GMC 1976 ZEO 6083 Maintenance Manual page 364

6M- 22
ENGINE FUEL SYSTEM
Figure 28-Carburetor Adjustments
5 6
7 8 9 10
IDfMIfICATIDNOI STEPS
uN rASr
CAT: ON,
(An1
VACUUM BREAK
AIR VALVE
DASHPOT
.l75
CHOKE COIL PDIUSTMENT
UNEOADfR
300'
AIR VALVE
LOCKOUT
SECONDARY
OPENING
HIGH'
050'
.035''
.070' .
S( CDND
~ Lr[IARAN(
~-Ilnv
tlnn
ImI
O
PLACE GAUGE BETWEEN
LOWEREDGE OF CHOKE
O
!
AIR VAIVI
VALVE AND INSIDE WALL
wIU1 OPIN
(DSPECIFIEO
OF AIR HORN
SEAT DIAPHRAGM
GAUGE
ONO VACUUM
BY AI " PLYING AT
LEAST 10"VACUUM _
O!
4)
U
NO LOWER
ND OF ROD
BEID ROD
TO ADJUST
TO ADJUST
~Q
PLACECAM
FOLLOWERON
V j~Rtnwvlu,
uITHrHr,Kl (OIL COVER
PI~SHUPUN INSIOt
IGHESTSTEP
Q
`-~
OF FAST IDLE CAM
f .HOKI fllll I[VfR 1.f11 :NTfR(AUr,K
_
l :nrn TANU ON OI,islUI I IVER
--
LyISt
---~
r~ .
r oNTAfrS VAr I ;rNl HRIAK Rr10 -
------
VACUUM BREAK ADJUSTMENT
AIR VALVE DASHPOT ADJUSTMENT
T-J
y
O
GAUGE BETWEEN AIR HORN
WALL AND LOWER EDGE OF
CHOKE VALVE
ET AT INDEX
ROTATE COVER AND
/
- t
COIL ASSEMBLY
COUNTERCLOCKWISE/ ---
UNTIL CHOKE VALVE
- - V _
JUST CLOSES
` .
y
(D
HOLD PRIMARY
CHOKE
0
PLACECAM
FOLLOWER ON
~~
THROTTLE VALVES
WIDE OPEN
BEND TANG ' -
TOADJUST ~
COIL ADJUSTMENT
HIGHES STEP
OF AMT
-
USING TOOL 1-5197
UNLOADER AMJUSTMENT
9
10
-
SEND TANG
\ TO ADJUST
USING
OI LIGHTLY OPEN PRIM"
TOOL 1-5197
.
JUSTHROTTLE ACTS
TANG
A SECONDARY LMIR
~RGL0
AIR VALVE
1 '1
'0I
SLIGHTLY OPEN I
r
iw
1FIE0 CLEARANJ
_
BETWEEN FRONT E
OF AR MALY
I ,
n
a
BEND TANG
a
O !
WITH LINK AGAINST TANG TO ADJUST
THERE SHOULD BE 010
USING
CLEARANCE BETWEEN
TOOL 1-5197
- ~,- LINK AND TANG AT THIS
POINT
1
AIR VALVE LOCKOUT ADJUSTMENT
SECONDARY OPINING
ADJUSTMENT
A-4348