Page 21
45-J Desel - Servce & Parts Manual
January 2022
Secton 10 - Hydraulc System
Hydraulic Fluid
Handling Precautions
PERSONS IN REGULAR CONTACT WITH MINERAL-BASED HYDRAULIC
FLUID NEED TO BE AWARE OF THE IMPORTANCE OF THOROUGH
HYGIENE AND THE PROPER METHODS FOR HANDLING MINERAL OILS,
IN ORDER TO AVOID POTENTIAL HAZARDS TO HEALTH������
IF MINERAL-BASED HYDRAULIC FLUID IS SPLASHED INTO THE
EYES, IT MUST BE WASHED OUT THOROUGHLY USING ABUNDANT
QUANTITIES OF WATER������ SEEK MEDICAL ATTENTION IF IRRITATION
PERSISTS������
HYDRAULIC FLUID UNDER PRESSURE CAN PENETRATE AND
BURN SKIN, DAMAGE EYES, AND MAY CAUSE SERIOUS INJURY OR
BLINDNESS������
FLUID LEAKS UNDER PRESSURE MAY NOT ALWAYS BE VISIBLE������
Fluid Recommendations
MEC recommends only the use of the Chevron hydraulic fluids listed in the chart below, and each
only in the operating temperatures listed in the chart. Do not substitute other fluids as pump damage
may result, and use only the fluid appropriate to the ambient operating temperature.
Recommended Hydraulic Fluid
> 30° F (0° C)
Chevron 1000THF
0° F (-18° C) ~ 30° F (0° C)
Chevron Rando Premium MV
< 0° F (-18° C)
Chevron Rando Premium MV
System Flushing Procedure
With boom fully lowered and retracted, drain hydraulic fluid from hydraulic reservoir into a clean,
empty container.
When the hydraulic reservoir is empty, remove suction strainer and hoses.
Remove the filter elements.
Flush the hoses with clean hydraulic fluid.
Discard old filter elements and replace.
Flush out the reservoir with hoses removed from the hydraulic reservoir.
Reinstall all hoses removed in the previous steps.
Fill hydraulic reservoir with filtered, fresh hydraulic fluid. Use only the appropriate hydraulic fluid
as recommended in “Fluid Recommendations” above.
Loosen the output hose fittings at the hydraulic pumps to flood with hydraulic fluid. Tighten
fittings.
Disconnect the wiring harness lead to the Fuel Solenoid on the engine.
Crank the engine for 5 seconds, then stop for 30 seconds. Do this three times.
Reconnect the wiring harness lead to the Fuel Solenoid on the engine.
Start the engine and allow it to run for one minute, then briefly operate all functions. Two or three
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