Manitowoc Published 07-19-16, Control # 249-01 10-1
2250 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
SECTION 10
TROUBLESHOOTING
BASIC TROUBLESHOOTING
This troubleshooting section is designed for qualified service
technicians familiar with the operation and repair of electrical
and hydraulic equipment. It is not possible to predict all
problems that might occur or the correct procedure for
troubleshooting each problem. If a problem is encountered
that is not covered in this manual, first consult your dealer.
The Manitowoc Crane Care Lattice Team can also provide
assistance if necessary.
The first part of this section provides a series of flow charts
that identify problems that could be encountered during
normal operation of the crane. These charts contain
instructions to assist in identifying and correcting problems.
Follow the procedural steps in the order indicated. Some
steps direct you to other charts in this manual or reference a
specific test that must be performed to move through the
complete troubleshooting procedure. If directed, consult your
dealer or the Manitowoc Crane Care Lattice Team before
proceeding.
The second part of this section contains specific instructions
for testing and servicing the various systems and
components described in the troubleshooting charts.
SAFETY SUMMARY
Hazards are always a possibility when performing
troubleshooting operations on heavy equipment. To
minimize the risk of potential hazards and to prevent serious
injury or death, you must comply with the following:
• Carefully read Crane Description of Operation in Section
1 before beginning troubleshooting operations.
• Troubleshooting operations must be performed by a
qualified service technician competent in the repair and
testing of electrical and hydraulic equipment. Manitowoc
Cranes shall not be responsible for the training of
personnel who might use this manual to perform the
troubleshooting operations.
• Whenever possible, turn off the engine and keep
unauthorized personnel away from the crane when
troubleshooting.
• Never troubleshoot the crane alone. Always perform
troubleshooting procedures with a qualified operator in
the crane cab. Maintain constant communication with
the operator when performing operations that require
the crane to be running.
• Do not return the crane to service after completion of
maintenance or repair procedures until all guards and
covers have been installed, trapped air is bled from the
hydraulic systems, safety devices are activated, and
maintenance equipment is removed.
• Perform a function check to ensure correct operation at
the completion of maintenance or repair operations.
The following warnings apply to all troubleshooting
operations. Manitowoc Cranes cannot foresee all hazards
that may occur.
You shall be familiar with the equipment, trained in testing
methods, and use common sense while troubleshooting to
avoid other hazards.
WARNING
Eye, Skin, and Respiratory Hazards!
Death or serious injury may occur from contact with
hydraulic oil that is under pressure.
Observe the following to prevent death or serious injury:
• Turn off the engine, remove the key, and relieve the
pressure on the system before disconnecting,
adjusting, or repairing any component.
• Wear proper eye and skin protection and avoid direct
contact with battery acid, oil, or ether spray when
searching for leaks, opening connections, or installing
pressure gauges.
• Ensure that connections are made correctly, O-rings
or gaskets are in place, and connectors are tight
before pressurizing the system.
• Use necessary precautions to prevent electrical
burns when checking the battery charging and starter
circuits.
WARNING
Unexpected Moving Part Hazard!
There is sometimes unintended operation of the machine
when manually activating valves or pumps. This
unexpected movement can cause death or serious injury.
Keep personnel away from the crane while manually
actuating a valve or pump.
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