MAHLE RTI MCX-2HD - Manual (Page 7)

Page 6
SYS TEM
PR ESS
URE
OFF
EXC HAN
GE C OO LAN T & O VER FLO W
FILL RA DIA TOR
Clear Hose
Green Hose
Black Hose
& O VER FLO W
LOW ER R ADIA TOR EMP TY W AST E TA NK
EM PTY WA STE TA NK
OFF
OFF
& O VER FLO W
FILL RA DIA TOR
SYS TEM PR ESS URE
SYS TEM VAC UUM
FILL RAD IATO R & OV ERF LOW
EXC HAN GE C OOL ANT OR
OFF
& O VER FLO W
TES T
EXC HAN GE C OOL ANT
LO WER RA DIA TO R
Radiator
Radiator
Hose
& O VER FLO W
LOW
ER R
ADIA TOR EM PTY WA STE TAN K
TES T
Overflow
Water
Pump
EM PTY WA STE TAN
K
OFF
Heater
Core
SYS TEM VA CUU M
FILL RA DIA TOR & O
VER FLO W
EXC
HAN GE C
OO LAN T O R
OFF
& O VER FLO W
LOW ER R
ADIA
TOR
Block
Engine
RELIEVING RADIATOR PRESSURE
WARNING: Coolant in the vehicle cooling system may be extremely hot and
under great pressure. Wear safety glasses and use protective
clothing and gloves. Use extreme caution when removing radiator
cap and hoses.
The MCX-2HD does not need to be connected to power for the following.
The MCX-2HD will relieve the pressure in a hot-car radiator by drawing a vacuum on
the overflow port on the radiator cap.
Shop air (55 to 100 PSI), connected to the rear port of the MCX-2HD causes a vacuum
to be pulled on the small diameter clear hose, also connected to the rear. This clear
hose is connected to the overflow port on the radiator cap as shown above.
The system Vacuum Gauge on the MCX-2HD control panel indicates the vacuum level
which will increase until the radiator cap opens and relieves the pressure. As the
pressure releases a small amount of coolant will be seen flowing in the clear hose.
When the pressure has been relieved, the radiator cap will again close and the vacuum
level will increase and become steady on the gauge.
The radiator cap can now be slowly and carefully removed.