Troubleshooting
Continued on next page
ZE59858,0000075 -19-23SEP14-8/11
Symptom
Problem
Solution
Lack of coolant in cooling system
Fill cooling system to proper level.
Check radiator and hoses for loose
connections or leaks.
Low engine oil level
Check oil level. Add oil as required.
Radiator core dirty
Clean cooling system as required.
Cooling system needs flushing
Flush coolant system. (See Flushing
And Refilling Cooling System in the
Lubrication & Maintenance — 6000
Hours/72 Months Section.)
Engine overloaded
Reduce engine load.
Loose or defective fan belt
Check fan and alternator V-belt
tension. Replace as required.
(See Checking Fan And Alternator
V-Belt Tension in the Lubrication &
Maintenance — 500 Hours/12 Months
Section.)
Defective or wrong type of thermostat Test thermostat opening temperature,
replace thermostat as required.
Damaged cylinder head gasket
Replace cylinder head gasket. See
your authorized John Deere engine
distributor or servicing dealer.
Leak at cylinder head gasket
Replace cylinder head gasket. See
your authorized John Deere engine
distributor or servicing dealer.
Defective coolant pump
Replace coolant pump. See your
authorized John Deere engine
distributor or servicing dealer.
Defective radiator cap
Replace radiator cap as required.
Defective temperature gauge or
sender
Check coolant temperature with
thermometer and replace, if
necessary.
Incorrect grade of fuel
Use correct grade of fuel.
Coolant Temperature Below Normal
Defective thermostat
Test thermostat, replace thermostat
as required.
Defective temperature gauge or
temperature sender
Check gauge, sender, and
connections.
Coolant in Crankcase
Cylinder head gasket defective
Replace cylinder head gasket. See
your authorized John Deere engine
distributor or servicing dealer.
032715
PN=132
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