86 Hydraulic System
For new vehicles, change the return filter element after 50 hours of use, and twice a year
afterwards or when the filter restriction indicator is in the yellow (see Figure 5-1), whichever
comes first (see Replacing Filter Elements on page 120).
Clean the strainer inside the hydraulic tank after the first 50 hours of use, and twice a year
afterwards or when the filter restriction indicator is in the yellow (see Figure 5-1), whichever
comes first (see Cleaning the Strainer on page 117).
Hydraulic oil must be replaced at least once a year, or when contaminated (see Emptying the
Hydraulic Tank on page 115).
NOTE: The ball valve (or shut-off valve) on the hydraulic tank (see Figure 2-13) must be completely
open before engaging the pump or starting the engine.
Labrie Enviroquip Group requires that the hydraulic fluid and return oil filter be changed and that the
strainer be cleaned before changing the hydraulic pump.
Manufacturer’s warranty on hydraulic pumps provided or sold by Labrie Enviroquip Group could be
declared void if the hydraulic fluid and return oil filter are not changed, and if the strainer is not
cleaned prior to replacing the hydraulic pump.
Therefore, it is mandatory to change the return oil filter and clean the strainer after the first 50 hours
of pump operation, then twice a year or when the filter restriction indicator is in the yellow
(see Figure 5-1), whichever comes first. The hydraulic fluid must be changed once a year. Hydraulic
fluid contamination will severely damage hydraulic components.
Figure 5-1
Filter restriction indicator
Inspecting Hydraulic Oil
Inspecting hydraulic oil is a very important maintenance task that must be done as per your Preventive
Maintenance Chart. The most important items to look at when inspecting hydraulic oil are:
color
amount
texture (usually in the form of air bubbles or foam), and
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