Generac Power Systems GN190H, Руководство по обслуживанию и ремонту

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SECTION 6: ELECTRIC STARTERS AND BATTERIES
TORQUE SPECIFICATION
STARTER MOTOR WIRE NUT
84 INCH POUNDS
TESTING THE STARTER MOTOR
CHECKING THE PINION:
When the starter motor is activated, the pinion gear should
rise and engage the ring gear. If the pinion does not rise nor-
mally, inspect the large spiral threads of the sleeve and pinion
for binding or sticking.
TOOLS FOR STARTER PERFORMANCE TEST:
The following equipment may be used to complete a per-
formance test of the starter motor:
• A digital multimeter (VOM).
• A tachometer capable of reading up to 1,500 rpm.
• A fully charged 12-volt battery.
STARTER PERFORMANCE TEST:
1. Set the meter to read DC amps.
2. Connect the STARTER MOTOR, BATTERY and VOM as
shown in Figure 6.2.
Figure 6.2 — Starter Performance Test
3. Insert the tachometer at end of the pinion gear and acti-
vate the starter motor. A starter motor in good condition
will be within the following specifications:
STARTER MOTOR PERFORMANCE SPECIFICATIONS AT
12 VOLTS DC
MINIMUM MOTOR RPM = 800
MAXIMUM AMPS = 9
If the starter does not perform satisfactorily, it should be replaced.
BATTERY MAINTENANCE
GENERAL
Many of the batteries in use today are "maintenance free"
and require little or no maintenance. In most cases, battery
failure requires replacement of the battery. The lead-acid
cells found in many products, however, still require mainte-
nance. Maintenance of lead-acid batteries falls into three
categories:
• Inspecting the battery.
• Maintaining proper electrolyte levels.
• Charging the battery properly.
INSPECTING THE BATTERY:
Inspect the battery case for cracks or signs of damage.
Inspect battery terminals periodically and keep them clean.
NOTE: Always make sure that the battery is fully
charged.
ELECTROLYTE LEVEL:
Check the battery electrolyte level regularly. When level is
low, add distilled water to the correct level.
NOTE: After adding distilled water, do not check elec-
trolyte specific gravity until after the battery has been
recharged. Adding of sulfuric acid is NOT recommended.
If the battery has been recharged and specific gravity
is not correct, replace the battery.
TESTING A BATTERY
1. Visually inspect the battery case for cracks and other
defects. If damaged, replace the battery.
2. Check the electrolyte level in all battery cells.
a. If distilled water is added, recharge the battery before
taking a specific gravity reading.
b. Charge the battery until it is gassing freely, then take
the specific gravity reading.
3. Begin at one end of the battery and check the first cell,
using an automotive type battery hydrometer.
a. Take two or three samples from the cell to stabilize the
reading.