Hitachi ZW180, Technical Manual

Page: 160 / 374

SYSTEM / Electrical System
T2-4-10
FNR Lever at Operated Position
•
Starting Circuit (Neutral Relay)
•
When the key switch is turned to the START
position, terminal B is connected to terminals M
and ST inside the key switch.
•
Current from terminal ST of the key switch flows
to the neutral relay. Current from terminal M of the
key switch flows to fuse #8 of fuse box A and
excites the battery relay.
•
By exciting the battery relay, the battery power
flows to terminals B of the starter motor and the
starter relay.
•
At this time, when either of the FNR lever or the
FNR switch is in the forward or reverse position,
terminal A-27 of MC is connected to the ground
and the neutral relay is excited.
•
By exciting the neutral relay, the circuit between
the neutral relay and terminal S of the starter relay
is blocked.
•
Therefore, when either of the FNR lever and the
FNR switch is at forward or reverse, the starter
motor is not operated although the key switch is
turned to the START position.