n ine S ste
iesel
8
Service Manual – SC8000
e lacin n ine
Coolant
One possible cause of engine overheating is trapped air in the cooling system. It’s recommended that you use
a Cooling System Tool when changing the engine coolant. The Cooling System Tool pulls a vacuum on the
FRROLQJV\VWHPSULRUWRÀOOLQJWRSUHYHQWDLUIURPEHLQJWUDSSHGLQWKHFRROLQJV\VWHP
Note that there are several types of Cooling System Tools. The following instructions describe how to use a
typical type of tool. Refer to the operating instructions included with your particular tool if different than the
H[DPSOHVKRZQKHUH
1. Connect
a
Compressed Air Supply Line
WRWKHÀWWLQJRQWKH&RROLQJ6\VWHP
Tool.
2. Connect
the
Coolant Supply Line
to the
Cooling System Tool. Make sure the
Coolant Valve
is closed.
3. Insert and hold the Cooling System
7RRORQWRWKHUDGLDWRUÀOOHUQHFNWKHQ
press the
Air Switch
. The compressed
air travelling through the
Venturi Tube
Assembly
will pull a vacuum on the
cooling system to remove air from the
system.
Once the vacuum reading on the
Gauge
UHDFKHVDSSUR[LPDWHO\RQ
the green scale, release the
Air Switch
.
Note that this also a good opportunity
to check for cooling system leaks,
5. Continue to hold the Cooling System
7RRORQWRWKHUDGLDWRUÀOOHUQHFNDQG
open the
Coolant Valve
to allow coolant
WRÁRZLQWRWKHUDGLDWRU
6. Once the pressure on the
Gauge
UHDFKHVDSSUR[LPDWHO\RQWKHUHG
scale and the radiator is almost full,
shut off the
Coolant Valve
and remove
the Cooling System Tool from the
UDGLDWRUÀOOHUQHFN
7.
7RSRIIWKHUDGLDWRUDQGRYHUÁRZWDQN
as necessary.
Compressed Air
Supply Line
Air
Switch
Gauge
Coolant
Valve
FORVHG
Coolant
Supply
Line
Venturi
Tube
Assembly
Removing the Air from the Cooling System with Cooling System Tool
Gauge
Coolant
Valve
RSHQ
Filling Cooling System with Coolant