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ProCore 648 Page 3 – 7 Kohler Engine
Service and Repairs
Cooling System
To ensure proper engine cooling, make sure the grass
screen, cooling fins and other external surfaces of the
engine are kept clean at all times.
NOTE: Perform this maintenance procedure at the in-
terval specified in the Operator’s Manual.
IMPORTANT: The engine that powers the ProCore
648 is air–cooled. Operating the engine with dirty or
plugged cooling fins, a blocked grass screen or a
plugged or dirty blower housing will result in en-
gine overheating and engine damage.
1. Park machine on a level surface, fully raise coring
head, engage parking brake, stop engine and remove
key from the ignition switch.
IMPORTANT: Never clean engine with pressurized
water. Water could enter and contaminate the fuel
system.
2. Clean cooling fins on both cylinder heads.
3. Clean grass screen and blower housing of dirt and
debris (Fig. 4).
4. If blower housing removal is necessary for cooling
system cleaning, engine needs to be removed from ma-
chine (see Engine Removal and Installation in this sec-
tion).
IMPORTANT: Never operate engine without the
blower housing installed. Overheating and engine
damage will result.
5. Make sure grass screen and blower housing are re-
installed to the engine if removed.
Figure 4
1. Cylinder head
2. Grass screen
3. Blower housing
1
3
2
1
Kohler
Engine