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ENGINE DIVISION SERVICE MANUAL
TM 5-4210-230-14&P-1
Fig. 56 Exhaust Gas Recirculation System
(Dual Diaphragm EGR Valve)
A low temperature vacuum control valve is used in the
exhaust gas recirculation system. The purpose of this valve is
to prevent exhaust gas recirculation when the engine is cold.
The low temperature control valve senses engine coolant
temperature and is located in the coolant passage of the
intake manifold. Whenever engine coolant temperature is
below 46 deg. C (115 deg. F), the low temperature control
valve is closed, blocking vacuum from the EGR valve
diaphragm, thus preventing EGR valve operation. When
engine warm ups and coolant temperature exceeds 46 deg. C
(115 deg. F), the low temperature control valve opens,
permitting vacuum to actuate the EGR valve and establish
exhaust gas recirculation in response to throttle plate position.
The low temperature control valve can be identified by a
purple exterior color.
EGR VALVE APPLICATION CHART
For 1980 U.S.A. Model Engines
(Except California)
Engine
Carburetor
IH No.
Mfr. No.
Color Code
V-345
2210C
480825C1
17057905
Red/White
V-345
2300EG
472207C1
17051786
Black/White
V-392
4150EG
480824C1
7044409
Green/Black
MV-404
2210C
446981C1
17056690
Green/Yellow
MV-404
2300EG
446981C1
17056690
Green/Yellow
MV-404
4150EG
440312C1
17053177
White
MV-446
4150EG
440312C1
17053177
White
V-537
2300EG
440310C1
17053031
Blue/White
CANADA
V-304
2210C
440308C1
7040435
None
V-345
2210C
440308C1
7040435
None
V-345
2300EG
440306C1
7030983
Black
CGES-215 Page 31
PRINTED IN UNITED STATES OF AMERICA
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