Service Manual

19
Hydraulic Hoses and Fittings
Hydraulic Hoses
Hydraulic hoses are subject to extreme conditions
such as, pressure differentials during operation and
exposure to weather, sun, chemicals, high tem-
perature operating conditions or mishandling during
operation or storage. Hoses that move during op-
eration are more susceptible to these conditions
than others.
Before disconnecting or performing any
work on a hydraulic system, all pressure
in the system must be relieved by
stopping the engine and lowering or
supporting the implement.
Keep body and hands away from
pin hole leaks or nozzles that eject
hydraulic fluid under 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 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.
Inspect hoses frequently for signs of deterioration
or damage. Check hoses for leakage and replace
when leaks are found.
Figure 1
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
on the hose. Using two wrenches, hold the hose
straight with one wrench and use the other wrench
to tighten the hose swivel nut to the fitting. Use
procedures shown in the Toro Hydraulic Hose
Servicing Manual, Form No. 94-813-SL.
Figure 2