Operation and maintenance manual

94 SEBU8601-01
Maintenance Section
Cooling System Coolant (Commercial Heavy-Duty) - Change
g02350785
Illustration 51
Typ ical exam p le
2. Open the drain cock or remove the drain plug (1)
on the engine. Also, remove the drain plug (2).
Open the drain cock or remove the drain plug on
the radiator.
Allow the coolant to drain.
NOTICE
Dispose of used engine coolant or recycle. Various
methods have been proposed to reclaim used coolant
for reuse in engine cooling systems. The full distillation
procedure is the only method acceptable by Perkins to
reclaim the coolant.
For information regarding the disposal and the
recycling of used coolant, consult your Perkins dealer
or your Perkins distributor.
Flush
1. Flush the cooling system with clean water in order
to remove any debris.
2. Close the drain cock or install the drain plug in the
engine. Close the drain cock or install the drain
plug on the radiator.
NOTICE
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute, in order to avoid air locks.
Cooling system air locks may result in engine damage.
3. Fill the cooling system with clean water. Install the
cooling system filler cap.
4. Start and run th
e engine at low idle until the
temperature reaches 49 to 66 °C (120 to 150 °F).
5. Stop the engin
e and allow the engine to cool.
Loosen the cooling system filler cap slowly in
order to relieve any pressure. Remove the cooling
system filler
cap. Open the drain cock or remove
the drain plug on the engine. Open the drain cock
or remove the drain plug on the radiator. Allow
the water to
drain. Flush the cooling system with
clean water.
Fill
1. Close the dr
ain cock or install the drain plug on the
engine. Close the drain cock or install the drain
plug on the radiator.
NOTICE
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute, in order to avoid air locks.
Cooling system air locks may result in engine damage.
2. Fill the
cooling system with Commercial
Heavy-Duty Coolant. Add Supplemental Coolant
Additive to the coolant. For the correct amount,
refer t
o the Operation and Maintenance Manual,
“Fluid Recommendations” topic (Maintenance
Section) for more information on cooling system
specifi
cations. Do not install the cooling system
filler cap.
3. Start
and run the engine at low idle. Increase
the engine rpm to high idle. Operate the engine
in order to open the engine thermostat. This will
allow
any air in the system to be purged. Decrease
the engine speed to low idle. Stop the engine.
4. Main
tain the coolant level at the maximum mark
that is correct for your application.
g00103639
Illustration 52
Filler cap