Hydraulic Hoses
Hydraulic hoses are subject to extreme conditions such as pressure differentials during operation and exposure to weather, sun, chemicals, very warm storage condi- tions or mishandling during operation and maintenance. These conditions can cause hose damage and deterio- ration. Some hoses are more susceptible to these conditions than others. Inspect all machine hydraulic hoses frequently for signs of deterioration or damage:
Hard, cracked, cut, abraded, charred, leaking or otherwise damaged hose.
Kinked, crushed, flattened or twisted hose.
Blistered, soft, degraded or loose hose cover.
Cracked, damaged or badly corroded hose fittings.
When replacing a hydraulic hose, be sure that the hose is straight (not twisted) before tightening the fittings. This can be done by observing the imprint (layline) on the hose. Use two wrenches; hold the hose straight with one wrench and tighten the hose swivel nut onto the fit- ting with the other wrench (See Hydraulic Hose and Tube Installation in this section). If the hose has an el- bow at one end, tighten the swivel nut on that end before tightening the nut on the straight end of the hose.
For additional hydraulic hose information, refer to Toro Service Training Book, Hydraulic Hose Servicing (Part Number 94813SL).
WARNING
Before disconnecting or performing any work on hydraulic system, relieve all pressure in system (see Relieving Hydraulic System Pressure in this section).
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 the skin and cause serious injury. If fluid is in- jected into the skin, it must be surgically re- moved within a few hours by a doctor familiar with this type of injury. Gangrene may result from such an injury.
Hydraulic System | Page 4 | Groundsmaster |
