Onan CCK Series User Manual

MA INT ENA NC E AND R EPA IR
71
TESTING WINDINGS. - A test lamp set and an armature growler are re-
. quired for the various tests. Before making any
tests, lift all brushes into their holders and disconnect the load circuit
wires from the plant. If the armature tests defective, the practical re-
pair is to replace it .. ' If a field coil tests defective, replace the entire
coil assembly unless the trouble is in one of the external leads. Then
it can be repaired as the nature of the trouble requires.
ARMATURE GROUND TEST. - To test the armaturefor a grounded
. condition,
liftor remove the brushes
,
so that. none contact thecomrtlutator or collector rings. Use a cantin&.
Ii
uity typetestlamp set .. Place one test prod onthe commutator, .and
the other test prod on a bare,clean part of the armature shaft. The
test prods must make good electrical contact. The test lamp should not
glow.
If the test lamp does glow, the dc winding or thecomrtlutator
is grounded. To testthe a c winding, place one test prod on One of
the collector rings and the other test prod on the armature shaft. li the
test lamp glows,the a c windingor a collector ring is grounded. Ite ...
ar
TEST LAMP
FOR JESTING FOR OPEN
CIRCUITS AND GROUNDS.
! -If.-
<1$£ 3 OJ? ... CANDL£POW£II .
, BULB.
FIG. 52-' CONTINUITY FIG. 53 - ARMATURE
TEST LAMP
GROWLER
ARMATUREOPEN CIRCUIT TEST.
• The
armature ac winding may
be
tested for an open circuit with-
out
removal ofthearmatur.e. Testing the de winding requires removal
and the use of an armature growler.
Totest the a c winding, be sure airbrushes are lifted or removed.
Use a test lamp set. Place one test prod oneach of the collector rings.
If the test lamp does not glow, the .a c winding is open circu,ited.
To test the d cwinding, place the armature in a growler. With the
growler current on; pass a smooth steel strip across the commutator ~. \
segments. Repeat all around the commutator. At some point around •
the commutator, a spark should occur as the strip contacts two adja.

Onan CCK Series Specifications

General

Fuel Type	Gasoline
Fuel System	Carburetor
Frequency	60 Hz
RPM	1800 RPM
Starting System	Electric or Recoil
Starting Method	Electric or Recoil Start
Voltage	120/240V
Compression Ratio	6.5:1
Ignition System	Battery Ignition
Phase	Single-phase