Onan NHC User Manual

CRANKCASE BREATHER
This engine uses a crankcase breather valve for
maintaining crankcase vacuum. If the crankcase
becomes pressurized as evidenced by oil leaks at the
seals, clean baffle pack and valve in a suitable
solvent. Check and clean valve screens and baffle
every 200 hours of operation. See Figure 4.
FIGURE 4. CRANKCASE BREATHER
AIR CLEANER
Cartridge Air Cleaner
Check and clean air cleaner element every 25 hours
(Figure 5). Clean by gently tapping element on a flat
surface. Replace the element every 200 hours. Clean
or replace more frequently in dusty operating
conditions.
Air Cleaner Wrapper (Pre-Cleaner [if used])
Wash in water and detergent and squeeze dry like a
sponge (Figure 5). Allow to dry, then coat evenly with
two tablespoons (28 grams) of SAE 30 engine oil.
Knead into and wring excess oil from pre-cleaner.
Reinstall over cartridge.
Failure to adequately wring out excess oil from the wrapper may
cause drop in engine horsepower due to an increased restriction of
inlet air.
WING NUT
COVER
OPTIONAL
^ POLYURETHANE
PRE-CLEANER
BREATHER TUBE
1. WASH
2. SQUEEZE DRY
3. COAT WITH OIL
4. INSTALL OVER PAPER ELEMENT
EXHAUST SYSTEM
Make regular visible and audible 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.
AWARNING
Inhalation of exhaust gases can
result in serious personal Injury or
death. Inspect exhaust system audibly and visually
for leaks daily. Repair any leaks immediately.
FIGURE 5. AIR CLEANER ASSEMBLY
8

Onan NHC Specifications

General

Brand	Onan
Model	NHC
Category	Engine
Language	English