Perkins 1706EA-E93TA Operation And Maintenance Manual page 102

102
Maintenance Section
Cooling System Water Temperature Regulator - Replace
4. Clean the cooling 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, use a suitable pressurizing pump 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.
Cooling System Water
Temperature Regulator -
Replace
Replace the water temperature regulator before the
water temperature regulator fails. Replacing the
water temperature regulator is a recommended
preventive maintenance practice. Replacing the
water temperature regulator reduces the chances for
unscheduled downtime. Refer to this Operation and
Maintenance Manual, "Maintenance Interval
Schedule" for the correct 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 overheating. Excessive
overheating could result in cracking of the cylinder
head or piston seizure problems.
A water temperature regulator that fails in the open
position will cause the engine operating temperature
to be too low during partial load operation. Low
engine operating temperatures during partial loads
could cause an excessive carbon buildup inside the
cylinders. This excessive carbon buildup could result
in accelerated wear of the piston rings and wear of
the cylinder liner.
NOTICE
Failure to replace your water temperature regulator
on a regularly scheduled basis could cause severe
engine damage.
Perkins engines incorporate a shunt bypass 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 tempera-
ture regulator is installed in the original position. En-
sure that the water temperature regulator vent hole is
open.
Do not use liquid gasket material on the gasket or cyl-
inder head surface.
Refer to two articles in the Disassembly and
Assembly Manual, "Water Temperature Regulators -
Remove and Water Temperature Regulators - Install"
for the correct replacement procedure of the water
temperature regulator, or consult your Perkins dealer.
Note: If the water temperature regulators are
replaced, drain the coolant from the cooling system
to a level that is below the water temperature
regulator housing.
i07227862
DEF Filler Screen (Emission
Related Component) - Clean
Ensure that the engine is stopped before any servic-
ing or repair is performed.
Illustration 87
Typical example
1. Ensure that the area around cap on the Diesel
Exhaust Fluid (DEF) tank is clean. Remove cap
(1).
2. Using a suitable tool, press the tabs (2) to release
the tabs. With the tabs released remove the filter
screen (3) from DEF tank neck adapter (4).
M0087475-06
i07297210
NOTICE
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