Air Filter Blockage Indicator
To test the air cleaner blockage indicator (Figure 10) run the engine at full speed for a short time. If the rubber bellows is pulled inwards (down), and the green rubber band cannot be seen, this implies that maintenance work is required on the air cleaner. Clean or replace air cleaner.
MQ41TDH — MAINTENANCE
To clean or replace air filter loosen the wing nut on the air filter housing (Figure 11), remove the cover and take out air filter cartridge. If only cleaning of the air filter is desired blow through the air filter cartridge from the inside, moving a jet of dry compressed air up and down until all dust is removed.
AIR FILTER
CANNISTER
CLEAN USING
COMPRESSED
DRY AIR 
| AIR FILTER |
Figure 10. Air Filter Blockage Indicator | CARTRIDGE |
| WING NUT |
| Figure 11. Air Filter |
Air Filter Cartridge
If engine is operating in very dusty and dry grass conditions. A clogged air filter will result in high fuel consumption, loss of power and excessive carbon buildup in the combustion chamber.Clean air filter daily.Remember if operating in dusty conditions, check the rubber bellows on the air blockage indicator several times a day.
CAUTION :
DO NOT blow high pressure, high velocity compressed air thru the air filter cartridge.The high velocity air will damage the filter, which will then allow contaminates to pass into the engine.
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