Operation and maintenance manual

SEBU8601-01 99
Maintenance Section
Cooling System Water Temperature Regulator - Replace
4. Clean the cooli
ng system filler cap and inspect the
gasket. If the gasket is damaged, discard the old
filler cap and install a new filler cap. If the gasket
is not damaged
,useasuitablepressurizingpump
in order to pressure test the filler cap. The correct
pressure is stamped on the face of the filler cap. If
the filler cap
does not retain the correct pressure,
install a new filler cap.
i04020355
Coo ling Sy
stem Water
Temperature Regula tor -
Replace
Replace t
he water temperature regulator before
the water temperature regulator fails. This is a
recommended preventive maintenance practice.
Replaci
ng the water temperature regulator reduces
the chances for unscheduled downtime. Refer to this
Operation and Maintenance Manual, “Maintenance
Interva
l Schedule” for the proper maintenance
interval.
A water
temperature regulator that fails in a
partially opened position can cause overheating or
overcooling of the engine.
A water temperature regulator that fails in the closed
position can cause excessive o verheating. Excessive
overh
eating could result in cracking of the cylinder
head or piston seizure problems.
Awate
r temperature regulator that fails in the open
position will cause the engine operating temperature
to be too low during partial load operation. Low
engi
ne operating temperatures during partial loads
could cause an excessive carbon buildup inside the
cylinders. This excessive carbon buildup could result
in an
accelerated wear of the piston rings and wear
of the cylinder liner.
NOTICE
Failuretorep
lace your water temperature regulator
on a regularly scheduled basis could cause severe
engine damage.
Perkins engines incorporate a shunt design cooling
system and require operating the engine with a water
temperature
regulator installed.
If the water temperature regulator is installed incor-
rectly, the
engine may overheat, causing cylinder head
damage. Ensure that the new water temperature reg-
ulator is installed in the original position. Ensure that
the water te
mperature regulator vent hole is open.
Do not use liquid gasket material on the gasket or
cylinder h
ead surface.
Refer to two articles in the Disassembly and
Assemb ly
Manual, “Water Temperature Regulators
- Remove and Water Temperature Regulators -
Install” for the replacement procedure of the water
tempera
ture regulator, or consult your Perkins dealer
or your Perkins distributor.
Note: If
only the water temperature regulators are
replaced, drain the coolant from the cooling system to
a level that is below the water temperature regulator
housin
g.
i03634651
Crankshaft Vibration Dampe r
-Inspect
Viscous Damp er
The viscous damper has a inertia weight that is
locatedinsideafluid filled case. The inertia weight
moves in the case in order to limit torsional vibration.
Visually inspect the crankshaft damper. Ensure that
the cooling fins (1) on the crankshaft damper are
clean and free from dirt.