Using Line Marker - Toro ProCore 648 Operator's Manual

• If needed, loosen the switch mounting plate and lift to
its highest position and re–secure the mounting plate.
The higher the switch, the sooner the clutch engages
If the coring head fails to start before entrance and the
position switch is located as high as permissible, the
electric clutch may have deteriorated sufficiently to cause
a delay in engagement. Contact your Toro distributor or
refer to the ProCore 648 service manual.
Mini Tine (Quad Tine)
The mini–tine head developed by Toro is a very fast way
to aerate due to the double row design. This coring head
requires the hole spacing to be set at 2.5 inches. Ground
speed is critical to maintain the appearance of 1.25 in.
hole spacing. Refer to the hole spacing adjustment section
if your hole spacing requires a small change.
With the mini tine head or larger solid tine use, the turf
root structure is important to preventing turf damage due
to tearing of the root zone. If the center two arms begin to
lift the turf or damage to the root zone is excessive,
proceed as follows:
• Increase the hole spacing
• Decrease tine size
• Remove some of the tines
This damage is caused by the lifting action that solid tines
create when pulled from the turf. This lift can tear the root
zone if the density of tines or diameter of tines is too high.
Front Hole Dimpled or Pushed
(Solid Tines or softer soil conditions)
When aerating with longer solid tines (i.e. 3/8 in. x 4 in.
long) or needle type tines, the front of the holes may
become slotted or tufted. To regain excellent hole quality
for this configuration, slow the engine high idle speed
down to 2800 – 2900 rpm. The hole spacing is not
affected as the traction and coring head speeds are both a
function of engine speed.
If slowing the engine speed does not work to the remedy
hole quality for the larger solid tines, the Roto–Link
damper mechanism may require a stiffer setting. A stiffer
Roto–Link setting may help eliminate the front of the hole
from being deformed. However, under most conditions,
the factory setting works best.
Note: Alter half of the Roto–Links (3 arms) and test the
difference on a sample plot.
1. Remove the lock nuts securing the Roto–Link damper
assembly to the coring head frame.
2. Remove the top damper–spacer (1/2 inch thick) and
re–secure the Roto–Link damper assembly to the
coring head frame. Be sure to use the hardened "D"
washer.
3. Loosen the capscrews securing the bumper plate.
4. Slide the bumper plate forward and re–secure the
capscrews. This allows the Roto–Link bumpers to
oscillate properly.
Take the aerator to a test area and compare the hole
quality. If improved, complete this procedure with
remaining Roto–Link damper assemblies.
Note: This re–positioning of the Roto–Link damper must
be reversed if the tine type is changed back to a coring
style tine or any of the mini–tines.
Upon Completion
After daily use, thoroughly wash the machine with a
garden hose without a nozzle so contamination and seal
and bearing damage due to excessive water pressure will
be avoided. A brush may be used to remove caked-on
material. Use mild detergent to clean the covers. Applying
a coat of auto wax periodically will retain the cover's
glossy finish. After cleaning, inspect for machine damage,
oil leakage, component and tine wear.
Remove clean and oil the tines. Spray a light oil mist on
coring head bearings (crank & damper links).
Secure service latch if the aerator is to be stored for more
than a couple days.

Using Line Marker

Use the line marker to align aeration rows (Fig. 36).
1
Figure 36
1. Line marker (storage
position)
Adjusting Weight Transfer
The ProCore 648 is designed to transfer weight from the
traction unit to the coring head to help maintain hole
depth in various soil structures. However, if the soil
structure is firm enough to not allow full aeration depth
27
2
2. Line marker (alignment
position)