Greensmaster 3300/3400 Hydraulic SystemPage 5 -- 7
Hydraulic Hose and Tube Installation (O--Ring Face Seal Fitting)
1. Makesurethreadsandsealingsurfacesofthehose/
tube and thefitting arefreeof burrs, nicks, scratchesor
any foreign material.
2. Asapreventativemeasureagainstleakage,itisrec-
ommended that the face seal O--ring be replaced any
time the connectionisopened. Make suretheO--ring is
installedandproperlyseatedinthefittinggroove.Lightly
lubricate the O--ring with clean hydraulic oil.
3. Place the hose/tube against the fitting body so that
theflatfaceofthehose/tubesleevefullycontactstheO--
ring in the fitting.
4. Thread the swivel nut onto the fitting by hand. While
holding the hose/tube with a wrench, use a torque
wrench to tighten the swivel nut to the recommended
installation torque shown in Figure 5. This tightening
process will require the use of an offset wrench (e.g.
crowfoot wrench). Use of an offset wrench will affect
torque wrench calibration due to the effective length
change of the torque wrench. Tightening torque when
usingatorquewrenchwithanoffsetwrenchwillbelower
than the listed installation torque (see Using a Torque
Wrench with an Offset Wrench in the Torque Specifica-
tionssection ofChapter2 -- ProductRecords andMain-
tenance).
5. If a torque wrench is not available or if space at the
swivelnutpreventsuseofatorquewrench,analternate
method of assembly is the Flats From Wrench Resist-
ance (F.F.W.R.) method (Fig. 2).
A. Usingaw rench,tightentheswivelnutontothefit-
tinguntillightwrenchresistanceisreached(approxi-
mately 30 in--lb).
B. Mark the swivel nut and fitting body. Hold the
hose/tube with a w rench to prevent it from turning.
C. Useasecondwrenchtotightenthenuttothecor-
rect Flats From Wrench Resistance (F.F.W.R.). The
markingsonthenutandfittingbodywillverifythatthe
connection has been properly tightened.
Fitting Size F.F.W.R.
4 (1/4 in. nominal hose or tubing) 1/2 to 3/4
6 (3/8 in.) 1/2 to 3/4
8 (1/2 in.) 1/2 to 3/4
10 (5/8 in.) 1/2 to 3/4
12 (3/4 in.) 1/3 to 1/2
16 (1 in.) 1/3 to 1/2
Figure 3
O--ring
Fitting Body
Swivel Nut
Tube or Hose
Figure 4
Final
AT WRENCH RESISTANCE
Position
Mark Nut
and Fitting
Initial
Position
Extend Line
AFTER TIGHTENING
Body
Fitting Dash Size Hose/Tube Side Thread Size Installation Torque
4 9/16 -- 18 18to22ft--lb(25to29N--m)
6 11/16 -- 16 27to33ft--lb(37to44N--m)
8 13/16 -- 16 37to47ft--lb(51to63N--m)
10 1--14 60 to 74 ft--lb (82 to 100 N--m)
12 13/16--12 85 to 105 ft--lb (116 to 142 N--m)
16 17/16--12 110 to 136 ft--lb (150 to 184 N--m)
20 1 11/16 -- 12 140 to 172 ft--lb (190 to 233 N--m)
Figure 5
Hydraulic
System
To Next Page
Loading...
