Toro GroundsmasterR 4300-D Service Manual page 137

3. If lift cylinder for deck #4 or #5 is being removed, re-
move flange nut and carriage screw that secure r--clamp
to lift cylinder (Fig. 95).
4. Label all hydraulic connections for assembly pur-
poses. Thoroughly clean hydraulic connections prior to
loosening hydraulic lines from lift cylinder.
CAUTION
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.
5. Disconnect hydraulic hoses from fittings in lift cylin-
der that is to be removed. Allow hoses to drain into a suit-
able container. Remove and discard O--rings.
6. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
7. Remove one retaining ring (item 11) and thrust wash-
er (item 12) from the cylinder slide pin (item 13). Pull pin
from the lift cylinder and lift arm. Locate and retrieve sec-
ond thrust washer.
8. Remove flange head screw (item 3) and flat washer
(item 5) that retain lift cylinder to pivot shaft.
9. Remove lift cylinder from pivot shaft and frame.
10.If hydraulic fittings are to be removed from lift cylin-
der, mark fitting orientation to allow correct assembly.
Remove fittings from lift cylinder and discard O--rings.
Installation (Fig. 93)
1. If hydraulic fittings were removed from lift cylinder, lu-
bricate new O--rings, position O--rings to fittings and
install fittings into lift cylinder ports (see Hydraulic Fitting
Installation in the General Information section of this
chapter). Make sure that fittings are orientated correctly.
2. Position lift cylinder to the frame. The lift cylinder bar-
rel end should be attached to the machine frame.
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
4. Align lift cylinder to lift arm mounting holes. Slide cyl-
inder slide pin (item 13) (with thrust washer (item 12) 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).
5. Remove caps and plugs from disconnected hoses
and fittings.
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).
7. If lift cylinder for deck #4 or #5 was removed, secure
r--clamp to lift cylinder with flange nut and carriage screw
(Fig. 95).
8. Check oil level in hydraulic reservoir and add correct
oil if necessary.
9. Lubricate lift cylinder grease fittings.
10.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
3
4
1. Lift cylinder (#4 shown)
2. Carriage screw
Page 4 - - 105
2
Figure 95
3. R- -clamp
4. Flange nut
Hydraulic System
1