Perkins 904D-E28T, Руководство по эксплуатации и обслуживанию, Страница: 66 / 110

Perkins recommends a 50 percent volume glycol and
distilled or deionized water of the correct
specification. This mixture will provide optimum
performance as a coolant/antifreeze.
Distilled or deionized water is preferred. Water which
has the recommended properties may be used.
Table 11
Coolant Service Life
Coolant Type Service Life (1)
Required
Maintenance
Commercial
Heavy-Duty Anti-
freeze that meets
“ASTM D6210”
3000 Service Hours
or Two Years
SCA at maintenance
intervals
Commercial
Heavy-Duty Anti-
freeze that meets
“ASTM D4985”
3000 Service Hours
or One Year
SCA at initial fill and
SCA at maintenance
intervals
Perkins ELC
6,000 Service Hours
or Three Years
-
(1) Use the interval that occurs first. The cooling system must also
be flushed out at this time. These service lives can only be met
if regular coolant sampling, analysis, and proper maintenance
are carried out, with the engine in normal service.
ELC
Perkins provides ELC for use in the following
applications:
• Heavy-duty spark ignited gas engines
• Heavy-duty diesel engines
• Automotive applications
The anti-corrosion package for ELC is different from
the anti-corrosion package for other coolants. ELC is
an ethylene glycol base coolant. However, ELC
contains organic corrosion inhibitors and antifoam
agents with low amounts of nitrite. Perkins ELC has
been formulated with the correct amount of these
additives to provide superior corrosion protection for
all metals in engine cooling systems.
ELC is available in a premixed cooling solution with
distilled water. ELC is a 50 percent by volume of
glycol mixture. The Premixed ELC provides freeze
protection to −36 °C (−33 °F). The Premixed ELC is
recommended for the initial fill of the cooling system.
The Premixed ELC is also recommended for topping
off the cooling system.
Containers of several sizes are available. Consult
your Perkins distributor for the part numbers.
ELC Cooling System Maintenance
Correct additions to the Extended Life
Coolant
NOTICE
Mixing Extended Life Coolant with other products re-
duces the Extended Life Coolant service life. Failure
to follow the recommendations can reduce cooling
system components life unless appropriate corrective
action is performed.
To maintain the correct balance between the
antifreeze and the additives, you must maintain the
recommended concentration of ELC. Lowering the
proportion of antifreeze lowers the proportion of
additive. Lowering the ability of the coolant to protect
the system will form pitting, from cavitation, from
erosion, and from deposits.
NOTICE
Do not use a conventional coolant to top-off a cooling
system that is filled with Extended Life Coolant
(ELC).
Do not use Supplemental Coolant Additive (SCA).
Do not use ELC in systems with SCA filters. When
switching from conventional coolant to ELC in a sys-
tem equipped with SCA filter, remove the filter from
the system to prevent ELC contamination and filter
corrosion and leaks.
ELC Cooling System Cleaning
Note: If the cooling system is already using ELC,
cleaning agents are not required to be used at the
specified coolant change interval. Cleaning agents
are only required if the system has been
contaminated by the addition of some other type of
coolant or by cooling system damage.
Distilled or deionized water is the only cleaning agent
that is required when ELC is drained from the cooling
system.
Before the cooling system is filled, the heater control
(if equipped) must be set to the HOT position. Refer
to the OEM to set the heater control. After the cooling
system is drained and the cooling system is refilled,
operate the engine until the coolant level reaches the
normal operating temperature and until the coolant
level stabilizes. As needed, add the coolant mixture
to fill the system to the specified level.
Changing to Perkins ELC
To change from heavy-duty antifreeze to the Perkins
ELC, perform the following steps:
66 M0108133-04
Maintenance Section
Fluid Recommendations