Specifications, Model Numbers, Systems

Specifications

Model Numbers

Serial Nos: 790,000 and Higher

NAV20KC; NAV27KC

Systems

Engine

•Engine Specifications: 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.

•Fuel Filter: In-line 30 Micron Kohler P/N 2405010.

•Fuel Shut-Off Valve: 1/4 turn increments in-line valve by fuel filter.

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:

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.

–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.

•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.

•Hydraulic Oil Type: Use Exmark Premium Hydro oil.

•Hydraulic Oil Capacity: 4.0 qt. (3.8 L)