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Page 6
SYS
TEM
PR
ESS
URE
OFF
EXC
HAN
GE C
OO
LAN
T
Clear Hose
Green Hose
Black Hose
EM
PTY
W
AST
E TA
NK
OFF
EMP
TY W
AST
E TA
NK
LOW
ER R
ADIA
TO
R
& O
VER
FLO
W
& O
VER
FLO
W
LOW
ER R
ADIA
TO
R
OFF
OFF
SYS
TEM
VA
CUU
M
EXC
HAN
GE C
OO
LAN
T O
R
FILL
RA
DIA
TOR
& O
VER
FLO
W
TES
T
FILL
RA
DIA
TOR
& O
VER
FLO
W
SYS
TEM
PR
ESS
URE
EXC
HAN
GE C
OO
LAN
T
Radiator
& O
VER
FLO
W
FILL
RA
DIA
TOR
& O
VER
FLO
W
LOW
ER R
ADIA
TO
R
EM
PTY
WA
STE
TAN
K
TES
T
Overflow
Radiator
Hose
Water
Pump
SYS
TEM
VA
CUU
M
EM
PTY
WA
STE
TAN
K
FILL
RA
DIA
TOR
& O
VER
FLO
W
EXC
HAN
GE C
OO
LAN
T O
R
OFF
OFF
& O
VER
FLO
W
LOW
ER R
ADIA
TOR
Heater
Core
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.
NOTE: The MCX-2F does not need to be connected to power for the following.
The MCX-2F 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-2F 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-2F 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.
Summary of Contents for MCX-2F
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