Installation Guide
CONFIDENTIAL
TG-0057_19 TM4 SUMO HD CO300-A1_A2_A2.5 Installation Guide
© Dana TM4 inc., 2013-2020
Page 17 of 42
2020-11-20
4.4 Installing the cooling system
As power is delivered to the wheels, temperatures of the various components within the motor and the
MCU rise. Therefore, a cooling unit/radiator must be installed in the vehicle and connected to the MCU and
the motor to dissipate the excess heat.
A parallel cooling system is recommended for the TM4 SUMO™ HD system, but information is also given
on a possible serial cooling configuration, see Section 4.4.3.
Note
: TM4 does
not
supply any cooling equipment or accessories.
4.4.1 Safety warnings related to handling the cooling agent
Read all safety warnings associated with handling the cooling agent before working with the cooling
system.
WARNINGS
Regardless of the cooling system used, the MCU can be irreparably damaged and may become
unstable if the coolant liquid pressure reaches or exceeds a pressure of 30 PSI (static pressure
measured at the entrance of the MCU, upstream of the MCU in the circuit).
Ensure that the pump is adjusted accordingly.
The cooling agent contains ethylene glycol that is a highly flammable product. Ethylene glycol can
burn with an invisible flame that can cause serious burns and/or other injuries.
Always handle the cooling agent carefully wearing appropriate safety clothing and eye-glasses.
The cooling agent can irritate the skin, the eyes and the mucous membranes.
•
Always work in a well-ventilated area when handling the cooling agent; breathing in high
concentrations of ethylene glycol can cause nausea.
•
In case of contact with eyes and skin, rinse with water and consult a doctor.
•
In case of ingestion, seek medical help immediately.
The cooling agent is under pressure when heated; removing the cap when the coolant is hot can
cause serious burns and/or other injuries.
Wait until the coolant reaches an ambient temperature before removing the cap.
All potential dangers of handling cooling agents cannot be listed here.
Consult manufacturer warnings and recommendations for safe handling of the cooling agent.
