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TROUBLESHOOTING HYDRAULIC SYSTEM PROBLEMS

The most common problems encountered with the hydraulic system are caused by dirt and debris that
get into the system. IT IS VERY IMPORTANT TO KEEP THE HYDRAULIC SYSTEM CLEAN.
Following these simple maintenance practices can help prevent unnecessary down-time:

1) Replace the hydraulic system filter element as specified in the Service section of this manual with
the proper replacement element.

2) If the hydraulic system has to be worked on, such as to change a failed hose or other component of
the system, take special care to keep dirt out of the system by capping and plugging all broken
connections, preferably with steel JIC caps and plugs. Before disconnecting a hose, clean the hose
end area thoroughly (a toothbrush works well).

3) Clean new hose assemblies thoroughly before installing them; blowing compressed air through
them works well. Once they are cleaned, plug the ends of new hose assemblies until they are
actually installed.

4) Be sure that any oil added to the system is clean. Ideally, any oil added to the system should be
pumped through a filter before it is poured into the hydraulic tank. Be sure any funnels or containers
that come into contact with the fluid are thoroughly cleaned before use.

GENERAL INFORMATION

Typically, hydraulic system problems caused by dirt can be recognized as follows: A function fails to
operate in one or both directions. In this case, the problem is most likely due to dirt affecting the load
sensing circuit of the function,or else the actuator (cylinder or motor) is allowing the oil to leak by. If,
after removing and plugging the lines at the actuator, full system pressure builds up when you shift that
function’s control valve, then the problem probably lies within the actuator. If, after removing and
plugging the lines at the actuator, full system pressure still cannot be obtained, then dirt affecting the
load sensing system is probably the cause. The most likely place for this to occur is at the load sense
check ball located in each hydraulic manifold.

TROUBLESHOOTING ELECTRICAL SYSTEM PROBLEMS

SPECIFIC PROBELEMS AND SOLUTIONS

PROBLEM: Electrical component on machine is not working.
POSSIBLE CAUSE: Loose connection on machine (such as ground cable), broken wire, or broken
connection.
ACTION: Use a volt meter to check the amount of voltage a component is getting, it should be getting
12 volts. If not, check that circuit for any of the possible causes listed. Disconnect the battery before
attempting to correct the problem.

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