Maeda MC285C-3 - TROUBLESHOOTING

M A E D A Mini-Crawler Crane Section 5 – TROUBLESHOOTING
1/2019 MC285C-3 5-87
TROUBLESHOOTING
The following troubleshooting charts and procedures are provided to assist in diagnosing problems in the
event of a malfunction or failure.
Contact us or our sales service agency to request inspection and repair services as indicated with a * in
the Actions column, or if you suspect other problems or causes than those given below.
Machine Body
Problem
Major Cause(s)
Actions
Crane and outriggers do not operate
but machine travels
Travel lever not in
Crane/Outrigger position
Move travel lever to
“Crane/Outrigger”.
Travelling speed, boom and hook
block operation speed slow or
abnormal pump noise
Low hydraulic oil level
Fill hydraulic oil to specified level.
See “Check / Add Hydraulic Oil”
on page 5-23.
Hydraulic oil tank strainer and
element clogged
Clean and replace filter. See
“Replace Hydraulic Oil Return
Filter” on page 5-42.
Hydraulic oil temperature high
Low hydraulic oil level
Fill hydraulic oil to specified level.
See “Check / Add Hydraulic Oil”
on page 5-23.
Clog between cooling fins
Clean oil cooler.
Rubber tracks fall off or abnormal
wear of sprockets
Rubber tracks loose
Adjust track tension. See
“Checking Rubber Track Tension”
on page 5-61.
Outriggers do not operate
Outrigger not rotated to
EXTENSION position
(outward)
Secure the outrigger at the
EXTENSION position.
Travel lever not in
Crane/Outrigger position
Move travel lever to
“Crane/Outrigger”.
Boom is not in stow position
Set (operate) boom in stow
position.
Crane does not operate
Outriggers are not in setting
position
Set (operate) all four outriggers.