3-5
Chapter 3 OPERATION
Preparation of Cooling System
Radiator Cap - Open/Close
Note: If the specification of radiator differs from the
contents of this operation manual, follow the
manufacturer's operation manual.
Fig. 3-8 Radiator Cap
Coolant - Refill
1.
Close the coolant drain cock of engine and water
pump securely.
2.
Open the coolant filler and add a mixture of water
and coolant having the specified concentration.
Note: (a) Determine the quantities of LLC based on the
coolant capacity and the LLC concentration
chart.
.
For the coolant capacity, refer to
.
(b) For absolute air bleeding, loosen the air vent
plug on the upper section of thermostat.
3.
Check the heat exchange equipment and other
parts for coolant leaks. Repair leakage if found.
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 start-
er.Stop the operation for approx. 1 minute, then, re-
peat the operation two or three times to bleed the
cooling system.
Note: Prepare for the engine oil system.
6.
Check the level of coolant.
Fig. 3-9 Coolant Drain Cock (Engine)
Fig. 3-10 Coolant Drain Cock (Water Pump)
When using the engine with radiator cooling system,
remove the radiator cap only after the engine has
cooled to the room temperature. Place a waste cloth
over the cap, and loosen the cap about a half-turn or
stand the lever to the upright position to release inter-
nal pressure. Opening the radiator cap of coolant
expansion tank while the engine is hot causes steam
and hot coolant to blow out and can result in skin
burns.
Turn the cap about
half a turn
Stand the lever to
the upright position
Always use the coolant having the same concentra-
tion.
Coolant drain cock
Coolant drain cock
(Water pump)
