3.
moveflangenutandcarriagescrewthatsecurer--clamp
to lift cylinder (Fig. 95).
If lift cylinder for deck #4 or #5 is being removed, re-
4. Align lift cylinder to lift arm mounting holes. Slide cyl-
inderslidepin(item13)(withthrustwasher(item12)and
retaining ring (item 11) installed on one end) through the
lift cylinder and lift arm. Install second thrust washer on
pin and secure with retaining ring (item 11).
4.
poses. Thoroughly clean hydraulic connections prior to
loosening hydraulic lines from lift cylinder.
Label all hydraulic connections for assembly pur-
5. Remove caps and plugs from disconnected hoses
and fittings.
CAUTION
6. Coat new fitting O--rings lightly with clean hydraulic
oil, install new O--rings and connect hydraulic hoses to
fittings on lift cylinder. Tighten hose connections (see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
7. If lift cylinder for deck #4 or #5 was removed, secure
r--clamptoliftcylinderwithflangenutandcarriagescrew
(Fig. 95).
5.
derthatistoberemoved.Allowhosestodrainintoasuit-
able container. Remove and discard O--rings.
Disconnect hydraulic hoses from fittings in lift cylin-
8.
oil if necessary.
Check oil level in hydraulic reservoir and add correct
9.
Lubricate lift cylinder grease fittings.
Hydraulic System Start--up procedures (see
6.
to prevent contamination.
Putcaps or plugs on disconnected hoses andfittings
10.Follow
Hydraulic System Start--up in this section).
7.
Removeoneretainingring(item11)andthrustwash-
er (item 12) from the cylinder slide pin (item 13). Pull pin
fromtheliftcylinderandliftarm.Locateandretrievesec-
ond thrust washer.
2
8.
(item 5) that retain lift cylinder to pivot shaft.
Remove flange head screw (item 3) and flat washer
9.
Remove lift cylinder from pivot shaft and frame.
hydraulic fittings are to be removed from lift cylin-
3
1
10.If
der, mark fitting orientation to allow correct assembly.
Remove fittings from lift cylinder and discard O--rings.
4
Installation (Fig. 93)
1.
Ifhydraulicfittingswereremovedfromliftcylinder,lu-
bricate new O--rings, position O--rings to fittings and
install fittings into liftcylinder ports(see Hydraulic Fitting
Installation in the General Information section of this
chapter). Makesurethatfittingsareorientatedcorrectly.
Figure 95
1.
2.
Lift cylinder (#4 shown)
Carriage screw
3.
4.
R--clamp
Flange nut
2.
rel end should be attached to the machine frame.
Position liftcylinder totheframe.Theliftcylinderbar-
3.
Slide barrel end of lift cylinder onto pivot shaft. Se-
cure cylinder with flange head screw (item 3) and flat
washer (item 5). Torque screw from 67 to 83 ft--lb (91
to 112 N--m).
Groundsmaster 4300--D
Page 4 -- 105
Hydraulic System
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