SDMO R33C3, User And Maintenance Manual

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8-12
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Cooling system - Clean
1.
Close coolant drain cocks and plugs.
2.
Pour in a cleaning solution (a solution that is non-
corrosive to rubber and metals) in the cooling sys-
tem, and operate the engine at 800 to 900 min -1 for
about 15 minutes, then drain the cleaning solution.
3.
Close coolant drain cocks and plugs.
4.
Pour in fresh water, and operate the engine at 800
to 900 min
-1
for about 10 minutes.
Repeat rinsing until the draining water becomes
clear and clean.
Fig. 8-19 Coolant drain plug (engine)
Coolant - Refill
1.
Tighten the coolant drain cocks and plugs.
2.
Remove the radiator filler cap, and pour in undilut-
ed LLC.
Note: Determine the amounts of LLC and water to be
added by using the LLC concentration chart.
For the coolant, refer to
"COOLANT" (6-1) . For
the coolant capacity, refer to "MAIN SPECIFICA-
TIONS" (12-1) .
3.
Pour in water (soft water with minimal impurities,
such as tap water) slowly to "FULL" level line.
4.
Check the radiator and other parts for coolant leak-
age. If any coolant leakage is found, repair it.
5.
When coolant reaches "FULL" level line, close the
radiator filler cap securely.
6.
Run the engine with starter for approx. 10 seconds
while pulling the stop lever.
Stop the operation for 1 minute, then, repeat the
operation two or three times to bleed the cooling
system.
7.
Check the coolant level in the radiator.
If the engine is equipped with a reserve tank, fill the
reserve tank with coolant to "FULL" level line as
well.
Fig. 8-20 Radiator coolant level
Fig. 8-21 Reserve tank
Clean the cooling system when operating the engine
first time, or restarting the engine after storage with
coolant drained.
Water drain plug
Always use the coolant with the same LLC concen-
tration.
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