AIR
CLEANER
The NHC engine uses a replaceable, spin-on air
cleaner/ Figure 10. Remove and replace every 200
hours.
CAUTION
cause severe damage to engine parts.
Do not run engine with air cleaner removed.
Intake of dirty air or solid materials could
AIR
CLEANER
FIGURE 10. AIR CLEANER
GOVERNOR
LINKAGE
The linkage must be able to move freely through its
entire travel. Every 50.hours of operation clean the
metal joints as shown in Figure 11. Also inspect the
linkage for binding, excessive slack and wear.
Clean and lubricate metal ball joints. Don't lubricate plastic joint^
KEEP
GOVERNOR
LINKAGE
LUBRICATED
REDUCTION
GEAR
DRIVE
Drain the gear box after the first 100 hours of
operation and refill with fresh lubricant of the
recommended grade. Repeat this procedure every six
months thereafter, or every 100 hours.
Use only SAE 50 motor oil orSAE 90 mineral gearoil.
Do not use lubricants commonly known as extreme
pressure lubricants, hypoid lubricants, etc.
Maintain the proper oil level between changes. Over-
filling will cause foaming, which can lead to an oil leak
due to overheating. Remove the filler plug on top of
the case and theoil level plug from the face of the gear
case.
Fill the case until the oil just begins to flow from
the oil level plug hole. Gear box holds 1/2 pint U.S.
measure. Replace both plugs. See Figure 12.
VENT PLUG
FILL WITH OIL TO
LEVEL OF HOLE
FIGURE 12. REDUCTION GEAR DRIVE
EXHAUST
SYSTEM
Make regular inspections of the exhaust system
throughout the entire life of the engine. Locate leaks
in muffler and piping while the engine is operating.
Repair all leaks immediately after they are detected
for personnel safety.
WARNING
Leaky exhaust systems emit noxious carbon
monoxide fumes which are a potential safety
FIGURE 11. GOVERNOR LINKAGE
hazard in enclosed areas.
BATTERY
Check charge condition. Check electrolyte
level.
Add
distilled water to keep electrolyte at its proper level .-In
freezing weather, run engine immediately after ad-
ding water. Keep battery.connections tight and clean. ..
15
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