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WEBM1000 Maintenance Section (D6T LGP (OEM))
Maintenance Support
Maintenance Support
Welding on Machines and
Engines with Electronic
Co
ntrols
Do not weld on any protective structure. If it is
necessary to repair a protective structure, contact
your Caterpillar dealer.
Proper welding procedures are necessary in order to
avoid
da
mage to the electronic controls and to the
bearings. When possible, remove the component
that must be welded from the machine or the engine
and then weld the component. If you must weld near
an electronic control on the machine or the engine,
temporarily remove the electronic control in order to
prevent heat related damage. The following steps
should be followed in order to weld on a machine or
an engine with electronic controls.
1. T
urn off the engine. Place the engine start switch
in the OF
F position.
2. If equipped, turn the battery disconnect switch to
the O
FF position. If there is no battery disconnect
switch, remove the negative battery cable at the
battery.
NOTICE
Do NOT use electrical components (ECM or
sensors) or
electronic component grounding points
for grounding the welder.
3. Clamp the ground cable from the welder to the
component that will be welded. Place the clamp
as close as possible to the weld. Make sure that
the electrical path from the ground cable to the
component does not go through any bearing.
Use this procedure in order to reduce the
possibility of damage to the following
components:
• Bearings of the drive train
• Hydraulic components
• Electrical components
• Other components of the machine
4. Pr
otect any wiring harnesses and components
from
the debris and the spatter which is created
from welding.
5. Use
standard welding procedures in order to
weld the ma
terials together.
Severe Service Application
An engine which operates outside of normal
conditions is operating in a severe service
application.
An engine that operates in a severe service
applic
ation
may need more frequent maintenance
intervals in order to maximize the following
conditions:
• Reliability
• Service life
The number of individual applications cause the
impossibility of
identifying all
of the factors which
may contribute to severe service operation. Consult
your Caterpillar dealer for the unique maintenance
that may be necessary for your engine.
An application is a severe s
ervice application if
any
of the following conditions apply:
Severe Environmental Factors
• Frequent operation in dirty air
• Frequent operation at an altitude which is above
1525 m (5
000 ft)
• Frequent operation in ambient temperatures which
are abov
e 32 C (90 F)
• Frequent operation in ambient temperatures which
are below 0 C
(32 F)
Severe Operating Conditions
• Frequent operation with inlet air which has a
corrosive content
• Operation with inlet air which has a combustible
content
•
Operation which is outside of the intended
application
• Operation with a plugged fuel filter
• Extended operation at low idle (more than 20% of
hours)
• F
requent cold starts at temperatures below 0 C
(32 F)
• Frequent dry starts (starting after more than 72
hou
rs of
shutdown)