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Removal (Fig. 7)
Installation (Fig. 7)
CAUTION
haust system.
The muffler and exhaust pipe may be hot. To
avoid possible burns, allow the engine and ex-
haust system to cool before working on the ex-
1. Park machine on a level surface, fully raise coring
head, engage parking brake, stop engine and remove
key from the ignition switch. Secure coring head with
service latch.
2. Remove fasteners that secure exhaust heat shield
to machine (flange head screw and two (2) cap screws
with lock washers). Remove heat shield from machine.
3. Loosen muffler clamps that secure muffler and ex-
haust elbow.
4. Remove two (2) flange nuts that secure muffler to
frame. Retrieve two (2) carriage screws. Remove muf-
fler and exhaust elbow from machine.
5. If exhaust manifold removal is required, remove four
(4) hex nuts from the exhaust manifold studs on engine.
Separate the exhaust manifold from the engine.
6. Remove exhaust gaskets.
NOTE: Make sure exhaust manifold and engine seal-
ing surfaces are free of debris or damage that may pre-
vent a tight, leak–free seal.
1. If exhaust manifold was removed, place exhaust
gaskets on the engine exhaust manifold studs. Secure
exhaust manifold to engine with four hex nuts. Torque
hex nuts from 17 to 21 ft–lb (23.1 to 28.5 N–m).
IMPORTANT: Finger tighten all exhaust system
fasteners before securing so there is no preload on
exhaust components.
2. Position muffler clamps over exhaust elbow and
muffler inlets.
3. Slide exhaust elbow onto exhaust manifold and then
slide muffler onto elbow.
4. Secure muffler to frame with two (2) carriage screws
and flange nuts.
5. Tighten muffler clamps.
6. Position exhaust heat shield to machine and secure
with flange head screw and two (2) cap screws with lock
washers.
7. Return coring head service latch to stored position
before using machine.
Kohler
Engine
ProCore 648 Page 3 – 11 Kohler Engine