Yanmar 3JH4E Operation Manual page 58

PERIODIC MAINTENANCE
WARNING
!
Welding Hazard
Make welding repairs safely.
• ALWAYS turn off the battery switch (if
equipped) or disconnect the negative
battery cable and the leads to the
alternator when welding on the
equipment.
• Remove the multi-pin connector to the
engine control unit. Connect the weld
clamp to the component to be welded and
as close as possible to the welding point.
• NEVER connect the weld clamp to the
engine or in a manner which would allow
current to pass through a mounting
bracket.
• When welding is completed, reconnect
the leads to the alternator and engine
control unit prior to reconnecting the
batteries.
Exhaust Hazard
Avoid serious injury or death.
ALWAYS ensure that all
connections are tightened to
specifications after repair is
made to the exhaust system.
All internal combustion engines create
carbon monoxide gas during operation and
special precautions are required to avoid
carbon monoxide poisoning.
Shock Hazard
Avoid serious personal
injury or equipment
damage. ALWAYS turn
off the battery switch (if
equipped) or disconnect
the negative battery cable before servicing
the equipment.
Avoid personal injury or equipment damage.
ALWAYS keep the electrical connectors
and terminals clean. Check the electrical
harnesses for cracks, abrasions, and
damaged or corroded connectors.
52
NOTICE
Any part which is found defective as a result
of inspection, or any part whose measured
value does not satisfy the standard or limit,
must be replaced.
Modifications may impair the engine's
safety and performance characteristics and
shorten the engine's life. Any alterations to
this engine may void its warranty. Be sure to
use Yanmar genuine replacement parts.
JH4 Series Operation Manual