Chevrolet DB90 Series, Руководство по обслуживанию

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Sec. 6M-101
6. A fter checking float Level, in sta ll air horn
and throttle body to main body using new g a sk ets.
R eferring to figure 2 in sta ll sc r e w s, lo ca te choke
control bracket and identification tag in original
p o sitio n s. In stall carburetor with new gasket on
FUEL SYSTEM —G A S O L IN E EN G IN ES
engine. Tighten the ca rb u retor-to-in tak e manifold
b olts or nuts to 20-25 foot-pounds torque. Connect
fa s t idle link, a ccelera tin g pump rod, fuel lin e s ,
choke w ire, and a cc e le ra to r linkage. In stall air
clea n er.
BENDIX-STROMBERG CARBURETOR MODEL APPLICATION
EXCLUDING CALIFORNIA VEHICLES
TRUCK MODEL ENGINE
GM PART
NO.
BENDIX
NO.
CODE
NO.
HM, JM80
401M or 478M 685993 381308 23-245
TM, WM80 401M or 478M 685994 381309 23 246
RM80
401M or 478M 685995 381310 23-247
HM80
478SN
674795
381299 23-243
HE, JE, TE90 637 685997 381311 23-251
CALIFORNIA VEHICLES ONLY
TRUCK MODEL
ENGINE
GM PART
NO.
BENDIX
NO.
CODE
NO.
HM, JM, TM, WM80 401M or 478M 687115 381313 23-249
TM, WM80*
401M or 478M 690120
RM80
401M or 478M 687116 381314
23-250
HM80 478SN 674795 381299 23-243
‘ with Allison MT40 Transmission
BENDIX-STROMBERG CARBURETOR SPECIFICATIONS
GM PART NO.
685993 687115
685994 687116
685995 690120 674795
685997
Venturi S iz e ....................................................................................... 1-5/16 1-5/16
1-15/32
Main Metering Jet S iz e ...................................................................... 0.065* 0.064
0.078
High Speed Bleeder No........................................................................ No. 68 No. 68
No. 68
Power By-Pass J e t .............................................................................. 1 No. 52 1 No. 53
1 No. 52
Accelerating Pump Discharge Jet No...................................................
70 70 70
Idle Discharge Holes:
Primary No...................................................................................... 50 50
52
Secondary No..................................................................................
60 65
60
Tertiary No...................................................................................... 56 56
56
Idle Tube Feed Hole No.......................................................................
64 64
64
Idle Air Bleed Cluster No...................................................................... 53 54
51
Vacuum Spark H o le ............................................................................ 2 No. 65
2 No. 65 2 No. 65
Float Needle Valve S e a t .....................................................................
0.113 0.113 0.113
Governor Diaphragm Spring No............................................................
389702 389702 389702
Governor Throttle Spring No................................................................ 389703
389703 389703
Throttle Spring Anchor Po sitio n.........................................................
No. 3 No. 3
No. 3
Discharge Nozzle No.............................................................................
28 28 28
Nozzle Tip to Wall:
Left ..............................................................................................
0.380 0.400
0.250
Right ............................................................................................
0.380 0.400
0.250
Float Level .........................................................................................
7/32 7/32
7/32
Accelerator Pump T ra v e l....................................................................
3/16 3/16
3/16
‘ Carburetors Part No. 687115, 687116, 690120 Main Metering Jet is 0.061.
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL SUPPLEMENT