Maeda MC405C-3 - TROUBLESHOOTING

Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A
5-88 1/2019 MC405C-3
TROUBLESHOOTING
General
• Make sure that you contact us or our sales service agency for the actions indicated in parentheses in
the Actions field.
• Contact our sales service agency if you suspect other abnormality or causes than those given below.
Machine Body
Problem
Major Cause(s)
Actions
Crane cannot operate but
can travel
• Work selector switch not at
"Crane"
• Operate the work selector
switch to "Crane"
• Travelling speed, boom and
hook block operation speed
too slow
• Abnormal noise from pump
• Insufficient hydraulic oil
• Hydraulic oil tank strainer and
element clogged
• See "Check / Add Hydraulic
Oil" on page 5-27 and refill with
hydraulic oil to the specified oil
level
• See "Periodic Maintenance
Procedure" on page 5-40, and
clean or replace the filter
Hydraulic oil temperature too
high
• Insufficient hydraulic oil
• Between cooling fins clogged
• See "Check / Add Hydraulic
Oil" on page 5-27 and refill with
hydraulic oil to the specified oil
level
• Clean
• Rubber tracks coming off
• Abnormal wear on the
sprockets
• Rubber tracks too loose
• See "Check / Adjust Rubber
Track Tension" on page 5-31
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 "Travel"
• Operate the work selector
switch to "Outrigger" or "Crane"
Engine
Problem
Major Cause(s)
Actions
Engine does not start even after the
starter key is turned
• Insufficient fuel
• Insufficient battery
charge
• Insufficient compression
• See "Check / Add Fuel" on
page 5-26 and refuel
• Charge the battery
(• Check and replace)
Engine starts but stops right away
• Insufficient oil in oil pan
• See "Check / Add Engine Oil"
on page 5-25 and adjust oil
level to appropriate one
• See causes and actions for
"Engine does not start"
Engine power is low, the power
gradually drops
• Air cleaner element
clogged
• Radiator fin clogged
• Insufficient compression
• See "Inspection, Cleaning and
Replacement of Air Cleaner" on
page 5-72 and clean or replace
the parts
• Clean
(• Check and replace)