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Specications
Specications
Model Numbers
Serial Nos: 850,000 and Higher
NAV20KC; NAV27KC
Systems
Engine
• Engine Specications: See your Engine Owner’s
Manual
• RPM: Full Speed: 3600 ±50 RPM (No Load)
Idle: 1500 RPM
Fuel System
• Capacity: 7.5 gal. (28 L)
• Type of Fuel: Regular unleaded gasoline, 87
octane or higher; containing no more than 10%
methanol or ethanol.
• Fuel Filter: In-line 30 Micron Kohler P/N
2405010.
• Fuel Shut-Off Valve: 1/4 turn increments in-line
valve by fuel lter.
Electrical System
• Charging System: Flywheel Alternator
• Charging Capacity: 15 amps
• Battery Type: BCI Group U1
• Battery Voltage: 12 Volt
• Polarity: Negative Ground
• Fuses: Two 20 amp and one 30 amp blade type
• Safety Interlock System:
– PTO must be disengaged, brake engaged, and
speed control lever in neutral position to start
engine. (It is not necessary for the operator to
be in the seat to start the engine.)
– Operator must be in seat when PTO is
engaged, brake is disengaged, or speed control
lever is moved out of neutral or engine will
stop.
– Engine will stop in the following conditions:
◊ If the speed control lever is moved from
neutral position while brake is engaged.
◊ If the PTO is engaged while the hopper
is tilted up.
Operator Controls
• Steering and Motion Control:
– Speed Control lever, located on RH console,
sets maximum forward speed.
– Steering levers, centered in front of the seat,
control the speed and direction of travel of
the respective drive wheels.
– Moving speed control lever rearward to the
neutral position places the drive system in
neutral.
Note: The unit may be moved in reverse
while the speed control is in the neutral
position by pulling back on the steering levers.
• PTO Engagement Lever: Engages drive to PTO
(mower deck) and blower.
• Parking Brake Lever: Pull back to engage parking
brake.
Seat
• Type: Standard seat with high back, foam padded
(internal suspension).
• Mounting: Seat is hinged to tilt up for access to
hydraulic pumps and other components. The seat
is held in the tilted position with a link.
• Armrests: None.
• Seat Safety Switch: Internal to the bottom seat
cushion, non serviceable. Time delay module
incorporated into the Safety Interlock System
eliminates rough ground cut-outs.
Hydrostatic Ground Drive System
• Hydrostatic Pumps: Two Hydro Gear variable
displacement piston pumps.
• Wheel Motors: Hydro Gear planetary reduction
motors.
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