Maintenance. Exmark PIONEER PNS20KA443, PIONEER PNS22KA483, PIONEER PNS24KA523, PIONEER S-SERIES Operators

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Maintenance. Exmark PIONEER PNS20KA443, PIONEER PNS22KA483, PIONEER PNS24KA523, PIONEER S-SERIES Operators | Manualzz



Note: Determine the left and right sides of the machine from the normal operating position.


While maintenance or adjustments are being made, someone could start the engine.

Accidental starting of the engine could seriously injure you or other bystanders.

Remove the key from the ignition switch, engage parking brake, and pull the wire(s) off the spark plug(s) before you do any maintenance. Also push the wire(s) aside so it does not accidentally contact the spark plug(s).


The engine can become very hot. Touching a hot engine can cause severe burns.

Allow the engine to cool completely before service or making repairs around the engine area.

Recommended Maintenance Schedule(s)

Maintenance Service


After the first 5 hours

After the first 100 hours

Before each use or daily

Every 25 hours

Every 50 hours

Every 100 hours

Every 200 hours

Every 500 hours


Maintenance Procedure

• Change the engine oil.

• Change the hydraulic filter and fluid.

• Check the engine oil level.

• Check the mower blades.

• Check the safety interlock system.

• Check the rollover protections systems (roll bar) knobs.

• Check the seat belt.

• Check for loose hardware.

• Check the hydraulic oil level in the expansion tank.

• Clean the engine and exhaust system area.

• Clean the hydro fan cooling guards.

• Clean the grass and debris build-up from the machine and cutting deck.

• Clean the grass build-up from under the cutting deck.

• Grease the front caster axles.

• Check the tire pressures.

• Check the condition of the belts.

• Grease the deck and pump idler pivot.

• Check spark arrester (if equipped).

• Check the air cleaner; replace if dirty or damaged. (May need more often under severe conditions. See the Engine Owner's Manual for additional information.)

• Change the engine oil. (May need more often under severe conditions.)

• Remove the engine shrouds and clean the cooling fins.

• Check the spark plugs.

• Replace the emissions air intake filter.

• Change the hydraulic filter and fluid (Every 250 hours if using Mobil 1 15W50)

• Check the park brake adjustment.

• Check the battery charge.



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