Onan CCKA User Manual

Battery Charging System
BATTERY CHARGING, FLYWHEEL
ALTERNATORS
. Keep the battery terminals clean and tight. After
The flywheel alternator is a permanent magnet alter- maktng connections, coat the terminals with a light
nato rand uses a so! id-state voltage regulator-rectifier application of petroleum jelly or grease to retard
for controlling output. Figure 38. corrosion.
Weak ignition spark or a discharged battery indicate
trouble in the charging system. But before testing the
engine’s charging system, always check the battery
for serviceability.
Check battery cells to make sure they are filled to
appropriate level adding distilled water as required.
Check specific gravity in each cell. Specific gravity
should be 1.265 at 80° F; if not, recharge battery to
bring it up to this level.
Poor contact at the battery cable connections is often a source of
trouble. Make sure battery cables are in good condition and that
contacting surfaces are clean and tightly connected. Do not
reverse battery leads. Use recommended battery tools when
disconnecting leads to avoid mechanical battery damage.
Keep the battery case clean and dry. An accumulation
of moisture will lead to a more rapid discharge and
battery failure.
STATOR
Keep these points in mind when testing or servicing
the flywheel alternator:
1 Be sure the output control plug (connector) is
inserted properly. The plug must bottom in
receptacle — eliminates any resistance due to a
poor connection. Keep clean and tight.
2. Make sure the alternator stator leads are not
shorted together.
3. Be sure regulator-rectifier output control has a
good ground connection. Mating surface for
mounting must be clean and fasteners tightened'
properly.
4. Never reverse the battery leads.
Charging system tests require s fully charged battery.
MOUNTED ON
CYLINDER COVER
FIGURE 38. 15 AMP SYSTEM
41

Onan CCKA Specifications

General

Cylinders	2
Ignition System	Battery ignition
Engine Type	4-cycle
Bore	3.25 in (82.55 mm)
Power Output	Varies with model. e.g., 6.5 kW (CCK)
Horsepower	10 hp
Starter	Electric