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SPECIFIC GRAVITY
1.220
1.200
1.160
ADDING WATER:
Water is lost from a battery as a result of charging
and discharging and must be replaced. If the water is
not replaced and the plates become exposed, they
may become permanently sulfated. In addition, the
plates cannot take full part in the battery action unless
they are completely immersed in electrolyte. Add only
DISTILLED WATER to the battery. DO NOT USE
TAP WATER.
NOTE: Water cannot be added to some "mainte-
nance-free" batteries.
CHECKING BATTERY STATE OF CHARGE:
Use an automotive type battery hydrometer to test the
battery state of charge. Follow the hydrometer manu-
facturer's instructions carefully. Generally, a battery
may be considered fully charged when the specific
gravity of its electrolyte is 1.260. If the hydrometer
used does not have a "Percentage of Charge" scale,
compare the readings obtained with the following:
SPECIFIC GRAVITY
1.260
1.230
1.200
1.170
CHARGING A BATTERY:
Use an automotive type battery charger to recharge a
battery. Battery fluid is an extremely corrosive, sulfu-
ric acid solution that can cause severe burns. For that
reason, the following precautions must be observed:
❏ The area in which the battery is being charged must
be well ventilated. When charging a battery, an
explosive gas mixture forms in each cell.
❏ Do not smoke or break a live circuit near the top of
the battery. Sparking could cause an explosion.
❏ Avoid spillage of battery fluid. If spillage occurs,
flush the affected area with clear water immediately.
❏ Wear eye protection when handling a battery.
7.5 AMP FUSE
This panel-mounted Fuse
protects the DC control
circuit against overload
and possible damage. If
the Fuse has melted open
due to an overload, nei-
ther the priming function
nor the cranking function
will be available.
FREEZING POINT
-35° F. (-37° C.)
--20° F. (-29° C.)
0° F. (-18° C.)
PERCENTAGE OF CHARGE
100%
75%
50%
25%
Figure5-3
ENGINE DC CONTROL SYSTEM
FUEL PRIMER SWITCH
Following generator installation and after the unit has
been idle for some time, the fuel supply line may be
empty. This condition will require a long cranking peri-
od before fuel can reach the carburetor. The Fuel
Primer Switch, when actuated to its "PRIME" position
will deliver battery voltage across the closed switch
contacts to the Fuel Pump (FP) to turn the Pump on.
Pump action will then draw fuel from the supply tank
to prime the fuel lines and carburetor.
Figure 5-4. – Primer Switch
START-STOP SWITCH
The Start-Stop Switch allows the operator to control
cranking, startup and shutdown. The following wires
connect to the Start-Stop Switch:
1. Wire No. 17 from the Engine Controller circuit board. This Is
the CRANK and START circuit. When the Switch is set to
'START", Wire 17 is connected to frame ground via Wire OB.
a.
With Wire 17 grounded, a Crank Relay on
the circuit board energizes and battery volt-
age is delivered to the Starter Contactor via
Wire 56. The Starter contactor energizes,
its contacts close and the engine cranks.
b.
With Wire 17 grounded, a Run Relay on the
circuit board energizes and battery voltage
is delivered to the Wire 14 circuit. Battery
voltage is delivered to the Fuel Pump, Fuel
Solenoid, Choke Heater and the Remote
Harness.
2. Wire 18 from the Engine Controller board. This Is the
ENGINE STOP circuit. When the Start-Stop Switch is set to
"STOP", Wire 18 is connected to frame ground via Wire No.
0B. Circuit board action then opens the circuit to Wire 14, and
grounds Wire 18A. Fuel flow to the carburetor and ignition
are terminated.
3. Wire 0B connects the Switch to frame ground.
Section 5
Page 19
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Troubleshooting
