Engine Cooling System - MacDon M105 Operator's Manual

Engine Cooling System

The engine cooling system is designed to maintain the engine operating temperature within the specified
operating range.
NOTE:
Antifreeze is essential in any climate. It broadens the operating temperature range by lowering the coolant
freezing point, AND by raising its boiling point. Antifreeze also contains rust inhibitors and other additives to
prolong engine life.
IMPORTANT:
If antifreeze strength is not adequate, do NOT drain cooling system to protect against freezing. System may not
drain completely and damage from freezing could still result.
Refer to
Lubricants, Fluids, and System Capacities, page 199
Inspecting Radiator Cap
The radiator cap must fit tightly and the cap gasket must be in good condition to maintain the 14–18 psi
(97–124 kPa) pressure in the cooling system.
CAUTION
To avoid personal injury from hot coolant, do NOT turn radiator cap until engine cools.
1. Open the hood. Refer to
Position), page 203.
2. Open the platform. Refer to
(Standard Position), page
3. Turn the cap (A) counterclockwise to the first notch to
relieve pressure before removing cap completely.
4. Turn the cap (A) again and remove.
5. Check the gasket for cracks or deterioration and
replace the cap if necessary.
6. Check that the spring in the cap moves freely.
7. Replace the cap if spring is stuck.
8. Close the platform. Refer to
(Standard Position), page
9. Close the hood. Refer to
Position), page 204.
Checking Engine Coolant Strength
Check the anti-freeze in the radiator with a tester annually, preferably before off-season storage.
CAUTION
To avoid personal injury from hot coolant, do NOT turn radiator cap until engine cools.
169890
MAINTENANCE AND SERVICING
5.4.3 Opening Hood (Highest
5.5.1 Opening Platform
205.
5.5.2 Closing Platform
206.
5.4.4 Closing Hood (Highest
for detailed information.
Figure 5.93: Engine Cooling System
245
Revision A