LUBRICATION AND PREVENTIVE MAINTENANCE INTERVALS
Figure 21 Typical Viscous
Vibration Damper
□
Viscous Damper:
Inspect damper
( see Figure 21) once a year.
Replace if dented or leaking. Heat
from normal engine operation
may, over a period of time,
cause the
fl
uid within the damper
to break down and lose its
dampening properties. For this
reason the viscous damper
must
be
replaced at time of normal major
engine overhaul, regardless of
apparent condition.
Welding Precaution
NOTICE:
Failure to isolate the electronic
engine control system
components from high current
fl
ow can result in severe ECM
(electronic control module)
damage.
To avoid damage to
vehicle electronic components,
disconnect both the positive (+)
and the negative (-) battery cables
prior to electric welding. Attach the
welder's ground cable as close as
possible to the joint being welded.
If it is necessary to weld close
to an electronic component, the
component should be temporarily
removed.
Whenever welding is done on any
part of the vehicle, the batteries
must
be disconnected, both power
and ground, which must include all
electronic power feeds. The electronic
components may easily be damaged
by the high voltage used and the RF
(radio frequency) energy present in
the arc.
72
All information subject to change without notice.
(Rev. May 2004)
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION