4-42

Section 4 - Lubrication & Maintenance

Every 1500 Hours or Yearly

Operation 55

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.. Unscrew and discard the old coolant filter (2).. Clean the gasket surface on the filter head.. 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 new 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..

1

2

ON OFF

F4-30

435/485/535