SAFETY
Safety - 16
California Proposition 65
Attention
It is a violation of California Public Resource Code
Section 4442 or 4443 to use or operate this engine
on any forest-covered, brush-covered, or grass-
covered land unless the exhaust system is equipped
with a spark arrestor, as dened in Section 4442
maintained in eective working order or the engine
is constructed, equipped, and maintained for the
prevention of re.
Warning
Operating, servicing, and maintaining o-road
equipment can expose you to chemicals including
engine exhaust, carbon monoxide, phthalates, and
lead, which are known to the State of California to
cause cancer and birth defects or other reproduc-
tive harm. To minimize exposure, avoid breathing
exhaust, do not idle the engine except as necessary,
service equipment in a well-ventilated area and
wear gloves or wash your hands frequently when
servicing your equipment.
For more information go to www.P65Warnings.ca.gov
Operator Safety Interlock System
The 4520 power unit is equipped with a safety interlock system. This system:
• Prevents the engine from starting unless the parking brake is engaged and the SDLA control is in neutral.
• Prevents the PTO from starting if the operator is not in the seat.
• Prevents the power unit from driving if the parking brake is engaged.*
• Shuts o the PTO if the operator leaves the seat.
• Shuts o the engine (and fuel pump) if the operator leaves the seat without engaging the parking brake.
• Shuts o the engine if the forward / reverse controls (SDLA lever or foot pedal) are moved from neutral
while the parking brake is engaged.
* The parking brake must be completely disengaged before moving the SDLA lever forward or backward or the power unit engine will shut o.
Testing the Safety Interlock System
WARNING
Never operate the power unit if the safety interlock
system is malfunctioning. Do not disengage or by-
pass any switch. Failure to heed this warning could
result in injury to yourself or others, or damage to
property.
WARNING
The parking brake must be disengaged during por-
tions of the safety interlock system test. Place wheel
chocks in front and back of the wheels to prevent
the power unit from moving.
CAUTION
The daily inspection should be performed prior to
initial startup for the day.
Perform the following safety interlock tests daily to test the electrical portion of the interlock system. Before
testing, park the power unit on a level surface, place wheel chocks in front and back of the wheels, and place
the high/low range shift lever in the neutral position. After testing is complete, place the high/low shift lever in
either high or low range, engage the parking brake, and remove the wheel chocks.
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