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Testing
The most effective method for isolating troubles 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.)
Hydraulic testers may vary significantly in size, con-
struction, accuracy, and cost. The decision as to which
tester to purchase should be influenced by what type of
tests will be performed on all of the hydraulically-pow-
ered equipment in the shop.
All obvious areas such as oil supply, filter, binding
linkage, loose fasteners, or improper adjustments must
be checked before assuming that a hydraulic compo-
nent is the source of the problem being experienced.
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved by stopping the en-
gine and lowering the implement to the
ground.
Keep body and hands away from pin hole
leaks or nozzles that eject hydraulic fluid un-
der 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 do serious dam-
age. 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 or gan-
grene may result.
Before Performing Hydraulic Tests
1. Thorough clean the machine before disconnecting or
disassembling any hydraulic components. Always keep
in mind the need for cleanliness when working on hy-
draulic equipment.
2. Put caps or plugs on any hydraulic lines left open or
exposed during testing or removal of components.
3. The engine must be in good operating condition.
ALWAYS use a tachometer when making a hydraulic
test. Engine speed will affect the accuracy of the tester
readings.
4. To prevent damage to the tester or components, the
inlet and the outlet hoses must be properly connected,
and not reversed (tester with pressure and flow capa-
bilities).
5. To minimize the possibility of damaging the compo-
nents, completely open the load valve by turning it
counterclockwise (tester with pressure and flow capa-
bilities).
IMPORTANT: The pump used on the Greensmaster
3100 is a positive displacement type. If its output
flow is completely restricted or stopped, damage to
the pump or other components could occur.
6. Install fittings finger tight, far enough to insure that
they are not cross-threaded, before tightening with a
wrench.
7. Position the tester hoses so that rotating machine
parts will not make contact with them and result in hose
or tester damage.
8. Check the oil level in the reservoir.
9. Check the control linkage for improper adjustment,
binding or broken parts.
10. All hydraulic tests should be made with the hydraulic
oil at normal operating temperature (hoses warm to the
touch).
WARNING
Greensmaster
®
3100 Page 4 - 27 Testing