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4. MAINTENANCE
WARNING
To check coolant level, refer to Operating section of
this manual and Engine Manual.
Inspect cooling system every 600 hours or 12 months.
1. Check entire cooling system hoses. Replace
hoses when hard, flimsy, or cracked.
2. Thoroughly inspect all cooling system hoses.
Replace hoses when hard, flimsy, or cracked.
IMPORTANT: Air must be expelled from cooling
system when system is refilled. Loosen
temperature-sending unit fitting at rear of cylinder
head to allow air to escape when filling system.
Retighten fitting when all the air has been expelled.
3. Test the coolant solution at 600 hours or 12 month
intervals and whenever excessive coolant is lost
through leaks or overheating to ensure the
necessary protection. Coolant test strips are
available from your John Deere dealer. These test
strips provide a simple, effective method to check
the freeze point and additive levels of your engine
coolant.
4. After 600 hours or 12 months of engine operating
time, recharge your engine coolant with the
recommended amount (see label on container) of
TY16004 or TY16005 Liquid Coolant Conditioner.
NOTE: TY16004 or TY16005 Liquid Coolant
Conditioner is a non-chromate inhibitor and should be
used only with low silicate, ethylene-glycol base
antifreeze. It does not protect the cooling system from
freezing. See "Adding Coolant."
Usually recharging your engine coolant with the
recommended amount of TY16004 or TY16005 Liquid
Coolant Conditioner at 600 hours or 12 months of
operation is adequate. However, with a CoolScan
analysis report you will be given a more thorough
evaluation of your engine coolant condition along with
detailed service recommendations. Refer to Engine
Manual.
IMPORTANT: Do not add supplemental coolant
additives when the cooling system is drained and
refilled with John Deere ANTIFREEZE/SUMMER
COOLANT or John Deere COOL GARD.
ALWAYS maintain coolant at correct level and
concentration. DO NOT operate engine without
coolant for even a few minutes.
If frequent coolant makeup is required, the glycol
concentration should be checked with JT05460
Refractometer to assure that the desired freeze point is
maintained. Follow manufacturers instructions
provided with Refractometer.
Water may be used as coolant in emergency situations
only.
Foaming, hot surface aluminum and iron corrosion,
scaling, and cavitation will occur when water is used as
the coolant, even when coolant conditioners are added.
Drain cooling system and refill with recommended
glycol base engine coolant as soon as possible.
4.8.1 Replacing Engine Coolant
Every 1200 hours or 24 months, the coolant should be
replaced. The coolant system should also be flushed
and pressure tested. Refer to Engine Manual.
4.8.2 Adding Coolant
CAUTION: Explosive release of fluids from
pressurized cooling system can cause serious burns.
Shut off engine. Only remove filler cap when cool
enough to touch with bare hands. Slowly loosen cap to
first stop to relieve pressure before removing
completely.
IMPORTANT: Never pour cold liquid into a hot
engine, as it may crack cylinder head or block. DO
NOT operate engine without coolant for even a few
minutes.
Air must be expelled from cooling system when
coolant is added.
1. Loosen temperature sending unit fitting at rear
of cylinder head to allow air to escape when
filling system.