Maeda MC815C, Operation Manual, Page: 243 / 426

233
11.2 MACHINE BODY
• Make sure that you contact us or our sales service agent for the actions marked with in the
table.
• Ask us or our sales service agency for repair if you suspect any other abnormalities or causes
than those given below.
Abnormal Phenomenon Major Cause(s) Remedy
Crane cannot be operated at all
but can travel
• Mode selector switch is
not set to “Crane”.
• No outrigger is
deployed.
• Set mode selector switch
to “Crane”.
• Deploy outriggers.
• Travelling speed, boom and hook
block operation speed too slow
• Abnormal noise from pump
• Insufficient hydraulic
oil
• Clogging in the
hydraulic oil tank
strainer and element
• Refill with hydraulic oil to
the specified oil level,
referring to the section
“Check before operation”
• Clean and replace the
strainer and element
according to periodic
inspection.
Hydraulic oil temperature too high
• Insufficient hydraulic
oil
• Dust build-up on
cooling fins
• Refill with hydraulic oil to
the specified oil level,
referring to the section
“Check before operation”
• Cleaning
• Crawler belt comes off.
• Abnormal wear on the sprockets
• Crawler belt too loose.
• See “Check before
operation” and adjust the
tension
Outriggers cannot be operated.
• Mode selector switch is
not set to “Outrigger”.
• Crane is not stowed.
• Set mode selector switch
to “Outrigger”.
• Stow crane.
Crane or outrigger cannot be
operated.
• Mode selector switch is
set to any option other
than “Crane” and
“Outrigger mode”. • Set mode selector switch
to “Crane” or “Outrigger”.