Ashland 1200 TR - Manual (Page 27)

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9. AFTER THE FIRST TWO HOURS OF SYSTEM OPERATION, INSPECT AND CLEAN OR REPLACE
ALL FILTER ELEMENTS TO REMOVE ANY CONTAMINATION FLUSHED OUT OF SYSTEM COMPO-
NENTS. REPLACEMENT ELEMENTS ARE READILY AVAILABLE FROM ACTIVATION. REPEAT
THIS TASK EVERY TWO HOURS FOR THE NEXT EIGHT HOURS OF OPERATION, THEN AS
NEEDED. (SEE SECTION ON OIL MAINTENANCE)
IMPORTANT!
FOR MOST APPLICATIONS, AN OPERATING TEMPERATURE OF 150 DEGREES F IS CONSIDERED
MAXIMUM. AT HIGHER TEMPERATURES, DIFFICULTY IS OFTEN EXPERIENCED IN MAINTAIN-
ING RELIABLE AND CONSISTENT HYDRAULIC CONTROL. ALSO, COMPONENT SERVICE LIFE IS
REDUCED, HYDRAULIC FLUID DETERIORATES, AND POTENTIAL DANGER TO OPERATING
PERSONNEL IS CREATED.
OIL MAINTENANCE: FILTRATION
CONTAMINATION IN HYDRAUliC FLUID HAS BEEN GIVEN A LOT OF ATTENTION BY THE
INDUSTRY...AND IS IN FOR A LOT MORE. RESEARCH AND TESTING OF THE EFFECTS OF
DIRT. WATER, WEAR PRODUCTS, OIL DETERIORATION PRODUCTS AND OTHER CONTAMI-
NANTS IN THE OIL ARE IMPORTANT FACTORS IN TODAY'S HIGH PERFORMANCE HYDRAULIC
EQUIPMENT.
WHY CLEANLINESS?
THE DEMAND FOR EVEN GREATER PERFORMANCE FROM SMALLER PACKAGES HAS GREATLY
INCREASED THE NEED FOR KEEPING THE OIL CLEAN. WEAR OCCURS IN ALL HYDRAULIC
SYSTEMS. IF DIRT PARTICLES REMAIN SUSPENDED IN THE OIL, THEY ACT JUST LIKE A
GRINDING COMPOUND AND SPEED UP WEAR. OTHER FOREIGN PARTICLES. PARTICULARLY
METAL, HAVE THE SAME EFFECT. THE PARTS OF HYDRAULIC COMPONENTS IS AFFECTED BY
CONTAMINATION. STICKING AND SLUGGISHNESS CAN OCCUR; SMALL CONTROLLNG PAS-
SAGES MAY BECOME PLUGGED. DIRT CAN PREVENT VALVES FROM SEATING, RESULT IN LEAK-
AGE AND LOSS OF CONTROL.
THE HYDRAULIC OIL ITSELF IS AFFECTED BY CONTAMINATION. WATER HAS A TENDENCY
TO SEPARATE CERTAIN INHIBITORS FROM HIGH-PERFORMANCE HYDRAULIC OIL. REDUCING
ITS USABLE LIFE. OTHER CONTAMINANTS SEEM TO HAVE A CATALYST OR "HELPING HAND"
EFFECT IN OIL OXIDATION. IT HAS BEEN DEMONSTRATED THAT FINE PARTICULATE CON-
TAMINATION ACTUAlLY REDUCES THE SAFE OPERATING TEMPERATURE OF A SYSTEM. EX-
TREMELY CLEAN FLUIDS CAN OPERATE AS MUCH AS 25 TO 50 DEGREES HOTTER THAN CON-
TAMINATED FLUIDS, WITHOUT OXIDATION.
HYDRAULIC OIL IS KEPT CLEAN BY THE FILTERS. THE PERIODIC REPLACEMENT OF FILTER
ELEMENTS IS MANDATORY FOR SATISFACTORY OPERATION. REPLACE ELEMENTS IMMEDI-
ATELY UPON INDICATION OF AN INSTALLED BYPASS INDICATOR OR EVERY 500 HRS OF
OPERATION ONCE THE SYSTEM IS IN PRODUCTION.