8-11
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. 8-17 Coolant drain plug (engine)
Clean the cooling system when operating the engine
first time, or restarting the engine after storage with
coolant drained.
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