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4.2 ENGINE OIL AND FILTER
See engine manufactures operator/instruction manual for the proper engine oil and filter changing intervals
for the brand engine in your Boss compressor.
OIL FILTER REPLACEMENT
1. Clean the area around the lubricating filter head.
2. Remove the filter.
3. Clean the o-ring surface of the filter head.
NOTE: The o-ring can stick on the filter head. Make sure it is removed.
4. Apply a light film of lubricating oil to the o-ring-sealing surface before installing.
5. Install the filter as specified by the filter manufacturer.
CAUTION
4.3 ENGINE COOLING SPECIFICATIONS
Diesel engines require a balanced coolant mixture of water and ethylene glycol base antifreeze. This
protects the engine cooling system from corrosions as well as freezing damage. The Boss compressor is
shipped from the factory with a 50/50 mixture of water and ethylene glycol. In tropical climates where
freeze protection is not required, glycol engine coolant should still be used. It will help prevent corrosion
and pitting of cylinder liners. See engine manufactures operator/instruction manual for the proper engine
coolant for the brand engine in your Boss compressor.
MIXTURES:
Antifreeze concentration level should not exceed recommended levels. Doing so can cause cooling system
failure.
· Use a high quality, low silicate antifreeze
· A mixture of 50% antifreeze and 50% water is required for temperatures above –37 º C (-34 ºF).
· A mixture of 60% antifreeze and 40% water us required for environments below –37 ºC (-34 ºF). This
provides protection to –54 ºC (-65 ºF).
· Never exceed a 60% antifreeze and 40% water mix.
ENGINE COOLING SYSTEM
All engines have a pressurized cooling system that contains a 50/50 mixture of water and ethylene glycol.
Daily maintenance of the system includes a check of the coolant level, proper belt adjustment of fan and
water pump drives, soundness of fan and cleanliness of the radiator and oil cooler to permit airflow. Further
cooling system maintenance is defined in the engine maintenance manual.
MECHANICAL OVER-TIGHTENING MAY DISTORT THE THREADS OR DAMAGE
THE FILTER ELEMENT SEAL.