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• DO NOT SMOKE when near the battery;
• DO NOT cause flame or spark in battery area; and
• Discharge static electricity from your body before
touching the battery by first touching a grounded
metal surface.
Be sure the Auto/Off/Manual switch is set to
!
the OFF position before connecting the battery
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as
the battery cables are connected.
Be sure the utility power supply is turned off,
or sparking may occur at the battery posts as
you attach the cables and cause an explosion.
4.2
ENGINE PROTECTIVE DEVICES
Unlike an automobile engine, the generator may have
to run for long periods of time with no operator in the
vicinity to monitor engine conditions. For that rea-
son, the engine is equipped with several devices
which protect it against such potentially damaging
conditions as (a) low oil pressure and (b) high tem-
perature.
4.2.1 AUTOMATIC LOW OIL PRESSURE
SHUTDOWN
The engine is equipped with a normally closed (N.C.)
contacts oil pressure switch (Figure 18). Engine oil
pressure holds the switch open during cranking and
operating. Should oil pressure drop below about 10
psi, switch contacts close and the engine shuts down.
4.2.2 HIGH TEMPERATURE SWITCH
Switch (Figure 4.1) contacts close if temperature
should exceed about 285 F (140 C) to initiate an
engine shutdown.
Figure 4.1 — Engine Protective Devices
16 Generac
®
Power Systems, Inc.
Section 4 — Maintenance
Generac APS 6.0 DC Auxiliary Power System
4.2.3 CHECKING ENGINE OIL LEVEL
To check the engine oil level, proceed as follows
(Figure 4.2):
1. Remove dipstick and wipe it dry with a clean
cloth.
2. Install and tighten dipstick cap, then remove
again. Oil level should be at the dipstick "full"
mark. If necessary add oil to the "full" mark only.
DO NOT FILL ABOVE THE "FULL " MARK.
3. Install and tighten the dipstick.
Figure 4.2 — Oil Dipstick and Filler Tube
Oil Fill
Oil Level
Dipstick
Oil Drain
Hose
Never operate the engine with oil level below
!
the ADD mark on dipstick. Doing this could
damage the engine.
4.3
CHANGE ENGINE OIL
Change engine oil after the first 25 hours of opera-
tion. Thereafter, change oil every 100 operating
hours. Change oil more frequently if operating con-
sistently under heavy load or at high ambient tem-
peratures. To change oil, proceed as follows:
1. Run engine until it is thoroughly warmed up, then
shut OFF the engine.
2. Immediately after the engine shuts OFF , pull OIL
DRAIN HOSE (Figure 4.2) free of its retaining
clip. Remove CAP from hose and drain oil into
suitable container.
3
When oil has drained, install cap onto end of oil
drain hose. Retain hose in clip.
4. Refill with proper recommended oil (see Page 15).
Oil Filter
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