Engine Oil Pressure
NOTE: The engine will enter shutdown mode after a warning
buzzer sounds and a 30-second countdown if engine oil
pressure is less than 34.5 kPa (5 psi) on lift trucks with pow-
ertrain protection system. Lift trucks equipped with a Yanmar
diesel engine will enter shutdown mode when the engine oil
pressure is less than 49 kPa (7 psi) on lift trucks with power-
train protection system. See the Engine Shutdown proce-
dures in the Operating Procedures section in this manual.
Cooling System
WARNING
DO NOT remove the radiator cap from the radiator when
the engine is hot. When the radiator cap is removed, the
pressure is released from the system. If the system is
hot, the steam and boiling coolant can cause burns.
NOTE: The engine will enter shutdown mode after a warning
buzzer sounds and a 30-second countdown if coolant tem-
perature reaches 121 °C (250 °F) or above, on lift trucks with
powertrain protection system. Lift trucks equipped with a
Yanmar diesel engine will enter the shutdown mode when
the coolant temperature reaches 110 °C (230 °F) or above
on lift trucks with powertrain protection system. See the
Engine Shutdown procedures in the Operating Proce-
dures section in this manual.
There is an indicator light on the Display Switch Cluster for
the coolant temperature. The red light is ON when the key
switch is in the START position or the Power ON/OFF button
is pressed, and must go OFF when the engine is running. If
the light is ON when the engine is running, the coolant and
engine are too hot. Stop the engine and check the coolant
level in the coolant recovery reservoir and radiator.
Make sure the coolant level is between the ADD and FULL
marks on the auxiliary coolant reservoir (See Figure 36). The
coolant will expand as it is heated and the level in the auxiliary
coolant reservoir will increase.
CAUTION
Additives may damage the cooling system. Before using
additives, contact your local Yale dealer.
If coolant is added, use the correct mixture of water and eth-
ylene glycol shown in the Maintenance Schedule.
Maintenance
161
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