Perkins 904D-E28T Operation And Maintenance Manual page 83

M0108133-04
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.
1. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap.
Illustration 40
Typical example
2. Remove drain plug (1) on the engine. Open the
drain cock or remove the drain plug on the radiator
and allow the coolant to drain.
For information regarding the disposal and the
recycling of used coolant, consult your Perkins dealer
or Perkins distributor.
Flush
NOTICE
Cleaning agents for an industrial cooling system must
not be used. These cleaning agents are very aggres-
sive and cause damage to the cooling system
components.
1. Flush the cooling system with distilled or deionized
water to remove any debris.
2. Install the connection hose. Clean the drain plugs
and install the drain plugs. Tighten the drain plugs
securely.
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute to avoid air locks.
Cooling system air locks may result in engine
damage.
3. Fill the cooling system with distilled or deionized
water. Install the cooling system filler cap.
4. Start and run the engine at low idle until the
temperature reaches 50° to 70°C (122° to 158°F).
5. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap. Remove the connection hose and
remove the cooling system drain plugs. Allow the
water to drain. Flush the cooling system with clean
water. Install the connection hose.
6. Install the drain plugs and securely.
Fill
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute to avoid air locks.
Cooling system air locks may result in engine
damage.
1. Fill the cooling system with Extended Life Coolant
(ELC). Refer to this Operation and Maintenance
g06302798
Manual, "Refill Capacities" topic (Maintenance
Section) for more information on cooling system
specifications. Do not install the cooling system
filler cap.
2. Start and run the engine at low idle. Increase the
engine rpm to high idle. Operate the engine to
open the engine thermostat. An open thermostat
will allow any air in the system to be purged.
Decrease the engine speed to low idle. Stop the
engine.
3. Maintain the coolant level at the maximum mark
that is correct for your application.
Maintenance Section
Coolant (ELC) - Change
NOTICE
NOTICE
83