Exmark Lawn Tractor manual Service Interval As Required, Service Interval 500 hrs

b)Remove cooling shrouds 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 shrouds are reinstalled. Operating the engine without cooling shrouds will cause engine damage due to overheating.

5.1.22Check spark plugs:

Service Interval: 160 hrs.

a)Remove spark plugs, check condition and reset gaps, or replace with new plugs. See Engine Owners Manual.

5.1.23Change fuel filter:

Service Interval: As Required

a)A fuel filter is installed between the fuel tanks and the engine. Replace when necessary with Kohler P/N 2405002.

5.1.24Change hydraulic system filter:

Service Interval: After First 250 hrs.

Then yearly thereafter

NOTE: Use only Exmark Part No. 1-513211 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.

b)Raise seat.

c)Carefully clean area around filter. It is important that no dirt or contamination enter hydraulic system.

d)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.

e)Fill reservoir as stated in Section 5.1.12.

f)Raise the rear of machine up and support with jack stands (or equivalent support) just high enough to allow drive wheels to turn freely.

g)Start engine and move throttle control ahead to full throttle position. Move the speed control levers to the full speed and run for several minutes. Shut down machine and recheck oil level.

Do not change hydraulic system oil (except for what can be drained when changing filter), unless it is felt the oil has been contaminated or been extremely hot.

Changing oil unnecessarily could damage hydraulic system by introducing contaminates into the system.

5.1.25Wheel hub - slotted nut torque specification.

Service Interval: 500 hrs

When tightening the slotted nut on the wheel motor tapered shaft:

a)Torque the slotted nut to 125 ft. lbs (169 N-M).

b)Check distance from bottom of slot in nut to inside edge of hole. Two threads (0.1”) or less should be showing.

c)If more than two threads (0.1”) are showing remove nut and install washer (PN 1-523157) between hub and nut.

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