5.
Start engine and allow coring head to fully raise. Turn
5. Remove plugs from disconnected hose and fitting.
engine off. Secure coring head with service latch.
6.
Connect hydraulic hose with new o–ring to hydraulic
fitting on lift cylinder. Tighten hose connection.
CAUTION
7.
Install disconnected extension spring to machine in
reverse order of disassembly.
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy•
draulic oil. See Relieving Hydraulic System Pres•
sure in the General Information section of this
chapter.
8.
9.
Install rear hood.
Install tine heads to stomper arms (see Operator’s
Manual).
10.Follow
Hydraulic System Start–up procedures.
6.
Release hydraulic pressure in lift cylinder:
A. Turn key switch to ON (engine not running).
2
B. Move traction lever to forward direction and de•
press lower switch on handle to lower coring head
onto service latch.
3
7.
Disconnect hydraulic hose from hydraulic fitting on
lift cylinder. Locate and discard o–ring from between
hose and fitting. Allow hose to drain into a suitable con•
tainer.
4
8.
tamination.
Plug disconnected hose and fitting to prevent con•
1
9.
Remove one retaining ring from the upper cylinder
pin. Pull upper cylinder pin from the lift cylinder and cor•
ing head frame. Locate and retrieve spacer and thrust
washer from each side of cylinder pivot (Fig. 43).
Figure 42
1.
2.
Extension spring
3.
4.
Lower carriage screw
1/2” drive hole
Upper carriage screw
10.Remove
one retaining ring from the lower cylinder
pin on the side of the disconnected extension spring.
Support lift cylinder and slide lower cylinder pin from the
lift cylinder and machine frame.
2
4
4
2
11.
Remove lift cylinder from the machine.
3
12.If
needed, remove hydraulic fitting and o–ring from
the lift cylinder. Discard o–ring.
Installation (Fig. 41)
1
1.
If removed, install hydraulic fitting and new o–ring
into lift cylinder.
2.
Position lift cylinder to the machine mounting points.
Make sure the port of the lift cylinder faces the front of
the machine.
Figure 43
1.
2.
Lift cylinder shaft
Thrust washer
3.
4.
Cylinder pin
Spacer
3.
mount. Install cylinder pin and secure with retaining ring.
Align lower lift cylinder mounting hole with frame
4.
Align upper lift cylinder pivot with slots in the coring
head frame. Install cylinder pin making sure that a
spacer is on each side of the cylinder pivot and a thrust
washer is positioned between coring head frame and re•
taining ring (Fig. 43). Secure with retaining ring.
ProCore 648
Page 4 – 51
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro 648 |
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| Document Type | Service Manual |
| Language | English |
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