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Operation of the electric circuit in detail
Start switch S1 position 1:
Line 2 on 12V contact K3 closed (30-87a), lamp H2
is on. K4 excites contact K4 (30-87). Thermocontact
element S5 normally closed, K1 excites contact K1
(30-87).
Use of lamp test:
Start switch S1 position 1 press lamp test S4, across
K3 and line 9 lamp H1 and relay K2 are excited. After
releasing lamp test button S4, lamp H1 remains on, S4
taken over by contact K2.
Start switch S1 position 2:
Line 3 on 12V (overwrite function) hourmeter P1 and
fuel solenoid Y1 excited. Thermocontact engine S2
normally closed, oil pressure contact S3 open.
Start switch S1 position 3:
Start relay K0 is excited and starter motor is running,
engine builds up oil pressure and oil pressure contact
S3 closes. K3 excited and contact K3 changes over to
(30-87). Relay K2 no longer excited, contact K2
opens, lamp H1 goes out. Alternator also commences
supplying voltage and K4 is no longer excited and
contact K4 changes over to (30-87a). Lamp H2 goes
out, one can release start switch S1 and it returns to
position 1. Exciting the safety devices occurs no
longer across line 3 but across line 2 to line 4 and this
way to line 3.
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