53
•
Make sure that all cables are undamaged, externally and internally.
•
Using a multimeter check to see if the rocker switches are making the
proper connection. Extended use can cause the switches to malfunction
by either sticking or not making a connection.
8.4 Hydraulic
An apparent hydraulic problem can be due to an actual hydraulic problem or
a problem with the electrical system that controls the solenoid valves. Take
the following steps to determine the source of the problem.
•
Check to see that hydraulic oil is being supplied to the valve in the proper
direction, as the check valve may prevent oil from flowing through the
valve.
•
Check to see that all hydraulic quick couplers are properly connected.
•
Make sure that the hydraulic cylinders are not being prevented from
moving by a cylinder stop.
•
If your valve is equipped with a manual spool adjustment try to open the
valve manually. If you are able to change the boom height in this manner
the problem is electrical. If you cannot get any reaction the problem is
hydraulic.
•
If the boom raises when it should lower, and vice versa, and you have the
boom lift line connected to the B port, and the boom lower line
connected to the A port, check that the valve is not wired backwards
•
If the problem is hydraulic there may be an internal problem with the
valve itself. A sticking or worn valve may be the cause of the problem,
or a foreign object may be stuck in an internal port of the valve. The
problem may also be within the existing hydraulic network (e.g. faulty
oil pump).
•
If the problem is electrical check all cables and connectors between the
control panel and the valve. Check to see that the valve action arrows
appear on the screen. Measure the voltage at the valve. If the solenoid is
receiving voltage and no action is occurring the valve may need to be
replaced.
•
If the boom will not stay level or settles over long periods of time, check
for leaking cylinders. These symptoms may also occur if the solenoid
valves are beginning to wear. The use of a line lock will solve any
problems caused by valve leakage.
Summary of Contents for UC4 Total Control
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