B-11
Perform Hydraulic Oil Analysis
We require that this procedure be performed
every 250 hours or quarterly, whichever comes
first.
Replacement or testing of the hydraulic oil is
essential for good machine performance and
service life. Dirty oil may cause the machine to
perform poorly and continued use may cause
component damage. Extremely dirty
conditions may require oil changes to be
performed more often.
Before replacing the hydraulic oil, the oil may
be tested by an oil distributor for specific levels
of contamination to verify that changing the oil
is necessary.
If the hydraulic oil is not replaced at the two
year inspection, test the oil quarterly. Replace
the oil when it fails the test. See E-1, Test or
Replace the Hydraulic Oil.
B-12
Inspect the Hydraulic Tank Cap
Venting System
We require that this procedure be performed
quarterly or every 250 hours, whichever
comes first. Perform this procedure more
often if dusty conditions exist.
A free-breathing hydraulic tank cap is essential
for good machine performance and service life.
A dirty or clogged cap may cause the machine
to perform poorly. Extremely dirty conditions
may require that the cap be inspected more
often.
1 Remove the breather cap from the
hydraulic tank.
2 Check for proper venting.
⊙ Result: Air passes through the breather
cap.
¤ Result: If air does not pass through the cap,
clean or replace the cap. Proceed to step 3.
Note: When checking for positive tank cap
venting, air should pass freely through the cap.
3 Using a mild solvent, carefully wash the
cap venting system. Dry using low
pressure compressed air. Repeat step 2.
4
Install the breather cap onto the hydraulic
tank.
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