Toro 3000D manual Testing

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.)

CAUTION

Failure to use gauges with recommended pressure (psi) rating as listed in test proce- dures could result in damage to gauge and possible personal injury from leaking hot oil.

Before Performing Hydraulic Tests

All obvious areas such as oil supply, filter, binding link­ age, loose fasteners, or improper adjustments must be checked before assuming that a hydraulic component is the source of the problem being experienced.

WARNING

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 or supporting the cutting units or other implements.

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.

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.

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.

4.To prevent damage to tester or components, the inlet and the outlet hoses must be properly connected, and not reversed (tester with pressure and flow capabilities).

5.To minimize the possibility of damaging components, completely open load valve in hydraulic tester (when us­ ing tester with pressure and flow capabilities).

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.

Hydraulic System and Transaxle

Groundsmaster 3000/3000–D Page 5 – 11 Hydraulic System