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Basic Trouble Shooting Guide &
needed Liftmoore is here to help. Locate your crane’s serial # and
give us a call at 713-688-5533
This information covers basic
procedures and information needed to aid you in trouble shooting and
understanding issues with your crane.
If nothing works, first
check for battery voltage and/or hydraulic power below the crane. Second
check the pendant control connection and that it has voltage and is
sending signals to the valves or relays.
What functions do not
work on the crane? What functions are working? Check every function
when something is not working. This will determine whether or not a
safety circuit is tripped.
Manual override features
are located on all hydraulic valves. The button is located on the end
of the valves and may be pushed or pulled to operate the valve. On
electric cranes the pump must be working before operating the valve
manually. Locate the function that is not working and check it manually.
If it works manually the problem is electrical, not hydraulic.
All DC powered Cranes
must have good voltage with adequate battery reserve to function. A Bad
or Weak Battery will not allow the crane to operate as it is intended.
Loose or bad connections are the same as having a bad battery.
Always use a Volt Meter
(Multi-Meter) when checking the crane. A Test Light may not give you the
information needed. A test light may continue to burn even though the
voltage is too low. The crane’s voltage when running must be above 11.5
The crane must be running
when voltage is measured. There may be adequate voltage before
operating the crane but it will decrease as it is running. Voltage
readings below 11.5 VDC are not adequate. At lower Voltages Amperage
draw will increase and motors and solenoids will heat up rapidly under
The cause of most
failures of Hydraulic Systems is trash or impurities in the oil. This
is especially true of new cranes. Liftmoore provides an adapter fitting
with all hydraulic cranes. This allows the pressure return hoses to be
plumbed together and the system run to circulate the oil. Typically 5-10
minutes run time will allow the return line filter to clean any
impurities from the Reservoir, Hoses & Fittings. Doing this
recirculation will insure a good working crane with no issues.
When was the oil last
changed? Oil will deteriorate over time as impurities or condensation
enter the system. Keep the reservoir as full as possible to reduce the
amount of condensation that will enter the system.
All Liftmoore cranes are
provided with a means of disconnecting the crane from the battery power
source. Failure to use the crane disconnect will result in corrosion,
bad connection's and a shorter life of all components. Both DC Powered
Crane's and Hydraulic Crane's must be turned off when not in use.
shipment all cranes are run and checked for functionality. All cranes
pass a performance test before shipping. Your Crane is designed for
years of safe, trouble free operation. Insure yourself that you get the
performance you expect by applying the simple yet important items
covered above and in your owner’s manual.
Need an Owner's Manual?
Contact us with your Serial # and e-mail address and we will send you
If it is a newly purchased crane contact your
Distributor and let them know that your manual is missing.
above Links or those below will take you to a help page based on the
type of crane you have.