Bomag BW 156 D-3 Service Manual page 156

Service Training
Reverse travel
When moving the travel lever to reverse while driving on level ground, the coil of relay (K26:05) is not
supplied with current.
Current flows
• from potential K11,
• via fuse (F26:23),
• through the closed contact (K26:07)
• to the back-up alarm buzzer (H14:11).
The back-up alarm will sound.
Forward tavel
In this position the proximity switch (B14:05) closes.
Current flows
• from potential K11,
• via fuse (F25:05),
• the closed proximity switch (B14:05),
• to the coil of relay (K26:05).
The relay switches over, the current supply for the warning buzzer (H14:11) is interrupted.
Current flows also
• from potential K11,
• via fuse (F26:23),
• to the travel speed range selector (S42:24).
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BW 178/179 D-3/PD-3