Onan NHC User Manual

AWARNING
Accidental starting of the engine
can cause severe personal injury or
death. Disconnect the battery cable when repairs are
made to the engine, controls panel, or associated
equipment.
DAILY CHECKS OR EVERY 8 HOURS
The operator should daily make a complete visual
and audible inspection of the engine. Check the
following before starting the engine for the first time
each day:
1. Check all fuel lines and fittings for possible
leakage.
2. Inspect exhaust system for possible leakage and
cracks. Locate leaks in muffler and piping while
the engine is operating. Repair all leaks imme¬
diately after they are detected for personnel
safety.
3. Inspect air cleaner system for leaks. Make certain
that all clamps and fittings are tight and free of
potential leaks.
4. Check crankcase oil level with the engine off If oil
level is at or below “add” mark on dipstick (Fig¬
ure 1), add sufficient oi I of the proper viscosity as
specified in the ENGINE SET-UP section to bring
oil level to the full mark on the dipstick. Do not
operate engine with oil level below the “add”
mark.
Allow a minimum of 10 minutes for the oil to drain down
before checking. The best time to check the oil is after an
overnight shut-down period.
OIL CHANGE
Change crankcase oil after the first 25 hours of
operation and every 50 hours thereafter. If operating
in extremely dusty, high ambient, or low ambient
conditions change oil more often.
Run engine until thoroughly warm before draining
oil. Stop the engine, place a pan under the drain
outlet and remove the oil drain plug or open the drain
valve. After the oil is completely drained, replace the
drain plug or close the drain valve. Refill with oil of the
correct API classification and appropriate SAE vis¬
cosity grade for the temperature conditions (refer to
ENGINE SET-UP section).
AWARNING
Hot crankcase oil can cause burns if
it is spilled or splashed on skin.
Keep fingers and hands clear when removing the oil
drain plug and wear protective clothing.
Oil level should be to the “full” mark of the dipstick.
Start engine and run for a short time to check for oil
leaks around the drain plug.
OIL FILTER CHANGE
Replace oil filter (Figure 2) after the first 25 hours of
operation, and every 100 hours thereafter. If opera¬
ting in extremely dusty, high ambient, or low ambient
conditions change oil filter more often.
Spin off oil filter element and discard it. Thoroughly
clean filter mounting surface and install new element,
making sure new gasket is inserted in the element.
Apply a thin film of oil to the gasket. Spin element
down by hand until gasket just touches mounting pad
and then turn down an additional 174-1/2 turn. Do not
overtighten.
FIGURE 1. CRANKCASE OIL FILL
FIGURE 2. OIL FILTER
6

Onan NHC Specifications

General

Brand	Onan
Model	NHC
Category	Engine
Language	English