Cub Cadet 6X4 Shop Handbook page 248

Chapter 8 - Caterpillar Engine and Related Systems
4q. If liquid does not come out of the air vent
port, it may be necessary to pressurize
the front of the system using a cooling
system test kit. See Figure 8.65.
Figure 8.65
4r. Apply thread sealant to the air purge plug.
Once liquid is expelled from the air purge
port, reinstall the plug.
4s. Fill the coolant reservoir to a depth of
roughly 3" (7.6cm) with coolant.
4t. Install the radiator cap, confirm that no
unsafe condition will result from running
the engine, start the engine.
4u. Test-run the engine while closely monitor-
ing the over-temp. indictor, cooling fan
operation, or any overt signs that the
engine is over-heating.
4v. Run the engine until the thermostat has
cycled open-and-closed two times, using
a non-contact thermometer to monitor the
temperature of the engine and cooling
system.
4w. Allow the engine and cooling system to
cool.
4x. Check the coolant level at the radiator filler
neck. Top-up if necessary before return-
ing the vehicle to service.
See Figure 8.66.
NOTE: In service, it should not be necessary
for the operator to remove the radiator cap. The
coolant level should be checked at the start of
each operating day by looking at the fluid level in
the reservoir.
NOTE: If the cooling system requires internal
cleaning, contact the partnering Caterpillar
dealer. Use of commercially available cooling
system cleaners may cause damage to cooling
system components. use only cooling system
cleaner that are approved for Caterpillar
engines.
244
Figure 8.66