Dixon SZ4619 CA Operator's Manual page 58

SERVICE JOURNAL
Action
Date, mtr reading,
stamp, sign
At least once each year
Clean the engine's cooling air intake.
Replace the air cleaner's pre-filter (foam).
Replace the air filter's paper cartridge.
Change the engine oil.
Replace the engine oil filter.
Check/adjust the cutting height.
Check/adjust the parking brake.
Clean/Change the spark plugs.
Replace the fuel filter.
Check the engine valve clearance.
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