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Service Intervals


Servicing Your Machine

IMPORTANT: Avoid damage! Operating in extreme conditions may require more frequent service intervals:

· Engine components may become dirty or plugged when operating in extreme heat, dust or other severe conditions.

· Engine oil can degrade if machine is operated constantly at slow or low engine speeds or for frequent short periods of time.


Please use the following timetables to perform routine maintenance on your machine.

Service Intervals

Break-In after 8 Hours

· Change engine oil.

· Change engine filter (Z425 and Z445).

Every 50 Hours or Annually

· Lubricate mower deck spindles (Z425 and Z445).

Every 100 Hours or Annually

· Change engine oil.

· Change engine filter (Z425 and Z445).

· Replace spark plugs.

· Replace air filter elements, both foam and paper.

· Replace fuel filter.

· Check mower belt.

· Sharpen / Replace blades.

· Clean underside of deck.

· Check tire pressure.

· Clean engine cooling fins.

Every 200 Hours

· Check / adjust engine valve clearance. See your John Deere dealer for this service.