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SECTION 3 - LUBRICATION AND MAINTENANCE
3-35
EVERY 250 HOURS
OPERATION 27
Change the Coolant System Filter
The coolant system filter must be changed to
ensure the proper level of DCA4 (dry chemical
additive) is maintained in the engine cooling
system to provide maximum protection against
corrosion. To change the filter, proceed as
follows:
Turn the coolant shutoff valve, 1, to the “OFF”
position. Remove the radiator cap. Remove and
discard the coolant filter, 2. Clean the gasket
surface. Apply a light film of lubricating oil to the
gasket sealing surface before installing the new
coolant filter.
NOTE: All model tractors have one single
coolant system filter with a shut off valve
mounted on the right-hand side of the
engine.
WARNING: DO NOT REMOVE THE
RADIATOR CAP FROM A HOT ENGINE. HOT
STEAM WILL CAUSE SERIOUS PERSONAL
INJURY. REMOVE THE COOLANT SYSTEM
PRESSURE CAP AND CLOSE THE SHUTOFF
VALVES BEFORE REMOVING THE
COOLANT FILTER. FAILURE TO DO SO CAN
RESULT IN PERSONAL INJURY FROM
HEATED COOLANT SPRAY.
NOTE: Do not allow oil to get inside the filter.
Oil will adversely affect the DCA4.
Install the filter on the filter head. Tighten the filter
until the gasket contacts the filter head surface.
Tighten the filter an additional 1/2 to 3/4 of a turn.
NOTE: Over-tightening can distort the
threads or damage the filter head. Do not use
tools to tighten the filter.
Turn the coolant shutoff valve to the “ON”
position. Operate the engine, and check for
coolant leaks. After the air has been purged from
the system, check the coolant level again.
Figure 3-45
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