Filter
Top Products
Groundsmaster 3505--D Hydraulic SystemPage 4 -- 3
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 or maintenance.
Thesec onditions cancause damageor premature dete-
rioration. Some hoses are more susceptible to these
conditions than others. Inspect the hoses frequently for
signs of deterioration or damage.
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 in position with one
wrench and tighten the hose swivel nut onto the fitting
with the second wrench.
WARNING
Before disconnecting or performing any work
on hydraulic system, relieve all pressure in
system (see Relieving Hydraulic System Pres-
sure). Stop engine; lower or support cutting
units and/or other attachment(s).
Keep bodyand hands away frompin 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.
Hydraulic Fitting Installation
O--Ring Face Seal
1. Make sure both threads and sealing surfaces are
free of burrs, nicks, scratches or any foreign material.
2. Makesure the o--ring is installed andproperly seated
in the groove. It is recommended that the o--ring be re-
placed any time the connection is opened.
3. Lubricate the o--r ing with a light coating of oil.
4. Put the tube and nut squarely into position on the
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 a second wrench to tighten the nut to the
correct Flats From Finger Tight (F.F.F.T.). The markings
on the nut and fitting body will verify that the connection
has been tightened.
Size F.F.F.T.
4 (1/4 in. nominal hose or tubing) 0.75 +
0.25
6(3/8in.) 0.75+
0.25
8(1/2in.) 0.75+
0.25
10 (5/8 in.) 1.00 +
0.25
12 (3/4 in.) 0.75 +
0.25
16 (1 in.) 0.75 +
0.25
Figure 1
Nut
Sleeve
Seal
Body
Figure 2
Mark Nut
and Body
Final
Position
Extend Line
Initial
Position
Finger Tight After Proper Tightening
Hydraulic
System