Mitsubishi S4L User Manual

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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
ENGLISH
TROUBLESHOOTING OVERHAUL INSTRUCTIONS
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Key switch
faulty
Key not returning
completely
Overrun
Starter faulty
Broken return spring
Sticking
Machining fault of parts
Starter is energized for hours, resulting
in:
• Burned hold-in coil
• Burned armature and field coils
• Burned subswitch (if so equipped)
External obstacle
Rust due to moisture
Defective contact points
Problems in switch
Pull-in and hold-in coils
unbalance in number of
windings
Pull-in or hold-in coil layer
shorted
• Burned motor coil
• Burned pull-in and hold-in coils
(minor defect)
• Plunger fails to return when
voltage is applied to circuit
between M and (–) terminals and
plunger is pushed in with switch off
starter
Contact points defective Switch will not turn off only when engine
fails to fire, resulting in burning of motor
coil
• Burned motor coil
• Burned pull-in and hold-in coils
Plunger jammed
Machining fault of parts
Lever pivot jammed Dotted lines indicate failure of contact
points to close
Machining fault
Sliding part jammed
Sliding surface dirty
Machining fault of lead
Sticking pinion metal
Burned contact points
Assembly fault resulting in
failure to return
Burned hold-in coil and motor coil
External load connected to S circuit
S and B circuits shorted
Make reference to “Pull-in and hold-in
coil unbalance”
Make reference to “Key not returning
completely”
[Other possibility is sticking pinion metal in case of overrun trouble.]
Shift lever faulty
Overrunning clutch jammed
Subswitch faulty
Incorrect
wiring
Key not finished to close
tolerances

Mitsubishi S4L Specifications

General

Brand	Mitsubishi
Model	S4L
Category	Engine
Language	English