MACHINE OPERATIONS AND CONTROLS OPERATION
3-168
When draining the oil, use either drain plugs (P1) and (P2) at
the bottom of the hydraulic tank or drain plugs (P3) at the bot-
tom of the hydraulic sub tank.
q When using drain plugs (P1) and (P2) at bottom of hydrau-
lic tank
Loosen drain plug (P1), then loosen plug (P2) and drain
the oil. After draining the oil, tighten drain plugs (P1) and
(P2).
q When using drain plugs (P3) at bottom of hydraulic sub
tank
Loosen 2 drain plugs (P3) at the bottom of the hydraulic
sub tank and drain the oil. The outlet port for draining the
oil is drain tube (B). When draining the oil, be careful not to
get oil over yourself. After draining, tighten 2 drain plugs
(P3).
Even though the oil is at the correct level, when the machine is in the following posture, “Abnormal Hydraulic Oil
Level“ may be displayed, but this causes no problem for operation.
q When starting a machine off from the stopped posture with
boom cylinder fully extended
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