General Information
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 mainte•
nance. These conditions can cause damage or
premature deterioration. Some hoses are more suscep•
tible to these conditions than others. Inspect the hoses
frequently for signs of deterioration or damage.
WARNING
Before disconnecting or performing any work
on hydraulic system, relieve all pressure in
system. See Relieving Hydraulic System Pres•
sure 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 injected into the skin, it must be surgi•
cally removed within a few hours by a doctor
familiar with this type of injury. Gangrene may
result from such an injury.
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.
Use two wrenches; hold the hose straight with one
wrench and tighten the hose swivel nut onto the fitting
with the other wrench.
Hydraulic Fitting Installation
O–Ring Face Seal
Nut
Body
1.
free of burrs, nicks, scratches, or any foreign material.
Make sure both threads and sealing surfaces are
Sleeve
2.
seated in the groove. It is recommended that the O–ring
be replaced any time the connection is opened.
Make sure the O–ring is installed and properly
Seal
3.
4.
Lubricate the O–ring with a light coating of oil.
Put the tube and nut squarely into position on the
Figure 1
face seal end of the fitting and tighten the nut until finger
tight.
5.
Mark the nut and fitting body. Hold the body with a
wrench. Use another wrench to tighten the nut to the cor-
rect Flats From Finger Tight (F.F.F.T.). The markings on
the nut and fitting body will verify that the connection has
been tightened.
Final
Position
Mark Nut
and Body
Initial
Extend Line
Position
Size
F.F.F.T.
4
6
8
10
12
16
(1/4 in. nominal hose or tubing)
(3/8 in.)
(1/2 in.)
(5/8 in.)
(3/4 in.)
(1 in.)
0.75 + 0.25
0.75 + 0.25
0.75 + 0.25
1.00 + 0.25
0.75 + 0.25
0.75 + 0.25
Finger Tight
After Proper Tightening
Figure 2
Hydraulic System
Page 4 – 4
ProCore 648
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 648 |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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