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CCK (SPEC R), MCCK (BEGIN SPEC E),
AND NH (SPEC D THROUGH F) MODELS
Controls Without Start Disconnect Adapter
Switch AlS2, when moved to START, closes a circuit
through diode AlCR1, switch A1S1 and to terminal 6.
This energizes ignition coil T1, electric fuel pump E l
(when used), and fuel solenoid K2 (when used).
This description refers to CCK and NH generator sets,
but applies for the most part to the MCCK generator set
(begin Spec E) as well. See Figure 3-3.
When switch A1S2 closes, transistor A1Q2 turns on,
energizingterminal 9 and start solenoid K1. K1 contacts
close, connecting the battery to the generator, which
acts as a motor and cranks the engine. If proper coil
voltage and fuel are available, the engine starts and
accelerates to governed speed. On some models, start
solenoid K1 also energizes a choke.
STARTING AND IGNITION
Controls With 300-1227 Start Disconnect Adapter
Switch AlS2, when moved to START, (Figure 3-3),
closes a circuit through diode AlCR1 and switch A l S l
to terminal 6. This energizes ignition coil T1 and either
electric fuel pump E l orfuel solenoid K2,for gasolineor
gaseous fuel, respectively.
For generator sets with a three-wire start adapter A2,
moving the switch to START energizes relayA2K2, closing itscontacts.This places B+ on terminal 16, connecting through transistor A1Q2 to start solenoid K1.
When switch A1S2 closes, it places B+ on terminal 16 of
start disconnect adapter A3. Transistor A3Q1 is energized,and connects B+ to start solenoid K1. K1 contacts
close, connecting B+ to the generator. The generator
actsasa motor and cranks the engine. If ignition voltage
and fuel are present, the engine starts and accelerates
to governed speed. On some models, the start solenoid
K1 also energizes a choke.
For generator sets with a three-wire start adapter A2,
moving the switch to START energizes relay A2K2,
which closes contactsA2K2. This connects B+ to terminal 16and start disconnect adapter A3, which energizes
start solenoid K1.
* A l F l FUSE (USED ON EARLIER MODELS)
Later models use a 9 ampere in-line fuse (Fl) lor protecting
board against reverse battery connections. This fuse Is
located in wiring harness between terminal 5 and battery.
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Generator Set Control Assembly
A1
A2
Start Adapter Control (4 to 3 wire)
Disconnect Adapter Control
A3
BT1. ..... Battery
Fuel Pump or Gas Valve (When Used)
El
E2,E3 .... Spark Plug
E4....... Electric Choke (When Used)
G1
Generator
K1 ....... Start Solenoid Relay
K2..
Fuel Solenoid (When Used)
S1 ....... Low Oil Pressure Switch (When Used)
S2 ....... High Air Temperature Switch (When Used)
S3 ....... Breaker and Cap Assembly
S4
Remote Start-Stop Switch (Customer Remote)
S5
Vacuum Switch (When Used)
T1
Ignition Coil
AlSl
Hand Crank Electric Start Switch
AlS2.
Start-Stop Switch
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I
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1
LSTART
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i
r
AICRIO
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1
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FIGURE 3-3. TYPICAL SCHEMATIC FOR CCK (SPEC R) AND NH
(SPEC D THROUGH F)
3- 4,
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