Generac Power Systems GTH1000, Руководство по обслуживанию

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6-4
2. Place battery in holder with flat base. Tighten hold down evenly
until snug. DO NOT overtighten.
3. Connect positive terminal to positive post FIRST to prevent
sparks caused by accidental grounding. Tighten connectors
securely.
4. Connect negative terminal to negative battery terminal. Tighten
connectors securely.
CHECKING BATTERY:
1. Physical check – clean if necessary.
a. Corrosion
b. Dirt
c. Terminal and clamps (secure – good condition)
2. Bring battery to full charge.
*
WARNING: DO NOT exceed charge rate of 1/10 ampere for
every ampere of battery rating. Consult battery manufacturer
for maximum charge recommendations.
a. Use a “Trickle” charge (automatically reduces charge
rate).
b. Fill non-sealed battery cells with distilled water after charging
(for batteries that have been in service).
Note: If battery gets “Hot” to the touch or is spitting acid (gassing)
excessively, unplug charger periodically.
3. With battery fully charged, check specific gravity readings of
each cell with a Battery Hydrometer and record readings (Figure
6-7). All readings should be above 1.250 (compensating for
temperature). If specific gravity readings varied 0.50 or if all cells
read less than 1.225, replace battery.
CHECK EACH CELL
AFTER CHARGING
USE A TEMPERATURE
COMPENSATED
HYDROMETER
Figure 6-7. Checking 12 Volt Battery Cells
TESTING BATTERY:
Set a digital multimeter to read DC Volts.
Attach RED meter test lead to po) battery terminal. Attach
BLACK meter test lead to negative (-) battery terminal. With ignition
switch “OFF,” press starter button. If ignition switch and starter switch
are the same switch, disconnect wires from spark plugs and ground
ignition using two Ignition Testers. Turn switch to “START.” Meter
should display 9 volts or more while cranking engine. If less than 9
volts is measured, replace battery.
*
CAUTION: Do not crank starter motor for more than 15 seconds
without allowing starter motor to cool at least 2 minutes.
BATTERY RECOMMENDATIONS:
The minimum battery size recommended is 450 CCA @ 0°F for
gasoline engines and 525 CCA @ 0°F for LP engines.
BATTERY CABLE RECOMMENDATIONS:
These cable sizes are based on total length of cable from battery
positive post to starter, plus ground return to battery negative post.
• #4 AWG — 1.8 meters (6 ft.) or less
• #2 AWG — 3.7 meters (12 ft.) or less
OPTIONAL WIRE HARNESS
Engines supplied with a wire harness have a Packard four or five
terminal plug on the harness (see Figure 6-12). A typical wire harness
consists of four colored wires as follows:
• A brown wire is used to signal low oil pressure. When low oil pres-
sure is detected, this wire becomes a ground. This is a normally
open switch. Some engines use a normally closed switch and will
work the opposite as stated above.
• A yellow wire is used to ground the ignition. Connect this wire to
ground and the ignition will be shut off.
• A white wire is connected to +12 Volts DC and the carburetor
solenoid, which allows fuel to flow. Turn off the +12 Volt supply,
and the fuel solenoid will close, stopping the flow of fuel.
• An orange wire (red on some models) is used to start the engine.
12 Volts DC to this wire and the starter solenoid will
engage. Turn off the +12 volt supply, and the starter will disengage.
Figures 6-8 through 6-10 show the proper connections for the wiring
harness and how it is routed.
SECTION 6: ELECTRIC STARTER