Testing
The most effective method for isolating problems in the
hydraulic system is by using hydraulic test equipment
such as pressure gauges in the circuits during various
operational checks (see Special Tools section in this
Chapter).
1. Thoroughly clean the machine before disconnecting
or disassembling any hydraulic components. Always
keep in mind the need for cleanliness when working on
hydraulic equipment. Hydraulic system contamination
will cause excessive wear of hydraulic components.
2.
exposed during testing or removal of hydraulic compo-
nents.
Put caps or plugs on any hydraulic lines left open or
CAUTION
Failure to use gauges with recommended pres-
sure (PSI/bar) rating as listed in test procedures
could result in damage to gauge and possible
personal injury from leaking hot oil.
3.
Hydraulic flow and relief pressure for the ProCore
Processoraredeterminedbythetowvehicle.Makesure
that the hydraulic system of the tow vehicle is consid-
eredwhentroubleshootinghydraulicperformanceprob-
lems with the ProCore Processor.
Before Performing Hydraulic Tests
4.
Install hydraulic fittings finger tight, far enough to in-
sure that they are not cross--threaded, before tightening
with a wrench.
All obvious areas such as oil supply, filter, binding link-
age, loose fasteners, incorrect adjustments or improper
operation must be checked before assuming that a hy-
draulic component is the source of the problem being
experienced.
5.
Topreventhoseortesterdamage,position thetester
hoses so that moving machine parts will not make con-
tact with them.
Precautions For Hydraulic Testing
6.
Check and adjust the oil level in the reservoir of the
tow vehicle after connecting hydraulic test equipment.
WARNING
7.
Check the hydraulic control components on the tow
vehicle for improper adjustment, binding or broken
parts. Make sure controls are functioning properly be-
fore conducting hydraulic tests.
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hydrau-
lic System Pressure in the General Information
section of this chapter.
8.
oil at normal operating temperature.
All hydraulic tests should be made with the hydraulic
Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, not hands, to
search for leaks. Hydraulic fluid escaping under
pressure can have sufficient force to penetrate
skin and cause serious injury. If fluid is injected
into the skin, it must be surgically removed
within a few hours by a doctor familiar with this
type of injury. Gangrene may result from such
an injury.
ProCore Processor
Page 4 -- 17
Hydraulic System
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