Carburetors for old Dodge Trucks : DODGE TRUCKS 1937 1938Previous | Home | Next |
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Form 6513—Canadian
Replacing Form 64808
DODGE TRUCKS 1937 1938
November, 1944
Reprinted May, 1946
CARBURETER INDEX AND PRICE LIST
Year Carbureter Car List Exchange
Numbers Model Price Allowance
1937 CTHI-CTH2 MC-MD-ME Sup. by439S
1937-38 *CTJ I $22.05 $3.75
1937 ETJ I-ETJ2 MF-MH Sup. by ETR I R
1937-38 *ETL I 29.40 5.00
1938 CTH2 RC-RD-RE Sup. by 4395
1938 ETJ2 RF-RH Sup. by ETR I R
*CTJI-ETLI Carburetors used only on trucks where crankcase is ventilated through
carburetor.
DODGE TRUCKS
1937-1938
Figure shows ETRIR Carburetor
MOTOR TUNE-UP—BE ACCURATE! ALWAYS USE FEELER GAUGES!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and test
compression before adjusting carburetor.
2, IMO'
/ I~ WHEN MOTOR IS .? :.1 ho
TEMPERATURE OPERATING
T,0
VALVE CLEARANCE r
SPARK BREAKER IGNITION TIMING SET VALVES FLOAT LEVEL SET
P LUG POINTS With Motor Hot (Remove Gasket) IDLE ADJUST-
GAP MENT SCREW
.025" .020" –~-- Intake .008" 5/64" I/4 to 1
(See Chart Below) Exhaust .012" Turn Open
IGNITION TIMING
Models MC-MD-RC-RD T.D.C.
Models ME-RE .. .___...2° or .002" B.T.D.C.
Models MF-RE - - - 4° or .007" B.T.D.C.
Models MH-RH--- _. 6° or .016" B.T.D.C.
CARBURETER ADJUSTMENTS
If carburetor loads up after considerable service, check float level. Wear on
lip of float lever will raise float level. Before adjusting float, be sure float
lever pin plug is firmly seated. Reset float level by bending lip of float lever
away from needle to raise level, or bending lip toward needle to lower float
level. Bend vertical lip of float only.
If motor stalls while idling, set throttle lever adjusting screw so motor runs approximately 300 rpm. Then set idle adjustment screw as instructed above. If these adjustments do not correct the trouble, remove idle orifice tube and plug assembly and clean with compressed air.
If acceleration is not satisfactory remove pump jet and clean with compressed
air. Also examine pump link setting. Pump link has three holes giving short,
medium and long strokes. If link is set to short stroke, reset to give longer
stroke to pump piston. In hot weather, high altitudes, or when high test gasoline
is used, connect pump link in inner hole, giving shorter stroke.
Maximum economy is secured only when breaker points, spark plugs, valves and
motor timing are set to manufacturer's specifications. After motor is properly
tuned, the following should also be done to insure satisfactory performance
and economy:
(a) Float level must be set as above.
(b) Ball check in step-up valve assembly must seat and move freely. When reassembling,
valve housing must be screwed in tight against seat.
(c) Step-up push rod must move freely in upper and lower guides.
(d) Step-up piston in upper casting should not bind and must be free of dirt.
(e) Main metering screw can be replaced with leaner than standard metering
screws, for altitude or high test fuel.
Caution: Do not attempt to gauge metering jets with drills. These jets have
been flow-tested, to insure correct fuel flow.
Copyright 1944