Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
10-1
999 SERVICE/MAINTENANCE MANUAL
TROUBLESHOOTING
10
SECTION 10
TROUBLESHOOTING
INTRODUCTION
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
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 Model 999. 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 the
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 trouble-
shooting 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 the Model 999 Description of Operation in
Section 1 before beginning troubleshooting operations.
•
You must be a qualified service technician, competent in
the repair and testing of electrical and hydraulic
equipment. Manitowoc 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 for your
protection 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 communications with
this operator when performing operations that require
the crane to be running.
•
Do not return crane to service after completion of
maintenance or repair procedures until all guards and
covers have been re-installed, trapped air is bled from
hydraulic systems, safety devices are re-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 cannot foresee all hazards that may
occur.
You must 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!
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.
Pressurized hydraulic oil can cause serious injury. Turn off
engine, remove key, and relieve pressure on system
before disconnecting, adjusting, or repairing any
component.
Ensure that connections are made correctly, O-rings or
gaskets are in place, and connectors are tight before
pressurizing system.
Use necessary precautions to prevent electrical burns
when checking battery charging and starter circuits.
Death or serious injury can occur if these warnings are
ignored.
WARNING
Unexpected Moving Part Hazard!
Keep personnel away from crane while manually
actuating a valve or pump to avoid unexpected equipment
movement that can cause death or serious injury.
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...