Chevrolet with Old Carter Carburetors : CHEVROLET PASSENGER & TRUCK G. M. C. TRUCK 1941 - 1948Previous | Home | Next |
 |
CARBURETER ADJUSTMENTS
If carbureter loads up after considerable service, float level should be checked.
Wear on lip of float lever will raise float level. Float level may be reset
by bending lip of float lever down to raise float level or bending lever
up to lower float level. Only a very slight bend is needed.
If motor stalls while idling, reset idle adjustment screw and throttle lever
adjusting screw. If these adjustments do not correct the trouble, remove low
speed jet tube and clean thoroughly with compressed air. Examine and see that
tube seats gasoline-tight in body casting, top and bottom. If not, replace
with a new tube of identical specifications. NEVER
CHANGE A LOW SPEED JET TUBE FROM ONE CARBURETER TO ANOTHER.
Increased resistance on foot throttle indicates a clogged pump jet. Pump jet
should be removed and cleaned with compressed air, which, in many cases, will
remove the dirt nr lint. However, it is usually advisable to replace the pump
jet, as its cost is npminal. All jets and ball checks must be seated gasoline-tight.
Poor acceleration may be due to damaged or worn plunger leather in accelerating
pump, corrosion in pump cylinder, loose or cracked cylinder, cracked plunger
cup or bent pump arm (parts which may be replaced at small cost). If plunger
is removed from cylinder, always use loading tool in reassembling to avoid
damage to plunger leather.
Chevrolet Six—I 941-I948—Carbureter No. 574S—List Price $21.85
WHEN SERVICING, USE GASKET ASSORTMENT No. 638A—PRICE $0.50; REPAIR PARTS
PKG. No. 1089C, $5.98 PART NAMES IN BOLD TYPE, LISTED BELOW, INDICATE CONTENTS
OF REPAIR PACKAGE
List Price
Tube clamp assembly- 35
Spring retainer 07
Retainer ring 07 Plunger and rod assembly (Identify by
Shaft No. 49-129) 1.00
75-485 Metering rod—standard—.067"-.067" to
.062"-.062" to .060"-.046" 43
75-517 Metering rod—I size lean—.068"-.068" to
.065"-.065" to .064"-.049" .43
101-10 Wire clamp screw 07
101-28 Throttle shaft arm clamp screw 07
101-121 Throttle lever adjusting screw 07
I01-143S Attaching screw and washer assembly 07
101-1445 Attaching screw and washer assembly (7) 07
105-II Tube clamp screw -- (2) 07
I05A-8 Tube clamp nut (2) 07
105A-I3 Flange nut (2) 07
I14-15S Throttle shaft arm and screw assembly 28
I 15-72 Throttle connector rod 35
117-92 *Connector link 15
118-43 Dust cover .72
120-1155 Metering rod jet assembly—.093" Dr 43
121-67 Bowl cover gasket 15
122-45S Intake disk check assembly 35
122-47S Discharge disk check assembly 35
I22-73S Discharge disk check assy. (Sup. by 122-47S) -..
129-I8 Metering rod disk -03
136-19 tPlug washer (conical) 136-50 (flat) 01
136-20 tPlug washer (conical) 136-49 (flat) (2) 01
136-27 tPlug washer (conical) 136-48 (flat) (2) 01
146-115S Bowl cover and countershaft assembly 1 77
150A-10 Pin spring (3) 01
150A-I5 Pin spring -01
156-19 Gas line fitting (brass) optional 28
156-47 Gas line fitting (steel) 28
163-14 Felt packing 07
'Gaskets so marked must be soaked in 90 proof denatured alcohol for 15 minutes,
installed on part, and let dry before using. *53A-2255 and 117-92 available
for service (not used in production).
tNote: The use of flat or conical plug washers should be determined by shape
of seat in casting.
NOTE: Small figures in parentheses preceding list price indicate number of
pieces used in one carbureter. Where no figure is shown, only one is used.
Choke valve 28
Low speed jet assembly 43
Rivet plug --° (7) 03
Disk check passage plug 15
Rivet plug (7) 03
Nozzle plug 15
Pump jet passage plug I5
Nozzle and idle passage plug (2) .15
Nozzle assembly 63
Choke assembly 50
Choke shaft and lever assembly 57
*Needle seat gasket 07
*Metering rod jet gasket 07
Pump cylinder gasket—upper 07
Nozzle gasket 07
Air horn gasket 07
Float and lever assembly 1 13
Float lever pin 07
Needle and seat assembly 1 13
Strainer gauze 15
Idle adjustment screw 43
Choke valve attaching screw (2) 2for 07
Throttle valve attaching screw (2) 2 for 07
Pump jet, 72 drill 22
*Pump lever assembly 43
Pump lever assembly (late production) 43
IA-17 Flange gasket $0 07
2.104 Throttle valve 15
3-470S Throttle shaft and lever assembly 1 00
6-374S Air horn assembly 3 90 7-107
Pump spring
Adjusting screw lock spring 15
Connector rod spring 07
Plunger spring 15
Choke valve spring 15
Metering rod spring ........................... .15
Pump connector link spring -15
Part No. PART NAME List Price Part No. PART NAME 62-10IS 63-35 63-44 64-72S