MacDon M155 Operators Manual - Manual (Page 327)

MAINTENANCE AND SERVICING
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.
• Engine exhaust stack may be hot.
1. Open the hood. Refer to 5.4.3 Opening Hood (Highest
Position), page 267 .
2. Open the platform. Refer to 5.5.1 Opening Platforms
(Standard Position), page 269 .
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 5.5.2 Closing Platforms
(Standard Position), page 270 .
9. Close the hood. Refer to 5.4.4 Closing Hood (Highest
Position), page 268 .
Figure 5.96: Engine Cooling System
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.
• Engine exhaust stack may be hot.
1. Open the hood. Refer to 5.4.3 Opening Hood (Highest
Position), page 267 .
2. Open the platform. Refer to 5.5.1 Opening Platforms
(Standard Position), page 269 .
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