Maeda MC405C-3 - Electrical Components

Mini-Crawler Crane M A E D A Section 5 – TROUBLESHOOTING
1/2019 MC405C-3 5-89
Problem
Major Cause(s)
Actions
Engine water temperature monitor
illuminates while the engine is in
operation
• Insufficient Coolant
• Water leakage from the
cooling line
• Slackened or broken fan
belt
• Radiator fin clogged
• See "Check / Add Engine
Coolant" on page 5-24 and refill
with coolant
(• Check and repair)
• See "Check / Adjust Belt
Tension" on page 5-44 to
check, adjust, or change the
belt
• Check and clean
Engine oil pressure monitor
illuminates while the engine is in
operation
• Insufficient engine oil
• Engine oil filter clogged
• Engine unit in failure
• See "Check / Add Engine Oil"
on page 5-25 and adjust oil
level to appropriate one
• See "Replace Engine Oil and
Oil Filter" on page 5-46 to
check, adjust, or change the
filter
(• Check and repair)
Electrical Components
Problem
Major Cause(s)
Actions
Dark light even at highest
engine speed
• Defective wiring
(• Check and repair slackened
terminals and open circuits)
Light blinks during engine
operation
• Defective alternator
• Defective wiring
(• Replace)
(• Check and repair)
Battery charge monitor
remains illuminated even
after the engine starts
• Defective alternator
• Defective wiring
(• Replace)
(• Check and repair)
Abnormal noise from
alternator
• Defective alternator
(• Replace)
Starter not rotating even after
the starter switch is turned
• Defective wiring
• Insufficient battery charge
(• Check and repair)
• Charge the battery
Starter pinion going out and
in repeatedly (struggling)
• Insufficient battery charge • Charge the battery
Starter key turning slow
• Insufficient battery charge
• Defective starter
• Charge the battery
(• Replace)
Starter disengaged before
the engine starts
• Defective wiring
• Insufficient battery charge
(• Check and repair)
• Charge the battery