User's Manual

48
SECTION 2. CHARGING SYSTEMS
Do not force or modify connectors. Test values are
identical to original 20 amp alternator system.
PRE-SERVICE CHECKS
a. Check for a good ground between regulator-rectifier
and mounting.
b. Check for poor connections or broken wires.
c. Check the fuse.
NOTE: Battery voltage must be above 6 volts for
the regulator to be activated. This applies only to
the 20 amp system with regulator-rectifier in housing.
20 AMP. ALTERNATOR SYSTEM
10 AMP. ALTERNATOR SYSTEM 20 AMP. ALTERNATOR SYSTEM
ALL INDICATED GROUNDS ARE TO
ENGINE ALL GROUND CONNECTIONS TO
BE CLEANED TO A BRIGHT FINISH
SAFETY STANDARDS MAY REQUIRE AN
OVER LOAD PROTECTION DEVICE ON
BATTERY FEED SIDE OF SWITCH IN
ADDITION TO OR IN LIEU OF FUSE
SHOWN ON DIAGRAM
BATTERY RECOMMENDED MIN SIZE 32
AMPERE HOUR LARGER SIZE REQUIRED
FOR COLD TEMPERATURE OPERATION
50 AMPERE HOUR
MAGNETO SHUT OFF LEAD
GREEN
VIEW B B
VIEW A A
D.C. OUTPUT LEAD
RED
STARTING MOTOR
GREEN
RED
FUSE
SOLID STATE RECTIFIER
REGULATOR MOUNTED
ON ENGINE (PROVIDED
BY TECUMSEH)
GROUND IS THRU THE
MOUNTING BOLTS
AMMETER
LIGHT ETC.
KEY SWITCH
SOLENOID
SWITCH
BATTERY
OFF - MAGNETO TO GROUND, ACCESSORY TO GROUND ALL OTHERS OPEN.
RUN - RECTIFIER TO BATTERY, ACCESSORY TO BATTERY. ALL OTHERS OPEN.
START - BATTERY TO SOLENOID. ALL OTHERS OPEN.
OFF - MAGNETO TO GROUND ALL OTHERS OPEN.
RUN - MAGNETO OPEN, RECTIFIER BATTERY, BATTERY TO LIGHTS.
START - BATTERY TO SOLENOID.
KEY SWITCH
AMMETER
BATTERY
SOLENOID
STARTING MOTOR
GROUND IS THRU MT’G BOLTS
MAGNETO
GROUND
A.C.
A.C.
A.C.
A.C.
LIGHT ETC.
SWITCH
GROUND IS THRU
MT’G SCREWS
SOLID STATE
RECTIFIER-
REGULATOR
BATTERY
KEY SWITCH
AMMETER
BATTERY
SOLENOID
GROUND IS THRU
THE MOUNTING
BOLTS
STARTING MOTOR
A.C. (YELLOW
LEADS)
VIEW A A
VIEW F F
MAG. GROUND
(GREEN LEAD)
30 AMP FUSE
LIGHT ETC.
GROUND IS THRU
MT’G SCREWS
A.C.
B+
SWITCH
PRECAUTIONS
CAUTION: Electrical components of the 10 amp
alternator system are similar to the 20 amp alternator
system. Use care not to interchange electrical
components; severe damage will result.
A. Do not connect battery to cables in wrong polarity.
This will cause regulator-rectifier damage.
B. Break continuity between the regulator-rectifier
unit and battery when using a remote charger
on the battery. This will eliminate damage to the
regulator-rectifier if polarity is reversed.
C. Disconnect wiring harness at regulator-rectifier
before using arc welder on equipment.
D. Do not short alternator leads together.
E. When normally running the engine DO NOT
disconnect the lead to the battery.
NOTE: Only when testing the D.C. output, should
the D.C. output lead be disconnected from the
battery.
F. If wiring must be replaced in any part of the circuitry,
be certain the same size (gauge) wire is used.
Wire between the battery to the starter motor
must be a minimum of No. 6 gauge. For the 20
amp alternator system the charge circuit uses
No. 14 gauge wire. Most of the remaining portion
of the circuitry will be No. 18.
Newer 20 amp systems are distinguished by the
regulator-rectifier installed in the blower housing.
Connectors are not interchangeable with connectors
on the external type regulator-rectifier 20 amp system.