Alamo MACHETE Product Service Manual page 162

POSSIBLE FAILURE / CAUSE & SOLUTION
Hydraulic System Noise:
CAUSE:
Cavitation? Cavitation is caused by inadequate amount of fluid reaching the Pump,
Cavitation will damage Pump, so do not run with a Cavitation problem any more than
necessary to check system. If Suction side is pulling Air in the Oil will usually cause
Oil to Foam after running some.
SOLUTION:
Cavitation is usually caused by a restriction of some sort in the suction lines, but can
also be caused by an un-vented tank which creates a vacuum when the pump has a
demand for Oil. Other problems such as plugged Suction Screens or very thick Oil can
cause cavitation. The cause must be found and corrected before a new Pump is
installed as cavitation will damage a Pump. Repair or Replace components a required.
CAUSE:
Wrong Oil? (Oil to Thick or Viscous)
SOLUTION:
Make sure correct Oil is used, Recommended Hydraulic Oil only should be used. Do
not mix grades and types of Oil, if wrong oil has been used it must be completely
remove before adding different types Oil. See Specification Chart for recommended
Oil type
Hydraulic System Overheating:
Note: 1.
going too far into trouble shooting an overheating complaint it would be well to
understand exactly the difference between HOT and TO HOT.
2.
when the Oil moves from an area of High Pressure to an area of Low Pressure. These
"Pressure drops" occur when work is performed by the System and normally occurs
in Pumps, Motors, Hoses and Valves. They are expected and allowed for in the design
of the System.
3.
Degrees F. above ambient temperature (Ambient Temperature measured close to
Tank) with the proper Oil Level in tank and System. Small variances can be expected
due to normal wear in the System and other environmental conditions. A System is not
considered to be overheating unless it significantly exceeds 100 degree F. over
ambient temperature. This is not to be measured by touching, use a temperature
measuring device to measure temperature to avoid being burnt.
4.
condition under which the Symptoms occur. For example, Ask if the Symptom has
existed for the life of the machine, has been gradually getting worse, or if it has occurred
suddenly. A sudden occurrence might indicate that foreign material entered the
system when work was being performed. Gradual worsening would indicate internal
leakage (Wear or Breakage). Symptoms that occur with specific operators would
indicate a possible operational problem. Symptoms that have been present for some
time could be any of the above problems.
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
Overheating of the Hydraulic System can have many individual causes. Before
Heat is produced anytime a Hydraulic System is working. Heat is generated
Alamo Industrial's Systems are designed to operate at approximately 100
When Discussing the Problem with a Customer, it is important to determine the
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