Onan CCK Series User Manual

72
MAINTENANCE AND REPAIR
cent segments. Rotate the armature slig'htlyand repeat the test. Con-
. Hnue until a
spark is obtained between all adjacent segments. If 110
spark is obtained at s.ome point, an open circuit is indicated. (NOTE-
A short circuit in the winding might prevent sparking, This condition
may be indicated by the
short circuit test described in the next para-
graph.) Replace an open circuited armature with a new one.
ARMA TURE SHORT CIRCUIT TEST. - To test for a short circuit, place
the armature in a growler. With
the growler current on, hold a steel strip about 1/2 inch above the arm-
ature laminations. Pass the strip back andforth over the laminations.
Cover as much of the lamination area as possible. If the strip is mag-
netic ally attracted to the armature at any point, a short Circuit is in-
dicated. After testing in one position, rotate thearmaturesHghtly in
the
growler and repeat the test. Continue until a complete revolution of
the armature in the growler has been made. Replace a short circuited
armature with a new one.
TESTING FIELD
WIl\TDINGS. - Use a test lamp set for all tests except
a
short circuit. The field ceils .of all
a c plants are saturated shunt weund, the Remote Start plants having
a
series field. winding in additien for cranking and battery charging pur-
poses. When testing a field coil assembly, disconnect all of its exter-
nal leads from their terminals. Tag and mark each lead te assure pro-.
per cennectionswhen reassembling.
TESTING FIELD WINDINGS FOR GROUNDS. - To test a coil assembly
fer a ground, disconnect
its exte:t:nal leads and teuch one test pred te the terminal of .one of its
leads and the ether test prod te the gene rater frame. If the lamp lights,
the ceil assembly ,being tested is grounded. The greund may be in a
coil,
ceil cennectien, .or ceil lead. Repair.or replace as needed.
TESTING FIELD
WINDINGS FOR OPENCIRCUIT. - To testa coil as-
. . . semblyfor an .open
circuit, disconnect its external leads and teuch .one test pred te the ter-
. minalof .one ceil winding lead, and the other test pred to the other lead
(.or leads) ·ef that coil winding. If the lamp does net light, the winding
being
tested is .open. If the fault lies in a connectien between ceils, or
ina ceil lead, the connection can be repaired. If it is inside the coil, re:-
place the entire ceil assembly with a new .one.
BALL BEARLl>{G. - If replacement of the armature ball bearing becomes
necessary,pull the bearing frem the shaft with a
suitable bearing puller. Be careful not to damage the armature shaft
because it must remain true te serve as a turning center when refinish-
ingthe c.ommutat.or .or c.ollect.orrings .. Drive the bearing on tothe
sheulder .on the shaft. Useadeuble-sealed pre-lubricated baH bearing.

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