5.1.19Check spark plugs:

Service Interval: 160 hrs.

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

5.1.20Change 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 2405002

5.1.21Change 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.

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 5.1.8.

CAUTION

POTENTIAL HAZARD

Raising the mower deck for service or maintenance relying solely on mechanical or hydraulic jacks could be dangerous.

WHAT CAN HAPPEN

The mechanical or hydraulic jacks may not be enough support or may malfunction allowing the unit to fall, which could cause injury.

HOW TO AVOID THE HAZARD

DO NOT rely solely on mechanical or hydraulic jacks for support. Use adequate jack stands or equivalent support.

e)Raise the drive wheels off of the ground and support with jack stands (or equivalent support) just high enough to allow drive wheels to turn freely.

f)Start engine and move throttle control ahead to full throttle position. Move the speed control lever 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.

- 26 -

Page 31
Image 31
Exmark NAV27KC, NAV20KC manual Service Interval As Required, Service Interval After First 250 hrs Then yearly thereafter