General Mentenance; Cooling System; Checking The Coolant Level - Shibaura ST450 Operator's Manual

COOLING SYSTEM

The tractor engine must operate at the correct
temperature to obtain maximum efficiency and
service life. This is dependent on the cooling
system. Always fill the system with a 50/50
solution of ethylene glycol antifreeze and water.

Checking the Coolant Level

NOTE: Check the coolant level daily or after
every 10 hours of operation. The engine should
be cold when coolant level is checked.
1. Visually inspect the coolant level in the over
flow tank (1) in Figure 3-21.
WARNING
The cooling system operates under pressure
controlled by the radiator cap. It is dangerous
to remove the cap while the system is hot.
Always cover the cap with a thick cloth and
turn it slowly counter-clockwise to the first
stop. Allow all pressure to escape before
removing the cap completely.
2. If the coolant level is below the cold level line
(2) in Figure 3-21, remove overflow tank cap
(3) in Figure 3-21, add a 50/50 solution of
ethylene glycol anti-freeze and water solution
as necessary. Plain water will dilute the
solution and weaken its protection.
3. Remove the two wing nuts that retain the front
radiator screen and slide the screen (4) in
Figure 3-22, out the left side of the tractor.
4. Keep the radiator fins (5) in Figure 3-23, clear
of chaff or dirt to allow free air movement.
5. HST transmission only, there is an oil cooler
(6) in Figure 3-23, located in front of the
radiator and underneath air cleaner. Keep fins
of cooler clean of any buildup of material, so
that transmission oil can be cooled.
SECTION 3 – LUBRICATION AND MAINTENANCE
GENERAL MAINTENANCE
3-16
Figure 3-21
Figure 3-22
Figure 3-23