Lubricate Brake Handle Pivot; Lubricate Brake Rod Bushings; Lubricate Steering Linkage Rod Ends; Lubricate Hopper Actuator - Exmark NAVIGATOR NV640KC Operator's Manual

Lubricate Brake Handle Pivot

Service Interval: Every 160 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Lubricate bronze bushings on brake handle
pivot with a spray type lubricant or light oil (see
Figure 8).
Figure 8
Left Side of Unit Shown
1. Brake Handle Pivot
2. PTO Handle Pivot
Lubricate Brake Rod
Bushings
Service Interval: Every 160 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Unhook seat latch and tilt seat up.
3. Lubricate bronze bushings on each end of brake
rod shaft with a spray type lubricant or a light oil
(bushings are located to the inside of the flange
bearings).
Lubricate Steering Linkage
Rod Ends
Service Interval: Every 160 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
3. Spring Arm Pivot
4. Toggle Pivot
2. Unhook seat latch and tilt seat up.
3. Lubricate each end of both steering linkage rods
with a spray lubricant or a light oil.

Lubricate Hopper Actuator

Service Interval: Every 160 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Raise hopper and locate actuator on right hand
side of mainframe.
3. Lubricate switch actuator rod with a spray
lubricant or a light oil.

Check Spark Plugs

Service Interval: Every 160 hours
Remove spark plugs, check condition and reset gaps,
or replace with new plugs. See Engine Owner's
Manual.
Change Fuel Filter
Service Interval: As required
A fuel filter is installed between the fuel tank and the
engine. Replace when necessary.
Replacement Filters
Kohler
Kohler EFI
Change Hydraulic System
Filter
Service Interval: After the first 250 hours
Note: Use only Exmark Part No. 109-0071 for
Summer use above 32°F (0°C) or P/N 1-523541
for Winter use below 32°F (0°C). (Refer to the
Hydrostatic Ground Drive System section in
Specifications for filter specifications.)
29
Maintenance
Kohler P/N 24 050 13
Kohler P/N 24 050 42
Every 500 hours/Yearly
(whichever comes
first) thereafter
(Every 250 hours/Yearly if
using Mobil 1 15W50)