X70 Plugin motor catalog Powering Business Worldwide

X70 PLUGIN MOTOR CATALOG

2 Speed axial piston motor Eaton Medium Duty Piston Motors convert hydraulic energy supplied by the pump to mechanical energy. These motors are uniquely suited to fit any application that requires continuous rotary motion at a remote location from the power source. Axial piston motors share the design advantages of piston pumps to provide long-lasting power in a lightweight, easily serviceable package. The table below provides an overview of features. For a complete list of options, refer to the Model Code section of a given motor displacement. Field proven rotating group design 2 speed option...

Technical specifications Parameter Maximum rated speed at rpm maximum displacement Maximum rated speed at rpm minimum displacement Nominal pressure rating * bar [psi] Peak pressure rating ** bar [psi] Output torque (theoretical) N-m / bar [lbf-in/1000 psi] Shift pressure range bar [psi] Maximum allowable case pressure bar [psi] Viscosity - Minimum cSt Viscosity - Optimum working range cSt Viscosity - Maximum cSt Maximum Fluid Temp-Inlet °C Minimum Fluid Operating Temp °C Ambient Temperature °C Weight lbs [kg] Notes: * Nominal pressure : Max. delta...

X7M X70 variable displacement piston motor Mounting flange A Plug-in mount Output shaft 01 15 Tooth 16/32 Spline Main ports sizing A M27 X 2 Metric O-Ring port (A & B) B 1.0625-12 UN-2B SAE o-ring port (A & B) Port orientation 1 Radial ports Motor control options A Single input directly operated, external control supply, without pilot valve Control solenoids 0 None Supply orifice 0 No orifice 1 Shuttle valve with loop flushing 2 Blocked shuttle valves 3 Anti cavitation valve, unidirectional LH (CCW) Rotation 4 Anti cavitation valve, unidirectional RH Flushing...

2 Speed axial piston motor Loop flushing valve The spring centered shuttle valve, located in the motor’s end cover, moves to connect the low pressure side of the loop to the low pressure relief valve. When back pressure gets high enough the low pressure relief valve, in the end cover, opens and charge pump flow enters the motor case. Case flow flushes the pump and motor cases and helps keep the transmission cool. The low pressure relief valve in the motor’s end cover typically has a lower setting than the charge pressure relief valve in the charge pump. This is so case flow will begin at the...

2 Speed axial piston motor Anti cavitation valve 1 allow flow from delivery side back to suction side of motor. So, ultimately motor suction will get the required flow to run motor at desired speed. Anti-cavitation valve is to prevent the cavitation of the motor during deceleration and spin down. These are the conditions in which pump does not generate sufficient flow to fulfill motor requirements. Reduced flow creates vacuum at the motor suction which intern reduces pressure below partial pressure and arises cavitation. By introduction of the check valve in the circuit this condition will get...

2 Speed axial piston motor Brake release port X70 series plugin motors are provided with a brake release port to allow the user to make an access to the brake-release feature of the machine gear box from the rear side of the motor. While all motors will have the brake release port, not all gearboxes are compatible with this motor feature. Get in touch with your EATON representative in case of queries. The rated pressure for the brake release port on the motor housing is 250 bar (this does take into account the O-ring interface between the motor and gearbox). Check your gearbox for compatibility...

2 Speed axial piston motor Motor installation drawings Requires an o-ring: Viton 75 Durometer cross section -2.6 ± 0.07[0.103 ± 0.003] I.D. -126.6 ± 0.8[4.987 ± 0.035] Case drain side .750 - 16 UNF -2B SAE o-ring port (shown plugged) Mating o-ring min installed inside Ø4.8 [0.19] Case drain side .750 -16 UNF - 2B SAE o-ring port (shown plugged) 102.4 [4.03] Control port .5625 - 18 UNF - 2B SAE o-ring port Brake release port .4375 - 20 UNF - 2B SAE o-ring port (shown plugged) 1 Main ports 1.0625 - 12 UN - 2B SAE o-ring port X70 PLUGIN MOTOR CATALOG

2 Speed axial piston motor Shaft installation drawings 15 Tooth 30º flat root side fit 16/32 class 5 spline per ANSI B92.1 Hydraulic System Design Calculations Basic Formulas Component selection The following components are necessary for transmission operation: The long service life of Eaton hydrostatic transmissions is largely dependent on the proper selection and installation of the components necessary for transmission operation. Variable displacement pump Fixed or variable displacement motor Reservoir Filter Charge pump inlet line Pump and motor case drain lines High pressure lines Heat exchanger...

Reservoir The reservoir is an important part of the hydrostatic transmission system. It should provide adequate oil storage and allow easy oil maintenance. The reservoir must hold enough oil to provide a continuous oil supply to the charge pump inlet. It must also have enough room for the hydraulic oil to expand as the system warms up. Consider charge pump flow when sizing the reservoir: One half (.5) minute times (X) the maximum charge pump flow should be the minimum oil volume in the reservoir. Maintaining this oil volume will give the oil a minimum of thirty (30) seconds in the reservoir....

Heat exchanger bypass valve The heat exchanger bypass valve is a pressure and/or temperature valve in parallel with the heat exchanger. Its purpose is to prevent case pressures from getting too high. The heat exchanger bypass valve opens when the oil is thick, especially during cold starts. Reservoir return line The same general requirements that apply to case drain lines apply to the reservoir return line. Bearing life estimation Bearing life is defined as the length of time in terms of revolutions or time until a fatigue failure. Bearing load is calculated as a reaction which is derived from...