DANA SPICER TM4 SUMO HP HV Powertrain, Troubleshooting Manual

Page: 18 / 192

18
General Information
Coolant Specification
Safety precaution
Regardless of the cooling system used, the product
can be damaged if the coolant temperature is allowed
to exceed the maximum temperature specified in your
system specifications document. The MCU will apply
a derating mode as a protection to reduce the
sys
tem’s heat generation.
Also, the static pressure of the coolant system should
never be allowed to exceed 30 PSI. Doing so, may
overcome internal sealing breach and cause
damages to the unit:
•
Ensure that the cooling system components
are adjusted correctly to respect these limits.
Recommendations
To prevent corrosion in cooling systems, these
recommended best practices must be followed.
•
The cooling circuit must be rinsed with de-
ionized water each time before filling.
•
The ethylene glycol must respect the
standard corresponding to its application
(ASTM D3306 Type III or ASTM D6210 Type
III).
•
The ethylene glycol must contain some type
of active corrosion inhibitors.
•
The ethylene glycol must be diluted with de-
ionized water (not distilled water).
•
The dilution ratio must be 60% ethylene glycol
to 40% de-ionized water (minimally 50%
ethylene glycol to 50% de-ionized water).
•
Two different types of coolant should not be
mixed.
As the cooling unit, cooling hose and cooling agent
are not supplied by Dana TM4, the vehicle integrator
has full responsibility for following specifications and
operating methods given by the system specifications
and the provided products interface drawings (MCU
and motor).
In order to meet Dana TM4 specifications and to
obtain
maximum system performance, the
temperature of the coolant and coolant flow must
comply with the requirements as specified in the
system specifications of your system. Above these
thresholds, the system can degrade the output torque
to protect its internal components from overheating.
When using the MCU in a vehicle cooling
configuration, there can be associated drops in
pressure that have to be managed. Coolant pressure
drops can be affected by the temperature of each
component; refer to your system’s specifications for
more information.
WARNING