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 moresuscep-
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. Stop engine; lower or support all at-
tachment(s).
Keepbodyandhandsawayfrompinholeleaks
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
1.
free of burrs, nicks, scratches, or any foreign material.
Make sure both threads and sealing surfaces are
Nut
Body
2.
Make sure the O--ring is installed and properly
Sleeve
seated in the groove. It is recommended that the O--ring
be replaced any time the connection is opened.
Seal
3.
4.
face seal end of the fitting and tighten the nut until finger
tight.
Lubricate the O--ring with a light coating of oil.
Put the tube and nut squarely into position on the
Figure 1
5.
Mark the nut and fitting body. Hold the body with a
wrench.Useanotherwrenchtotightenthenuttothecor-
rect Flats From Finger Tight (F.F.F.T.). The markings on
thenutandfittingbodywillverifythattheconnectionhas
been tightened.
Final
Position
Size
F.F.F.T.
Mark Nut
and Body
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
Initial
Extend Line
Position
Finger Tight
After Proper Tightening
Figure 2
Groundsmaster 4500--D/4700--D
Page 4 -- 3
Hydraulic System (Rev. A)
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 4500 D, Toro Groundsmaster 4700 D |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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