Exmark NAV20KC - Manual (Page 31)

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c) 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).
4.1.16 Lubricate steering linkage rod ends:
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage parking
brake.
b) Tilt seat up.
c) Lubricate each end of both steering linkage rods with a spray lubricant or a light
oil.
4.1.17 Remove engine shrouds and clean cooling fins:
Service Interval: 80 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Remove cooling shroud clean-out covers from engine and clean cooling fins.
Also clean dust, dirt, and oil from external surfaces of engine, which can cause
improper cooling.
c) Make sure cooling shroud clean-out covers are reinstalled. Operating the
engine without cooling shroud clean-out covers will cause engine damage due
to overheating.
4.1.18 Check spark plugs:
Service Interval: 160 hrs.
a) Remove spark plugs, check condition and reset gaps, or replace with new
plugs. See Engine Owners Manual.
4.1.19 Change fuel filter:
Service Interval: As Required
a) A fuel filter is installed between the fuel tank and the engine. Replace when
necessary.
Replacement Filters Kohler P/N 2405010
4.1.20 Change hydraulic system filter:
Service Interval: After First 250 hrs.
Then yearly thereafter
NOTE: Use only Exmark Part No.109-0071 for summer use above 32
°
F (0°C)
or Part No. 1-523541 for winter use below 32
°
F (0°C).
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Carefully clean area around filter. It is important that no dirt or
contamination enter hydraulic system.
c) Unscrew filter to remove and allow oil to drain from reservoir.
IMPORTANT: Before reinstalling new filter, fill it with Mobil 1 15W-50 and
apply a thin coat of oil on the surface of the rubber seal.
Turn filter clockwise until rubber seal contacts the filter adapter, then
tighten the filter an additional 2/3 to 3/4 turn.
d) Fill reservoir as stated in Section 4.1.8.