorization of Italgroup S.r.l. is strictly forbidden.

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W series - Wheel Motors-8

ORDERING CODE NEGATIVE BRAKE SPECIAL FEATURES Italgroup internal code WHEEL STUD With negative brake Without negative brake MOTOR TYPE WHEEL SIDE OUTPUT FLANGE Wheel flange Wheel flange with mechanical disengagement Wheel flange with drum brake OUTPUT FLANGE CONFIGURATION The data specified into the catalogue are for product description purpose only and must not be interpreted as warranted characteristics in legal sense. Italgroup S.r.l. reserves the right to implement modifications without notice. All partial or total reproduction and copy without written authorization of Italgroup S.r.l. is...

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W series - Wheel Motors-9

RIGHT SIDE ORDERING CODE DX TRAVEL DIRECTION LEFT SIDE ORDERING CODE SX When the wheel motor is equipped with dynamic brake (drum brake, output flange DB), and when handbrake is needed, customer needs to specify an additional information on the ordering code. Infact, the wheel motor can be positioned on the left or right side. Refer to the below scheme for better understanding. Contact Italgroup for further information/requests. Dynamic brake is usually operating with brake fluid (like DOT 3 or DOT 4); if you want to activate dynamic brake with other fluids (like hydraulic motor fluid for example,...

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W series - Wheel Motors-10

HYDRAULIC MOTOR INSTRUCTIONS AND ADVICES Hoses and piping must be clean and free from contamination. No other special requirements are necessary. - Motor can be mounted in any position - In run-away conditions you must use counterbalance valves - Consult factory for intermittent applications Splined adaptors (sleeves) are available upon request. Installation circuit The choice of open or closed loop circuit will be determined by the application. Open loop circuits are cheaper and simpler to install. Closed loop circuit is a superior circuit and usually takes up less space. It also offers better...

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W series - Wheel Motors-11

HYDRAULIC MOTOR INSTRUCTIONS AND ADVICES Minimum speed The operating fluid viscosity must always be higher than a certain minimum value (see “fluid recommendation” section) in order to guarantee an optimal motor internal lubrication. When the working conditions cause the motor case overheating above a critical value, the motor flushing is required. Flushing consists in the introduction of fresh oil (taken from the hydraulic circuit) into the motor case. Oil must be taken from the return line to avoid internal motor damage (the continuous motor case pressure must be maximum 6 bar). Flushing is...

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W series - Wheel Motors-12

HYDRAULIC MOTOR FLUID RECOMMENDATIONS Fluid selection In general, we recommend the use of hydraulic oils with minimum viscosity index of 95, with anti-wear additives (ISO HM and HV). Once normal working temperature is reached, the drain oil viscosity must be at least 44 cSt, preferably in the range from 50 to 80 cSt. HE oils (ecological fluids) are allowed, but must be used with particular attention, because them can influence the motor seals compatibility, and can reduce motor performances and life. Please contact us in case of HE oils usage. Optimal viscosity selection Referring the first approximated...

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HYDRAULIC MOTOR FLUID RECOMMENDATIONS Hydraulic systems oil must always be filtered. The choice of filtration grade derives from needs of service life and money spent. In order to obtain stated service life it is important to follow our recommendations concerning filtration grade. When choosing the filter it is important to consider the amount of dirt particles that filter can absorb and still operate satisfactorily. For that reason we recommend filters showing when you need to substitute filtering cartridge. · 25 μm filtration required in most applications · 10 μm filtration in closed circuit...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.