Edelbrock 1901 Automobile Parts User Manual

REPLACEMENT Q-JET CARBURETOR
KIT INSTRUCTIONS
KITS #1920, 1921 & 1990
®
Performer Models 1901, 1902, 1903,
1904,1905,1906,1910
Please read these instructions carefully before attempting to rebuild your carburetor. Make sure to refer to your carburetor Installation
Instructions for further information if need be. If you have any questions or problems, do not hesitate to contact our Technical Hotline at: (800) 4168628 from 7:00 am to 5:00 pm, Monday through Friday, Pacific Standard Time or e-mail us at: edelbrock@edelbrock.com.
To check kit contents see exploded view of carburetor and parts description on last page. Verify that all parts underlined on
list are in your kit.
Carb Kit contains all necessary parts and instructions to rebuild your Edelbrock Carburetor properly. When similar parts are contained in the Carb Kit,
choose the ones that most closely match the existing parts. Some parts in the kit may not be needed.
1. DISASSEMBLE carburetor use accompanying exploded view as a
choke housing. Lip faces float bowl. Disregard for remote choke
guide..
models.
➾Remove pump lever by driving roll pin through far enough to permit
➾Do not install float needle pull clip into holes in float arm.
release of lever.
➾Install power piston. Press plastic retainer into bore until flush with
➾Remove air horn screws.
top of float bowl casting.
➾Remove power piston by pressing down and releasing with a snap.
➾Carefully remove pump cup (with garter spring, if used) from pump
➾Remove power piston spring(s).
head. Install new cup (with new garter spring, if used) on pump
➾Do Not turn nor remove factory-adjusted stop screw next to power
head.
piston. (APT) Adjustable part throttle.
➾Do Not turn nor remove factory-adjusted screw in aneroid cover.
➾Turn idle mixture needles clockwise and record number of turns
needed to lightly bottom them, for use during reassembly. Remove
needles.
➾Disassemble choke cap from housing per Figure 13 (not applicable
➾If used, install new pump stem seal and retainer in air horn. Lip
to remote choke models).
faces toward outside of carburetor. Lightly stake casting around
retainer.
2. CLEAN carburetor.
➾Select correct air horn gasket by matching replacement to old
➾Soak the carb parts (except as noted below) in a cold immersion
gasket.
type carb cleaner.
➾Tighten air horn screws in numerical sequence per illustration.
➾Use mineral spirits or kerosene to clean solenoids, choke cover,
Torque screws 32-60 in-lbs.
aneroid, float, float bowl inserts, vacuum breaks, seals or other
➾Install the choke cover and
parts containing rubber. Do not immerse these parts in carb
coil assembly per Figure15.
cleaner.
Use the cover gasket on hot
➾Blowout all passages with compressed air .
air model only (1903). Do
➾After a thorough cleaning of all castings and parts, pay particular
not use the cover gasket on
attention to the cleanliness of the power piston and the body
electric choke model
casting bore where it is housed. Any sticking of the power valve
1904,05,06,10.
will prevent proper fuel control and affect driveability.
3. REASSEMBLE carburetor and ADJUST following sequence illustrated. 4. REINSTALL carburetor to intake
manifold, torque mounting bolts
➾Refer to model number for specifications. Use figure 1 to find
to 110 in-Ibs.
position of model number
➾Install new intermediate choke shaft seal in float bowl. Lip faces
5. ADJUST idle mixture and speed
outward. On Hot Air Choke models, install additional shaft seal in
according to vehicle manufacturer's specifications.
ADJUSTMENT SPECIFICATIONS
FIG. 1
FLOAT
CARB # SETTINGS
1901
15/32”
(8904S)
1902
15/32”
(8905S)
1903
25/64”
(8906S)
1904
25/64”
1905
1906
(8907S)
1910
(8908S) 19/64”
©2002 Edelbrock Corporation
Brochure No. 63-0149
FIG. 2
PUMP SETTINGS
LEVER
DIM.
HOLE
FIG. 4
AIR
VALVE
SPRING
FIG. 5
CHOKE
COIL
LEVER
FIG. 6
FIG. 7
FAST
IDLER
VACUUM
BREAK
INNER
13/32”
7/8 TURN
1/8”
48°
22°
INNER
13/32”
7/8 TURN
1/8”
48°
22°
INNER
13/32”
7/8 TURN
1/8”
48°
27°
INNER
13/32”
7/8 TURN
1/8”
48°
27°
INNER
5/8”
1 TURN
1/8”
48°
27°
Page 1 of 4
FIG. 9
FIG. 13
UNCHOKE
LOADER SETTINGS
PER
40°
NOTCH
PER
40°
NOTCH
PER
40°
NOTCH
PER
40°
NOTCH
40°
PER
NOTCH
Rev. 10/02
ALUMINUM TAG
WITH EDELBROCK’S
MODEL NUMBER.
HOLD FLOAT HINGE
PRESS DOWN GENTLY
ON FLOAT TANG UNTIL
SEATED ON NEEDLE. 2
1 PIN FIRMLY IN PLACE.
3
4
TO ADJUST, BEND
FLOAT UP OR DOWN.
BOWL COVER GASKET REMOVED
MEASURE FROM TOP OF CASTING
TO TOP OF FLOAT 3/16” IN
FROM TOE OF FLOAT.
CAUTION : DO NOT EXERT
PRESSURE ON RESILIENT
NEEDLE VALVE.
MANUFACTURER’S NUMBER.
Fig. 1
CARBERUTOR IDENTIFICATION
VENT VALVE COVER AND SPRING
REMOVED, CHOKE OPEN POSITION,
FAST IDLE CAM FREE.
1 INSTALL PUMP ROD
IN PROPER HOLE.
Fig. 2
DRY FLOAT LEVEL ADJUSTMENT
1
TO ADJUST, REMOVE PLUG AND
TURN HEX SCREW. REPLACE PLUG
AFTER ADJUSTMENT.
5
INNER.
MEASURE FROM TOP OF
CHOKE VALVE WALL TO
TOP OF PUMP STEM. 3
GAUGE IN PLACE,
VENT VALVE SHOULD
BE CLOSED, GAUGE
REMOVED, VENT 4
VALVE SHOULD BE
OPEN.
OUTER.
TO ADJUST SUPPORT 4
PUMP LEVER ON PUMP
END AND BEND LEVER ON
PUMP ROD SIDE.
PLACE .075” GAUGE
BETWEEN IDLE STOP
SCREW AND THROTTLE
LEVER TANG.
3
BACK OUT THROTTLE STOP SCREW.
THROTTLE VALVES COMPLETELY
CLOSED. TURN THROTTLE STOP SCREW
IN UNTIL IT CONTACTS TANG ON
2
THROTTLE LEVER. THEN TURN SCREW
IN 1 1/2 TURNS.
BACK OUT THROTTLE STOP
SCREW THROTTLE VALVES
HELD CLOSED.
2
ACCEL. PUMP ROD ADJUSTMENT
Fig. 3
BOWL VENT VALVE ADJUSTMENT
Fig. 4
TO ADJUST LOOSEN ALLEN LOCK SCREW. AIR VALVE HELD CLOSED. TURN ADJUSTING SCREW
CLOCKWISE UNTIL TORSION SPRING CONTACTS PIN ON AIR VALVE SHAFT. THEN TURN
ADDITIONAL SPECIFIED TURNS AND TIGHTEN ALLEN LOCK SCREW.
(ADJUSTMENT SPECIFICATIONS TABLE)
TO ADJUST
BEND ROD.
SPRING ADJUSTING
SCREW.
3
1
PUSH UP ON CHOKE COIL LEVER
UNTIL CHOKE VALVE IS CLOSED.
AIR VALVE SHAFT.
INSERT .120” GAUGE IN HOLE. 2
LOWER EDGE OF LEVER SHOULD
JUST TOUCH GAUGE.
ALLEN LOCK SCREW.
AIR VALVE SPRING ADJUSTMENT
CAUTION: PLACE CARBURETOR ON
HOLDING FIXTURE SO THAT IT WILL
REMAIN IN SAME POSITION WHEN GAUGE
IS USED.
1. ROTATE DEGREE SCALE UNTIL ( 0 ) IS
OPPOSITE POINTER
2. CHOKE VALVE HELD COMPLETELY
CLOSED. PLACE MAGNET SQUARELY
ON TOP OF CHOKE VALVE.
3. ROTATE BUBBLE UNTIL IT IS
CENTERED.
4. ROTATE SCALE SO THAT DEGREE
SPECIFIED FOR ADJUSTMENT IS
OPPOSITE POINTER.
5. FOLLOW NUMERICAL OUTLINE IN
MAKING ADJUSTMENT, INSTEAD OF
MEASURING GAP AT EDGE OF CHOKE
VALVE. MAKE ADJUSTMENT TO BRING
BUBBLE BACK TO CENTER POSITION.
Fig. 5
Fig. 6
TO ADJUST,
BEND TANG ON
FAST IDLE CAM
3
4
1
3
2
4
1
PLACE CAM FOLLOWER
ON SECOND STEP OF
FAST IDLE CAM NEXT
TO HIGH STEP.
GAUGE: J-26701 KENT MOORE TOOL
BT-7704 BORROUGHS TOOL
ANGLE GAUGE METHOD
©2002 Edelbrock Corporation
Brochure No. 63-0149
CHOKE COIL LEVER ADJUSTMENT
Fig. 7
Page 2 of 4
PUSH UPWARD ON
CHOKE COIL LEVER,
MOVING CHOKE TOWARD
CLOSED POSITION UNTIL
STOP IS MADE.
( BUBBLE ON ANGLE
GAUGE SHOULD BE
CENTERED.)
2 FOLLOW GAUGE SET
PROCEDURE FIG.7
FAST IDLE CAM (CHOKE ROD) ADJUSTMENT
Fig. 8
Rev. 10/02
MEASURE DISTANCE
BETWEEN UPPER EDGE
OF CHOKE VALVE AND
AIR HORN WALL.
TAPE PURGE BLEED HOLE IN
COVER. (WHEN USED). APPLY
OUTSIDE VACUUM SOURCE
TO FULLY SEAT DIAPHRAGM.
4
AIR VALVE COMPLETELY
CLOSED. MEASURE DISTANCE
BETWEEN ROD AND END OF 2
SLOT IN LEVER
2
TAPE PURGE BLEED HOLE IN
COVER (WHEN USED). APPLY
OUTSIDE VACUUM SOURCE TO
FULLY SEAT DIAPHRAGM 1
TO ADJUST TURN 5
SCREW
BUBBLE ON ANGLE GAUGE
SHOULD BE CENTERED.
SEE FIG. 7
3
3 PUSH UP ON INSIDE CHOKE COIL
LEVER UNTIL TANG ON
INTERMEDIATE CHOKE SHAFT
CONTRACTS TANG ON VACUUM
BREAK PLUNGER STEM
PLACE CAM FOLLOWER ON
HIGH STEP OF FAST IDLE 1
CAM.
TO ADJUST
BEND ROD
Fig. 9
FRONT VACUUM BREAK ADJUSTMENT
STEP A
CHOKE VALVE AND THROTTLE VALVES
CLOSED.
1
2 MEASURE BETWEEN UPPER EDGE OF
CHOKE VALVE AND AIR HORN WALL.
Fig. 10
AIR VALVE ROD ADJUSTMENT
STEP B
CHOKE VALVE HELD WIDE OPEN BY
PUSHING DOWN ON TAIL OF FAST
IDLE CAM.
1
4
CLOSE CHOKE VALVE BY
PUSHING UP ON TANG ON
VACUUM BREAK LEVER.
(BUBBLE ON ANGLE GAUGE
SHOULD BE CENTERED).
TO ADJUST BEND
LOCKOUT PIN. 3
TO ADJUST
BEND TANG.
TO ADJUST FILE
END OF PIN.
3
3
(.015” CLEARANCE)
1
(.015” CLEARANCE)
2
THROTTLE VALVES HELD IN
WIDE OPEN POSITION.
2
MEASURE DISTANCE
BETWEEN LOCK-OUT PIN AND
LOCK-OUT LEVER.
Fig. 11
UNLOADER ADJUSTMENT
MEASURE DISTANCE BETWEEN
END OF LOCK-OUT PIN &
LOCK-OUT LEVER.
SECONDARY THROTTLE LOCK-OUT ADJUSTMENT
Fig. 12
1 CHOKE VALVE WIDE OPEN FAST
OPEN PRIMARY THROTTLE SLOWLY
UNTIL ACTUATING LINK CONTACTS
TANG.
IDLE CAM FREE OF CAM
FOLLOWER.
3
1
MEASURE DISTANCE BETWEEN
ROD AND SLOT IN LEVER.
TO ADJUST
BEND TANG.
4
CURB IDLE SET TO
PROPER RPM 2
5
2
TO ADJUST
BEND TANG.
(.020” CLEARANCE)
3
LINK SHOULD BE IN
CENTER OF SLOT.
LEVER AGAINST TANG.
(ON CAR)
(ON CAR)
SECONDARY OPENING ADJUSTMENT
Fig. 13
SECONDARY CLOSING ADJUSTMENT
Fig. 14
DISASSEMBLY: CAREFULLY ALIGN A #21 DRILL (.159 ”) ON PO RIVET HEADS AND
DRILL ONLY ENOUGH TO REMOVE RIVET HEAD, DRILL ALL RIVET HEADS (3) AND
USE A DRIFT PUNCH AND HAMMER TO DRIVE THE REMAINDER OR THE RIVETS OUT
OF THE CHOKE HOUSING. REMOVE CHOKE COMPONENTS.
1/8”
3/16”
ADAPTER MADE
FROM STEEL TUBING
TURN CLOCKWISE
FOR RICHER SETTING
2 0’CLOCK
POSITION
©2002 Edelbrock Corporation
Brochure No. 63-0149
3/4”
REASSEMBLY: PLACE CHOKE CAP IN PLACE AND ROTATE CLOCKWISE UNTIL COIL
TANG ENGAGES LEVER TANG AND CLOSES CHOKE VALVE. IT IS IMPORTANT THAT
THIS ENGAGEMENT IS ACHIEVED FOR PROPER OPERATION.
MODEL 1903: ROTATE AND ALIGN THE NOTCH IN THE COVER WITH THE PROTRUSION
ON THE RETAINER INSTALLED AT THE 2 O’CLOCK POSITION.
MODEL 1904: ROTATE AND ALIGN THE NOTCH IN THE COVER WITH THE RAISED
CASTING BOSS AT THE 2 O’CLOCK POSITION. RETINING THE COVER WITH THE POP
RIVETS PROVIDED IN THE KIT. IT MAY BE NECESSARY TO USE AN ADAPTER (TUBE)
IF INSTALLATION TOOL INTERFERES WITH THE ELECTRICAL CONNECTION TOWER IN
THE CHOKE COVER.
REMOVE & REPLACING TAMPER RESISTANT CHOKE COVER
Fig. 15
Page 3 of 4
Rev. 10/02
EXPLODED VIEW OF TYPICAL EDELBROCK CARBURETOR
PA RT D E S C R I P T I O N
1. SCREW (2) - THROTTLE LEVER ACTUATOR
2. THROTTLE LEVER ACTUATOR ASSY.
3. SCREW (2) REAR VAC. BREAK
4. REAR VAC BREAK ASSY.
5. LINK -REAR VAC. BREAK
6. SCREW (2) - FRONT VAC. BREAK
7. FRONT VAC. BREAK & HOSE ASSY .
8. LINK - FRONT VAC. BREAK
9. LEVER - PUMP
10. ROD - PUMP
11. SCREW - CHOKE LEVER
12. LEVER - CHOKE SHAFT
13. ROD - CHOKE
14. SCREW - SEC. METERING ROD HOLDER
15. HOLDER -SEC. METERING RODS
16. METERING ROD (2) - SECONDARY
17. SCREW & LOCKWASHER - BOWL COVER
18. SCREW {2) -BOWL COVER (TAPERED HEAD)
19. BOWL COVER ASSY.
20. RETAINER - PUMP STEM SEAL
21. SEAL - PUMP STEM (1980 UP')
22. GASKET - BOWL COVER
23. PUMP PLUNGER ASSY.
24. SPRING - PUMP RETURN
25. BAFFLE PUMP WELL
26. INSERT - ANERIOD CAVITY ( SOME MODELS )
27. POWER PISTON ASSY.
28. SPRING - METTERING ROD
29. METERING ROD (2) - PRIMARY
30. SPRING - POWER PISTON
31. lNSEAT - FLOAT BOWL
32. FLOAT & LEVER ASSY.
33. HINGE PIN - FLOAT
34. NEEDLE, SEAT & GASKET ASSY.
35. PLUG - PUMP DISC. BALL
36. BALL - PUMP DISC.
37 JET (2) - MAIN METERING
38. SCREW / RIVET (3) - RETAINER
39. RETAINER (3) -CHOKE COVER
40. CHOKE COVER ASSY.
41. GASKET -CHOKE COVER ( HOT AIR ONLY)
42. SCREW & LOCKWASHER - CHOKE HOUSING
43. CHOKE HOUSING ASSY.
44. SCREW - STAT COIL LEVER
45. LEVER - STAT COIL
46. SHAFT ASSY. - INTERMEDIATE CHOKE
47. CAM. - FAST IDLE
48. SEAL - CHOKE HOUSING
49. LEVER - INTERMEDIATE CHOKE
50. CAM - SECONDARY LOCKOUT
51. TUBE - VAC. PASSAGE
52. SEAL - INTERMEDIATE CHOKE SHAFT
53. SCREW & LOCKWASHER (3) - THROTTLE BOOY
54. FLOAT BOWL ASSY.
55. GASKET -THROTTLE BODY
56. FILTER NUT - FUEL INLET
57 . GASKET - FILTER NUT
58. FILTER - FUEL
59. SPRING - FILTER
60. PLUG (2) - IDLE NEEDLE (NOT REPLACED)
61. NEEDLE & SPRING ASSY. (2) - IDLE ADJ.
62. THROTTLE BODY ASSY.
©2002 Edelbrock Corporation
Brochure No. 63-0149
Page 4 of 4
Rev. 10/02