New Holland 40 Series Repair Manual page 24

- - - - - - - - - - - PART 1 - ENGINE S Y S T E M S - - - - - - - - - -
PROBLEM
Engine overheats
POSSIBLE CAUSES
1 . Hose connection leaking
or collapsed
REMEDY
1. Tighten hose connection,
renew hose if damaged
2. Radiator cap defective or 2. Renew radiator cap
not sealing
3. Radiator leakage 3. Repair/renew radiator
4. Improper fan belt
adjustment
5. Radiator fins restricted
6. Faulty thermostat
7. Internal engine leakage
8. Water pump faulty
9. Exhaust gas leakage into
cooling system
10. Coolant aeration
11 . Cylinder head gasket
improperly installed
12. Hot spot due to rust and
scale or clogged water
jackets
4. Re-adjust fan belt
5. Clean with compressed air
6. Renew thermostat
7. Check for source of
leakage, renew gasket or
defective parts
8. Overhaul water pump
9. Renew cylinder head
gasket, check head for
damage or distortion
1 0. Tighten all connections and
check coolant level is
correct. Ensure cylinder
head gasket has not blown
11. Renew cylinder head
gasket'
12. Reverse flush
entire
cooling system
13. Obstruction to radiator air 13. Remove the obstruction
flow
14. Extended engine idling 14. Do not allow engine to idle
for long periods
15. Oil cooler tube blocked 15.Clean
16. Radiator core tubes 16. Check free flow
blocked
6