Perkins 1106AA-70TG1 Operation And Maintenance Manual page 53

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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.
Note: Refer to Operation and Maintenance Manual,
"General Hazard Information" for information on
Containing Fluid Spillage.
Illustration 25
Cylinder block coolant drain plug location
2. Remove drain plug (1) on the engine. Open the
drain cock or remove the drain plug on the
radiator.
Allow the coolant to drain into a suitable container.
Cooling System Coolant (Commercial Heavy-Duty) - Change
3. Properly dispose of the drained material. Obey
local regulations for the disposal of the material.
Flush
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 clean water and a
suitable cleaning agent to remove any debris.
Refer to your Perkins dealer or distributor for
suitable cleaning agents.
2. Clean the drain plugs. Install the drain plugs.
Tighten drain plug 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 clean water and install
the cooling system filler cap.
4. Start and run the engine at low idle for a minimum
of 30 minutes. The coolant temperature should be
at least 82 °C (180 °F).
Improper or incomplete rinsing of the cooling system
can result in damage to copper and other metal
components.
To avoid damage to the cooling system, make sure to
completely flush the cooling system with clear water.
Continue to flush the system until all signs of the
cleaning agent are gone.
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 or remove
the cooling system drain plugs. Allow the water to
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drain. Flush the cooling system with clean water.
Install the connection hose.
Maintenance Section
NOTICE
NOTICE
NOTICE
53