26
ACQUAINTANCE WITH TRACTOR
C137 C138 C139
CONTROL PANEL OF HEATING, ∗AIR-
CONDITIONING, ∗RADIO
A - control of heating valve
B - control of blower
C - switch of air-conditioning
D - control of air circulation in cab
E - space for additional radio installation
CONTROL OF HEATING VALVE (A)
a - heating valve closed
b - heating valve open
CONTROL OF BLOWER (B)
0 - blower switched-off
1 - blower low speed
2 - blower middle speed
3 - blower maximum speed
∗AIR-CONDITIONING SWITCH (C)
Switch-in and switch-off of the air-
conditioning system is made by switch
with symbol of flake (C).
By depression of the switch, the air-
conditioning system is put into operation
(symbol of flake lights).
By repeated depression of the switch,
the air-conditioning system is put out of
operation (symbol of flake does not
light).
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