8-17
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 the above rinsing steps until the draining
water becomes clear and clean.
Fig. 8-22 Coolant Drain Cock (Water Pump)
Coolant - Refill
1.
Close coolant drain cocks and plugs firmly.
2.
Open the coolant filler and add a mixture of water
and coolant having the specified concentration.
Note: Determine the amounts of LLC and water to be
added by using the LLC concentration chart.
For the coolant, refer to
the coolant capacity, refer to
3.
Check the heat exchange equipment and other
parts for coolant leaks. If a coolant leak is found, re-
pair it.
4.
When coolant reaches the full level, close the cool-
ant filler securely.
5.
While pulling the manual stop lever, rotate the
crankshaft for approx. 10 seconds using the starter.
Stop the operation for 1 minute, then, repeat the
operation two or three times to bleed the cooling
system.
Note: Prepare for the engine oil system.
6.
Check the level of coolant.
Clean the cooling system when operating the engine
or heat exchange equipment first time, or restarting
the engine after storage with coolant drained.
Coolant drain cock
(Water pump)
Always use the coolant having the same concentra-
tion.
