Meters
B-Type and C-Type panels use analog electric gauges with needle indicators.
Instrument Function
Tachometer Shows engine rotation speed.
Hourmeter Shows number of operating hours. Can be used as a guide for
periodic maintenance checks. The hourmeter is located at the
bottom of the tachometer.
Coolant Temperature Gauge (C-Type only) Shows the coolant temperature.
Engine Oil Pressure Gauge (C-Type only) Shows the engine oil pressure.
Panel Lights When turning the key switch to ON, the gauges will illuminate for
easier viewing.
Key Switch
0003622
(1)
(2)
(3)
(4)
Figure 15
The GLOW position (Figure 15, (1)) is the
start aid position. Electric current to the glow
plug or air heater (if equipped) is turned on.
The air heaters is standard on the 4JH4AE
and optional on the 3JH4E, 4JH4–TE and
4JH4–HTE models. When the key is
released, the switch will automatically move
to the ON position.
The START position (Figure 15, (4)) allows
current to the starting motor. When starting
the engine, move the key to the START
position and release. The key will
automatically move to the ON position.
When the key is in the OFF position
(Figure 15, (2)) the electric current is off.
The key can be inserted or removed in this
position.
The ON position (Figure 15, (3)) allows
electrical current to the controls and
equipment and allows the engine to keep
running. To stop the engine, keep the key
switch in the ON position and push the stop
button. After stopping the engine, turn key to
OFF position.
Indicators and Alarms (Optional)
When a sensor detects a problem during
operation, the indicator on the instrument
panel will light and an alarm will sound.
Indicators are located on the instrument
panel, the alarm is located on the back of the
panel. Under normal operating conditions,
the indicators are off.
PRODUCT OVERVIEW
JH4 Series Operation Manual 23
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