Fiat Kobelco EX355 Tier2, Техническое руководство

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EX355 T5-4-35
TROUBLESHOOTING B
A-3 During Single Operation, Right Side Track
and Bucket are Slow but Left Side Track and
Swing are Normal.
(These symptoms appear at the same time.)
Related Fault Code: None
Checking Instructions
•
Due to some reasons, pump 1 flow rate is reduced to
the minimum (approx. 20 L/min). Accordingly, right
side track and bucket function speeds are too slow
as they are actuated by pressure oil from pump 1.
•
Arm and boom cylinders are actuated by pressure
oil from both pump 1 and pump 2 so that their
function speeds are slightly reduced during a single
operation.
•
Refer to “Control Valve” and “Pump Device” groups
in COMPONENT OPERATION Section in the Op-
erational Principle book (Technical Manual).
NO
YES
Check if fault
code is displayed.
Check if pump
control pipe lines
are correctly
connected.
Referring to the
displayed fault
code, check
suspected parts.
NO
YES
Reconnect
correctly.
NO
YES
Monitor pump
control pressure
by operating
control lever.
Check if pump
control pressure
increases.
Faulty pump
control valve (4
spool side).
Check pump 1
regulator.
•
Bucket or travel right.
•
Monitor item:
Pump 1 Control Pressure