Operating Instructions
Break-in period
The motor achieves its final properties during the first hours of use. Therefore all new
and reconditioned motors should go through an initial break-in period.
Things to be considered during break-in period:
• The break-in period should last for at least the first eight hours (8 h) of use.
• Operate the motors at average of 50% of rated speed and pressure.
• Limit the power output by limiting the working pressure, the speed of rotation or
both.
• Do not exceed 75% of the maximum pressure for more than two seconds every
minute.
Note:
During the break-in period, the moving parts of the motor wear against
each other so that the wear of the parts sets to a stable state for the
entire service life of the motor.
Use
Things to be considered during use of motors:
• Check the screw connections tightening torque and hydraulic connections
regularly.
• Do not use pressure cleaning directly between the shaft flange and housing of the
motor (the shaft seal area).
• Avoid situations in which the motors are completely submerged in water or mud.
Operating temperature
The operating temperature means the internal temperature of the motor. Take into
considerations the following requirements for the operating temperature:
• For improved service life, avoid over 70 °C (158 °F) operating temperature.
• The highest permissible intermittent operating temperature is 85 °C (185 °F).
• The lowest permissible operating temperature is -35 °C (-31 °F).
• The temperature difference between the motor and the hydraulic fluid should be
under 60 °C (140 °F).
The operating temperature may be measured from the hydraulic fluid returning from
the motor. Take into account the temperature of hydraulic fluid returning from the
drain line and from the return line (A or B).
Demounting the motor
Take into consideration the following things when demounting the motor for service
or replacement:
• Release the pressure in the hydraulic lines and let the motor cool down.
• Disconnect all the hydraulic lines from the motor and plug all openings and hoses.
• Demount the motor and lift it away from its position.
• Clean the outside of the motor thoroughly, but do not use any solvents.
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7.4
Operating Instructions
Product Manual
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