Testing
The most effective method for isolating problems in the
hydraulic system is by using hydraulic test equipment
such as pressure gauges and flow meters in the circuits
during various operational checks (see the Special
Tools section in this chapter).
2. Review all test steps before starting the test proce-
dure.
3.
Before testing, check all control linkages for improp-
er adjustment, binding or broken parts.
4.
All hydraulic tests should be made with the hydraulic
Before Performing Hydraulic Tests
oil at normal operating temperature. Operate the ma-
chine under load for at least 10 minutes before perform-
ing hydraulic tests.
IMPORTANT: All obvious areas such as oil supply,
oil filter, binding linkages, loose fasteners or im-
proper adjustments must be checked before as-
suming that a hydraulic component is the source of
a hydraulic system problem.
WARNING
Precautions for Hydraulic Testing
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
CAUTION
Failure to use gauges with expected pressure
(psi) rating as listed in test procedures could re-
sultindamagetothegaugeandpossibleperson-
al injury from leaking hot oil.
5.
open or exposed during testing or component removal.
Put metal caps or plugs on any hydraulic lines left
6.
When using hydraulic tester (pressure and flow), the
inlet and the outlet hoses must be properly connected
and not reversed to prevent damage to the hydraulic
tester or components.
CAUTION
All testing should be performed by two (2)
people.Onepersonshouldbeintheseattooper-
ate the machine and the other should read and
record test results.
7.
makesurethattheyarenotcross--threadedbeforetight-
ening them with a wrench.
Install hydraulic fittings finger tight and far enough to
8.
parts from contacting and damaging the hoses or tester.
Position tester hoses to prevent rotating machine
WARNING
9.
After connecting test equipment, check oil level in
the hydraulic tank to make sure that oil level is correct.
Keepbodyandhandsawayfrompinholeleaks
or nozzles that eject hydraulic fluid under high
pressure. Do not use hands to search for
leaks; use paper or cardboard. Hydraulic fluid
escaping under pressure can have sufficient
force to penetrate the 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. Gan-
grene may result from such an injury.
10.When
using hydraulic tester (pressure and flow),
opentesterloadvalvecompletelybeforestartingengine
to minimize the possibility of damaging components.
11.Theenginemustbeingoodoperatingcondition.Use
a phototac when performing a hydraulic test. Engine
speed can affect the accuracy of the tester readings.
Check actual speed of the pump when performing hy-
draulic flow tests.
12.After
pleted, check oil level in the hydraulic tank to make sure
that oil level is correct.
hydraulic test procedures have been com-
1.
Clean machine thoroughly before disconnecting or
disassembling any hydraulic components. Always keep
in mind the need for cleanliness when working on hy-
draulic equipment. Contamination can cause excessive
wear or binding of hydraulic components.
Hydraulic System
Page 4 -- 26 Rev. B
Reelmaster 5010 Series
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