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MODEL M4MC/M4ME/4MV CARBURETOR
GENERAL DESCRIPTION
T h e Model M 4 M C /M 4 M E /4 M V c arburetor (Figs.
6C-30, 3 1 and 32) are two stage c arburetor o f dow n d raft
Fig. 6 C - 3 0 - M o d e l M 4 M C C a r b u r e t o r
design. The triple venture system is used on the prim ary
side fo the carburetor with 1-3/8 inch throttle valve
bores.
The secondary side has two 2 -1 /4 inch bores. Using
the air valve principle in the secondary side, fuel is
metered in direct propo rtio n to the air passing through
the secondary bores. A baffle is attached to the secondary
side o f the air horn above the m ain well bleed tubes to
deflect incoming air to improve secondary nozzle
o peration on heavy acceleration.
The solenoid is used on air conditioned equipped
vehicles with autom atic transmission and light duty
emissions to increase idle speed slightly w hen the air
conditioning is in operation. This allows the engine to
idle at the same speed when the air conditioning is in
operation, as when it is off.
The float assembly is used along with a windowless
type needle seat for better fuel handling in the float
bowl. Also, a plastic filler block is used above the float
c h a m b e r to reduce fuel slosh in this area. A fuel inlet
filter check valve is used on light duty emission models to
shut off fuel flow to the c arburetor float bowl to prevent
fuel leaks if a vehicle roll over should occur.
The m ain m etering system on all models uses
separate m ain wells to feed each fuel nozzle for
improved fuel flow in the venturi system.
Adjustable Part T h ro ttle -M 4M C /M 4M E
In o rder to provide a close tolerance adjustm ent in
the main metering system, an adjustm ent is pro vided to
very accurately set the dep th o f the metering rods in the
main metering jets.
T he adjustm ent feature consists o f a pin pressed in
the side o f the power piston which extends through a slot
in the side o f the piston well. W hen the power piston is
C H O K E V A L V E
A C C E L E R A T O R P U M P ROD
PART N U M B E R
THRO TTLE LEVER
A IR V A LV E
F U EL IN LET
C U R B IDLE S C R E W
IDLE M IX T U R E
PR IM A R Y TH ROTTLE
LEVER
Содержание 1977 light duty truck
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Страница 70: ...Fig IB 24 Four Season System Vacuum Diagram C K Models 1B 24 LIGHT TRUCK SERVICE M A N U A L...
Страница 71: ...Fig lB 25 Overhead System Wiring Diagram C K Models AIR C O N D ITIO N IN G 1 B 2 5...
Страница 72: ...Fig IB 26 C60 System Wiring Diagram G Models...
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Страница 75: ...Fig lB 29 Motor Home Chassis Wiring Diagram THERMOSTATIC SWITCH AIR C O N D ITIO N IN G IB 2 9...
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Страница 129: ...Fig 2D 5 Typical 05 and 0 6 Vans...
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Страница 148: ...Fig 2D 51 Rear Door Controls...
Страница 158: ...Fig 2D 79 Folding Top Assembly...
Страница 159: ...Fig 2D 80 Folding Top Side Moldings and Header...
Страница 161: ...Fig 2D 85 Dnver s Bucket Seat 14 Fig 2D 86 Passenger s Bucket Seat 14...
Страница 162: ...Fig 2D 89 Rear Folding Seat 06 Fig 2D 9 0 Rear Bench Seat 14...
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Страница 248: ...Fig 3B 77 Removing Bearing Housing Pivot Pins Fig 3B 79 Replacing Lock Bolt Spring...
Страница 278: ...C 10 G 10 20 C 20 30 G 30 P 10 30 9 Fig 3C l Front Suspension C P Series...
Страница 284: ...BALL JOINT DIAGNOSTIC PROCEDURE...
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Страница 321: ...Fig 3D 12 Rear Spring Installation G Models...
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Страница 395: ...Fig 5 2 Front Brake Pipes and Hoses C K Models...
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Страница 397: ...Fig 5 4 Front Brake Pipes and Hoses P Models BRAKES 5 1 3...
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Страница 403: ...fryIvtcwfA POOO 4 2 MODELS lVIEW C K MODELS P 3 0 0 3 2 MODELS G MODELS Fig 5 9 Parking Brake Assembly Typical...
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Страница 448: ...Fig 6A 4 P Series Engine Rear Mount...
Страница 451: ...Fig 6A 8 K Series Engine Rear Mount...
Страница 452: ...ENGINE M O U N T BRACKET ALL K SERIES W ITH L 6 ENGINE 6A14 LIGHT TRUCK SERVICE M A N U A L...
Страница 483: ...FUEL PUMP PUSH ROD OILING OIL F LTER AND BY PASS VALVE...
Страница 484: ...FUEL PUMP PUSH ROD OILING CRANKCASE AND CRANKSHAFT OILING VALVE MECHANISM OILING...
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Страница 488: ...MOUNT VIEW A V AUTOMATIC TRANSMISSION FRONT MANUAL TRANSMISSION...
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Страница 599: ...CARBON c 5 PILE L VOLTMETER f m s K K K V v D BATTERY RESISTOR TEST AMMETER s S S 5 S V GENERATOR D C...
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Страница 612: ...Fig 6D 3i High Energy Ignition Basic W iring...
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Страница 647: ...Fig 6E 1 Vacuum Hose Schematic L6 250 CID LD Emissions DISTRIBUTOR PCV VALVE MANIFOLD VAC FITTING...
Страница 648: ...DISTRIBUTOR VALVE Fig 6E 3 Vacuum Hose Schematic L6 292 CID Calif HD Emissions...
Страница 649: ...V A LV E Fig 6E 5 Vacuum Hose Schematic V8 305 CID HD Emissions...
Страница 650: ...Fig 6E 7 Vacuum Hose Schematic V8 350 CID High Altitude Calif LD Emissions...
Страница 651: ...VALVE Fig 6E 9 Vacuum Hose Schematic V8 350 400 CID Except Calif HD Emissions...
Страница 652: ...CANISTER...
Страница 653: ...PCV V AL VE Fig 6E 13 Vacuum Hose Schematic V8 454 CID Except Calif HD Emissions...
Страница 672: ...Fig 6E 29 Air Cleaner 305 350 400 V8 CK...
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Страница 691: ...SPECIAL TOOLS n 1 J 25077 1 Vibrator Include Catalyst Container and Fill Tube Extension 2 J 25077 2 Aspirator...
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Страница 700: ...Fig 7A 6B Detent Downshift Cable C K and P Series...
Страница 709: ...Fig 7 A 12B CBC 350 Hydraulic Circuit A U TO M A T IC T R A N S M IS S IO N 7 A 1 7...
Страница 743: ...VIEW B FLAT IvEwfDl l6 G tO 2 GAGE...
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Страница 755: ...V I E W B WITH AUTOMATIC TRANSMISSION WITH MANUAL TRANSMISSION V I E W A...
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Страница 767: ...V I E W D 1 6 ENGINE VIEW V 8 ENGINE...
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Страница 790: ...STOPLAMP SWITCH See Section 5 Brakes of this manual for adjustment and replacement procedures G MODELS...
Страница 794: ...G A S G A U G E...
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Страница 836: ...Fig 8 58 Seat Belt Reminder System Schematic...
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Страница 853: ...SPECIAL TOOLS J 2 3 5 2 0...