Nilfisk-ALTO 91WS - Manual (Page 29)

1-28 American-Lincoln
91 WS
WARNING
To prevent accidental starting, remove spark plug wire when servicing engine or equipment. Disconnect the
battery at the negative terminal if the engine has an electric starting system.
NOTE
Check the oil level regularly. Be sure correct oil level is maintained. Check every five (5) hours or daily before
starting the engine.
NOTE
Check the oil per the Service Chart Instructions previously listed. Change the oil after the five (5) hours of opera-
tion. Change the oil while the engine is warm. Refill with new oil of a recommended grade.
ENGINE AIR INTAKE SERVICE
1.
Loosen the cover screws. Remove the cover and air cleaner assembly from the base.
2. Remove the air cleaner assembly from the inside of the cover and disassemble.
3. To service the pre-cleaner, wash in a liquid detergent and water. Squeegee dry in a clean cloth. Saturate the
pre-cleaner in engine oil and use a clean, absorbent cloth to remove ALL EXCESS oil. If the pre-cleaner is
very dirty or damaged, replace it.
WARNING
Do not use petroleum solvents, e.g. kerosene, nor pressurized air, to clean the cartridge. Solvents will cause the
cartridge to deteriorate. Pressurized air can damage the cartridge.
4. Reassemble the retainer on the pre-cleaner and cartridge (screen side of pre-cleaner toward cartridge
pleats). Install this assembly in cover.
5. Insert tabs on cover into slots in base. Tighten cover screws securely.
FUEL FILTER SERVICE
The engine is equipped with an in-line fuel filter. As the in-line fuel filter is disposable, the only service required is
replacement every 100 hours. For more information regarding the fuel filter system, refer to the Briggs & Stratton
Owner’s Manual included with this Operator’s Manual.
PRE-CLEANER
RETAINER
C-0617
COVER
TAB
SLOT
BASE
CARTRIDGE
COVER
SCREWS (2)
C0617 FIGURE 19
SERVICE INSTRUCTIONS
ENGINE SERVICE INSTRUCTIONS