Check Spark Arrester (If Equipped); Thread Locking Adhesives; Copper-Based Anti-Seize; Dielectric Grease - Exmark Advantage Series 4500-466 Operator's Manual

Maintenance
WARNING
Engine compartment contains open belt
drives, fans, and other rotating components
that can cause injury. Fingers, hands, loose
clothing, or jewelry can get caught by the
rotating fan and drive shaft.
• Do Not operate machine without the
covers in place.
• Keep fingers, hands, and clothing clear of
rotating components.
• Shut off engine, wait for moving parts to
stop, engage parking brake and remove
key, before performing maintenance.
6. With the cap off the radiator, start the engine as
stated in the Operating Instructions Section.
7. Operate engine until the engine thermostat opens
and coolant is circulating through the radiator
core. As air is purged from the engine block and
the coolant level drops, add additional coolant to
the radiator.
8. When the radiator is completely full and no
additional coolant can be added, continue running
and install the radiator cap. Make sure that the
cap is completely seated by pressing down firmly
while turning until the cap stops. Once the cap is
installed, the engine may be stopped.
Check Spark Arrester
(if equipped)
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even after the engine is
stopped. Hot particles exhausted during
engine operation may ignite flammable
materials. Fire may result in personal injury
or property damage.
Do Not refuel or run engine unless spark
arrester is installed.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Wait for muffler to cool.
3. If any breaks in the screen or welds are observed,
replace arrester.
4. If plugging of the screen is observed, remove
arrester and shake loose particles out of the
arrester and clean screen with a wire brush (soak
in solvent if necessary). Reinstall arrester on
exhaust outlet.

Thread Locking Adhesives

Thread locking adhesives such as "Loctite 242"
or "Fel-Pro, Pro-Lock Nut Type" are used on the
following fasteners:
• ROPS spring pin housing.
• Hydro pump control arm, linkage bolt, and
attachment bolt.
• Hydro cooling fan screw.
• Hydro park brake cable anchor mounting bolt
• Sheave and clutch retaining bolt in the end of
engine crankshaft.
Thread locking adhesives are required for some
hardware on engines — see the Engine manual.

Copper-Based Anti-seize

Copper-based anti-seize is used in the following
location:
On threads of Blade Bolts. See Check Mower
Blades section.

Dielectric Grease

Dielectric grease is used on all blade type electrical
connections to prevent corrosion and loss of contact.
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