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.)
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.
2.
Put caps or plugs on any hydraulic lines left open or
exposed during testing or removal of components.
CAUTION
3.
The engine must be in good operating condition. Use
a tachometer when making a hydraulic test. Engine
speed can affect the accuracy of the tester readings.
Failure to use gauges with the recommended
pressure (psi) rating as listed in the test pro•
cedures could result in damage to the gauge
and possible personal injury from leaking
hot oil.
4.
To prevent damage to tester or components, the inlet
and the outlet hoses must be properly connected, and
not reversed (tester with pressure andflow capabilities).
Before Performing Hydraulic Tests
5. To minimize the possibility of damaging components,
completely open the load valve by turning it
counterclockwise (tester with pressure and flow
capabilities).
All obvious areas such as oil supply, filter, binding
linkage, loose fasteners, or improper adjustments must
be checked before assuming that a hydraulic com•
ponent is the source of the problem being experienced.
6. Install fittings finger tight, far enough to insure that
they are not cross-threaded, before tightening with a
wrench.
Do electrical diagnostics before performaing hydraulic
tests to make sure the electrical system is operating
properly.Ifthe electricalsystem is notoperatingproperly
the hydraulic system may appear to malfunction.
7. Position the tester hoses so that rotating machine
parts will not make contact with them and result in hose
or tester damage.
8.
9.
Check the oil level in the reservoir.
WARNING
Check the control linkage for improper adjustment,
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved by lowering the cut•
ting unit to the ground and shutting the en•
gine OFF.
binding or broken parts.
10.
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 do serious
damage. 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 gangrene may result.
Testing
Page 5 - 18
Groundsmaster® 300 Series
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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(2 votes, average: 5 out of 5)
Lawn and Garden readers have rated Toro 92801SL Rev I Groundsmaster 300 Series Groundsmaster 328 D Service Manual 5.0 out of 5.0 based on 2 product reviews. Need 328D. Manual pdf. Will rate after finding manual
t has been a very reliable machine but getting parts is hard and not cheap to buy , generic parts has been cost effective and reliable , i am unable to get a wiring circut diagram for this unit as most problems are electrical problems