Maeda MC-305C-2 - Machine Body

3-120
9.2 MACHINE BODY
• Make sure that you contact us or our sales service agency for the actions indicated in parentheses in the
Actions field.
• Ask our sales service agency for repair if you suspect other abnormality or causes than those given
below.
Abnormal Phenomenon Major Cause(s) Actions
Crane cannot operate but can travel
• Work selector switch not
at “CRANE”
• Operate the work selector switch
to “CRANE”
• Traveling speed, boom and hook
block operation speed too slow
• Abnormal noise from pump
• Insufficient hydraulic oil
• Hydraulic oil tank strainer
and element clogged
• Refill with hydraulic oil to the
specified oil level, referring to the
section “Check before operation”
• Clean and replace the filter by
referring to the “Periodical
Checks”.
Hydraulic oil temperature too high
• Insufficient hydraulic oil
• Between cooling fins
clogged
• Refill with hydraulic oil to the
specified oil level, referring to the
section “Check before operation”
• Clean
• Rubber tracks coming off
• Abnormal wear on the sprockets
• Rubber tracks too loose
• See “Check before operation”
and adjust the tension
Outriggers cannot operate
• Outrigger rotary not
rotated to extension
position (outward).
• Work selector switch not
at “OUTRIGGER”
• Secure the rotary at the
extension position
• Operate the work selector switch
to “OUTRIGGER”
Crane and outriggers cannot operate
• Work selector switch at
“DRIVE”
• Operate the work selector switch
to “OUTRIGGER” or “CRANE”