International Harvester Company TD-24 Operator's Manual page 39

PREVENTIVE MAINTENANCE
t
CHECKING MECHANICAL PROBLEMS OF
ELE;CTRI~AL GENERATING SYSTEM
,
Probable Remedy
Problem
AMMETER SHOWS
NO CHARGE WlTH
ENGINE
OPERATING
Probable Cause
-B--Ammeter inoperative.
A-,-Connections loose or corroded. A--Clean and tighten connections.
C--Generator inoper~tive.
D--Relay inoperative.
B--Turn, on bright lights; if ammeter
shows no discharge, ammeter pr-obably
is_inoperative.
*
C--Place jumper lead from "GEN" ter-
minal on relay
to
uppe r radiator tank;
if no flash, genes-ato.r is inoperative.
*
D--*
AMMETER SHOWS
NO CHARGE UNTIL
HIGH SPEED
A--Relay adjusted to operate at
too high closing voltage.
A--*
AMMETER SHOWS
EXCESSIVE
CHARGE
A--Batteries run down.
B--Batteries faulty. B--Replace batteries.
A--Recharge .batte r ie s .
C--Generator field grounded. _C--Check for external ground and correct.
E--Generator field shorted.
D--Voltage control unit defective. D--Replace.
*
E,--Replace generaior.
*
AMMETER SHOWS
DISCHARGE
WITH ENGINE
OPERATING
A--Generator belts loose.
B--Short circuits.
C--Generator inoperative.
D--Relay inoperative.
A--'I'ighten belts.
B--*
C--Place jumper lead from" GEN" ter-
minal on relay
to
upper radiator tank;
if no flash, generator
is inopera,tive.
D--*
•
III I
AMMETER POINTER
FLUCTUATES
RAPIDLY
A--Shorted or loose connections.
B--Generator defective.
C--Generator drive belts loose.
A--Check for Shorted circuits and tighten
connections. '
B--*
C--Adjust belts; replace if necessary.
D-- Low idling speed. D--Adjust idling speed.
*
AMMETER SHOWS
HEAVY DISCHARGE
WITH ENGINE
NOT OPERATING
A--Relay contacts stuck. A--Disconnect cable from "BAT'" terminal
on relay; if ammeter
'returns to zero,
relay contacrs ar.e s'tuck,
*
*
Consult Your International Industrial Pewer Distributor or Dealer
37