Maeda MC285C-3 - Electrical Components

M A E D A Mini-Crawler Crane Section 5 – TROUBLESHOOTING
1/2019 MC285C-3 5-89
Electrical Components
Problem
Major Cause(s)
Actions
No lights at highest engine speed
Defective wiring
*Check and repair loose terminals
and open circuits.
Lights blink during engine operation
Defective alternator
*Replace.
Defective wiring
*Check and repair.
Battery charge monitor remains on after
engine starts
Defective alternator
*Replace.
Defective wiring
*Check and repair.
Abnormal alternator noise
Defective alternator
*Replace.
Starter motor not rotating when Starter
Switch is turned to START
Defective wiring
*Check and repair.
Insufficient battery charge
Charge the battery.
Starter motor pinion moves in and out
repeatedly (struggling)
Insufficient battery charge
Charge the battery.
Starter motor turns slowly
Insufficient battery charge
Charge the battery.
Defective starter
*Replace.
Starter motor disengages before engine
starts
Defective wiring
*Check and repair.
Insufficient battery charge
Charge the battery.
A “slew detection abnormality” warning
appears on the monitor.
Detection abnormality due
to boom swaying
Operate the slewing operation
lever left and right.
Defective wiring
*Check and repair.
Improper limit switch
adjustment
*Adjust or replace.