Exmark Viking Hydro Operator's Manual page 24

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h) Remove jack stands (or equivalent support) and lower deck to ground.
5.1.4 Check safety interlock system.
Service Interval: Daily
a) For your safety, your Exmark mower is equipped with Operator Presence
Controls (OPC). When either the mower blades are engaged, or the
speed control lever is not in neutral and both hands are removed from the
handles, the mower engine MUST stop.
b) Check OPC circuits. Clear the area. Run engine at one-third throttle, then
with drive levers and neutral lock latches in neutral lock position, move
the speed control lever out of neutral and release OPC levers - engine
MUST stop.
Again, run engine at one-third throttle, move the speed control lever to
neutral, engage blade clutch and releaseOPC levers - engine MUST
stop.
c) If machine does not pass any of these tests, DO NOT operate. Contact
your authorized EXMARK SERVICE DEALER.
IMPORTANT: It is essential that all Operator Safety Mechanisms be
connected and in proper operating condition prior to the use of the
mower.
5.1.5 Check for loose hardware.
Service Interval: Daily
a) Stop engine and remove spark plug wire(s).
b) Visually inspect machine for any loose hardware or any other possible
problem. Tighten hardware or correct the problem before operating.
5.1.6 Service pre-cleaner element and air cleaner.
Service Interval: See Engine Owner's Manual
5.1.7 Change engine oil.
Service Interval: See Engine Owner's Manual
NOTE: Change oil after first five (5) hours of operation. Follow engine
manufacturers recommendations for future oil changes.
a) Disengage blade clutch.
b) Stop engine and remove spark plug wire(s).
c) Drain oil while engine is warm from operation.
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FIG. 6
BLADE BOLT INSTALLATION
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