Parker 700 Series, Процедура обслуживания

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Bulletin 1531-001/USA
Pump/Motor Division
700 Series Service Procedure
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
5
Preliminary Checks
Hydraulic systems are often trouble-free. Hence, the
problem an operator complains of could be caused by
something other than the hydraulic components.
Thus, once you have determined that a problem ex-
ists, start with the easy-to-check items, such as:
• Parts damaged from impact that were not
properly repaired, or that should have been
replaced
• Improper replacement parts used in previous
servicing
• Mechanical linkage problems such as bind-
ing, broken or loose parts, or slipping belts
Hydraulic Components
If the motor has low speed or torque, look at the check
list on the next page first. Since these motors maintain
volumetric and torque efficiencies during their usual
life, the problem is usually elsewhere in the hydraulic
system.
However, there are hydraulic system problems which
can drastically reduce the long life designed into these
motors. Three key areas to check are:
• Temperature: Do not exceed 180˚ F.
• Fluid: Viscosity at the maximum temperature
must exceed 50 ssu.
• Filtration: A Beta 25 ratio of at least 2.
Troubleshooting Guide
Preparation
Make your troubleshooting easier by preparing as fol-
lows:
• work in a clean, well-lighted place
• have proper tools and materials nearby
• have an adequate supply of clean, petro-
leum-based solvent
• prior to any motor disassembly, plug the
open ports and case drain
• clean all dirt from outside the motor
• prior to assembly, lightly oil all seals, rollers,
rolls and the threaded bolt ends
Since solvents are flammable, be
extremely careful when using any
solvent. Even a small explosion
could cause injury or death.
Wear eye protection and be sure
to comply with OSHA and other
maximum air pressure require-
ments. WARNING
WARNING
NOTE Before troubleshooting any system prob-
lem, check service literature published
by the equipment and/or component
manufacturers. Follow their instructions, if
given, for checking any component other
than the motor unit.