Perkins 403EA-11, Руководство по эксплуатации и обслуживанию, Страница: 82 / 114

7.
Start the engine. Inspect the cooling system for
leaks and for correct operating temperature.
i05160120
Coolant Temperature
Regulator - Replace
Replace the water temperature regulator before the
water temperature regulator fails. This is a
recommended preventive maintenance practice.
Replacing the water temperature regulator reduces
the chances for unscheduled downtime.
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 an 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 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 the Disassembly and Assembly Manual,
“Water Temperature Regulator - Remove and Install”
for the replacement procedure of the water
temperature 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 housing.
i08673399
Coolant (Commercial Heavy-
Duty) - Change
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to Local regulations
and mandates.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
Clean the cooling system and flush the cooling
system before the recommended maintenance
interval if the following conditions exist:
• The engine overheats frequently.
• Foaming is observed.
• The oil has entered the cooling system and the
coolant is contaminated.
• The fuel has entered the cooling system and the
coolant is contaminated.
Note:
When the cooling system is cleaned, only
clean water is needed.
Note:
Inspect the water pump and the water
temperature regulator after the cooling system has
been drained. During this maintenance procedure,
consider replacing the water pump, the water
temperature regulator, and the hoses, if necessary.
Drain
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the
pressure.
82 M0132847
Maintenance Section
Coolant Temperature Regulator - Replace