Komatsu 830E-AC Shop Manual page 136

Pressure Testing
The radiator should be pressure tested at 103 kPa
(15 psi) for 30 minutes. Various methods of pressure
testing include the following:
• Pressurize the radiator and submerge into a test
tank. Watch for leaks.
• Lay the front side of the radiator on the floor. Cap
off ports, and fill the radiator with hot water.
Pressurize the radiator and check for leaks.
• Cap off radiator ports. Install an air pressure
gauge and pressurize to 103 kPa (15 psi).
Remove the air source and monitor the pressure
gauge.
• Pressurize the radiator with air, and spray sealed
joints with soapy water.
Additional service information can be found on
the L&M Radiator website at www.mesabi.com.
C3-12
COOLANT SYSTEM
TROUBLESHOOTING
If abnormal coolant temperatures are experienced,
perform the following visual inspections and tests:
1. Check the coolant level and thoroughly inspect
the system for leaks.
a. Check for proper coolant/antifreeze mixture.
b. Follow the recommendations of the engine
manufacturer regarding use of cooling
system additives.
2. Inspect the radiator fins for restrictions. Ensure
the air flow through the radiator is not restricted
by debris or bent radiator fins.
3. Inspect the fan blades for damage.
4. Check the radiator cap sealing surfaces.
5. If equipped with a fan clutch, refer to Section N,
Operator Comfort, for complete instructions for
testing and repairs, if required.
6. Refer to the engine manufacturer's Service
Manual for information about testing and
replacing the cooling system thermostats.
Cooling System C03035