Specifications

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3-1 Hydraulic Oil
When implementing hydraulic equipment into
a schedule of regular service, it is essential
to adopt a regimented, properly administrated
hydraulic  uid maintenance schedule. Many
costly hydraulic system repairs can be drasti-
cally reduced or completely eliminated this way.
Bene ts of implementing a regular, properly ad-
ministered hydraulic  uid maintenance program
include:
● Increased system reliability and performance
● Eliminates repair costs due to hydraulic oil
contamination
● Saves time and money by keeping equipment
in the  eld rather than the service shop
Fluid Contamination
Hydraulic  uid becomes contaminated when
foreign matter is introduced into the hydraulic
system, which then leads to internal wear and
eventual component damage. Contaminants
can be introduced into the hydraulic system in
two ways:
Internally Generated Contamination
Failing internal components in a hydraulic sys-
tem can cause  uid contamination levels to rise
to unacceptable levels. This type of contamina-
tion will appear as wear debris.
Externally Generated Contamination
External contaminants can be introduced to hy-
draulic  uid through hydraulic connections, cyl-
inder rods, or improperly sealed hydraulic  uid
reservoirs. Keeping exposed cylinder rods and
hydraulic quick disconnects free from debris is
essential in preventing this type of contamina-
tion.
Recommended Testing Standards
Hydraulic  uid testing can be conducted with
the use of a portable  uid condition testing kit,
or by lab analysis. When setting up a hydraulic
 uid maintenance schedule, we recommend a
combination of both of these mediums to as-
sure accuracy in testing. While convenient, por-
table  uid condition test kits are not as accurate
or thorough as lab testing.
Testing should be conducted at regular in-
tervals and any time a hydraulic overhaul or
major maintenance is performed on the equip-
ment. Test samples should be taken from the
return line (upstream of the return  lter) when
the system is at regular operating temperature.
Designating time between testing may vary de-
pending on working environment and end user
maintenance policies.
Recommended Filtering Standards
All hydraulic  uid intended for use in McCoy
equipment should be  ltered to a minimum of
5-10 microns. All new fl uid that is to be in-
troduced into the system must be cleaned
and  ltered before being pumped into the
hydraulic reservoir.
Filters should be changed regularly. Assuming
cleanliness levels are within normal param-
eters, it is recommended that spin-on type  l-
ters be changed after  fty (50) hours of initial
use and then after every two hundred  fty (250)
hours of use. Use of a  lter condition indicator
is recommended.
Flushing the Hydraulic System
If testing shows the system’s hydraulic  uid
is outside of acceptable cleanliness margins,
the hydraulic system should be  ushed with
the use of a  lter cart. Once the  uid has been
 ushed and has returned to optimal cleanliness
levels, all  lters in the hydraulic system should
be changed out. Flushing should also be per-
formed before putting any new equipment into
service or after performing system maintenance
or overhauling existing equipment.
PLEASE NOTE:
This basic outline is intended to raise the
awareness of hydraulic system maintenance of
the end user, but is in no way intended to be a
complete reference for the implementation of a
hydraulic system maintenance program.
3-1.2 Hydraulic Fluid Maintenance
Fluids, Lubrication, & Torque