Specifications

SEBU7858-03 123
Maintenance Section
Crankshaft Vibration Damper - Inspect
3. Remove the turb
ocharger water line from the
cover assembly.
4. Clean the area
around the water temperature
regulator housing.
5. Remove the bo
lts from the water temperature
regulator housing and remove the water
temperature regulator housing.
6. Remove the water temperature regulator from the
water temperature regulator housing. Remove
the gasket f
rom the water temperature regulator
housing. Remove the seal from the water
temperature regulator housing.
NOTICE
The water temperature regulators may be reused if the
water temperature regulators are within test specifica-
tions, ar
e not damaged, and do not have excessive
buildup of deposits.
NOTICE
It is mandatory to always operate the engine with a wa-
ter temperature regulator. Depending on load, failure
to oper
ate with a water temperature regulator could
result in either an overheating or an overcooling con-
dition.
NOTICE
If the water temperature regulator is installed incor-
rectly, it will cause the engine to overheat.
7. Install a new seal in the water temperature
regulator housing. Install a new water temperature
regulator and a new gasket. Install the
water temperature regulator. Install the water
temperature regulator housing.
8. Install the turbocharger water line and the hose.
Tighten the hose clamp.
9. Add the cooling system coolant.
Note: The radiator is full when the sight gauge is
completely covered. Also, the radiator is full when
the coolant level reaches the top of the angled cut on
the filler tube. Refer to Operation and Maintenance
Manual, “Cooling System Coolant Level - Check”.
i02469814
Crankshaft Vibration Dampe r
-Inspect
SMCS Code: 1205-040
Damage to the crankshaft vibration damper or failure
of the crankshaft vibration damper will increase
torsional v
ibrations. These vibrations will result
in damage to the crankshaft and to other engine
components. A deteriorating vibration damper will
cause exces
sive gear train noise at variable points
in the speed range.
The damper
is mounted to the crankshaft which is
located behind the belt guard on the front of the
engine.
Caterpillar recommends replacing the vibration
damper for any of the following reasons:
•
The engine has had a failure because of a broken
crankshaft.
•
The S·O·S oil analysis detected a worn crankshaft
front bearing.
•
The S·O·S oil analysis detected a large amount of
gear train wear that is not caused by a lack of oil.
•
Fluid leakage is detected during inspection.
•
The hou
sing is damaged.
Refer to Disassembly and Assembly, “Crankshaft
Vibra
tion Damper and Pulley - Remove and Install”
for the procedure to remove the damper and for the
procedure to install the damper.
The vibration damper can be used again if none of
the above conditions are found or if the vibration
damp
er is not damaged.
Consult your Caterpillar dealer for more information
abou
t damper replacement.