Mfr. Min. & Max.  Serv. Max. 
.004 .015  .020 
.006 .014  .020 
.004 .015  .020 
.004 .015  .020 
.004 .015  .020 
.004 .015  .020 
.006 .014  .020 
.006 .014  .020 
.008 .015  .020 
.008 .012  .020 
.004 .015  .020 
.004 .015  .020 
.003 .005  .012 

.002 .005 .015
.004 .015 .020
.0013 .0073 .010
.004 .015 .020
.004 .015 .020
.004 .015 .020
.004 .015 .020
PART 1 DIRECT DRIVE ENGINES
SECTION IV BACKLASH
Ref. Ref. Chart Nomenclature Dimensions Clearances Mfr. Mfr. New Old Min. Serv. Min. Serv. & Max. & Max. Max. Max.
819 973S-T-AF Crankshaft Gear and AN Fuel .004 (DUALMAGNETO) Pump Idler -Backlash .015 .020
820 974 T-AF  Hydraulic Pump and Crankshaft.004 Idler- Backlash .015 .020
821 676 G-J-S  Propeller Governor Drive and Crankshaft Idler -Backlash .004 (Rear Governor) .020
822 G1-G2-S2-S4-S6-Propeller Governor Idler and T-AF Camshaft -Backlash (Front .004 Governor) .020
823 669 G1-G2-S2-S4-S6-Propeller Governor Drive andT-AFIdler -Backlash (Bevel.004
:::::::T-AF
Gears) (Front Governor)  .015
824 669 BD-BE  Propeller Governor Drive and Camshaft -Backlash (Bevel.003 Gears) (Front Governor) .011 .015
825 550 D  Crankshaft Timing Gear and.004 Camshaft Gear -Backlash .015 .020
826 551 D  Camshaft Gear and Generator .004 Gear -Backlash .015f .020
827 552 D  Crankshaft Gear and Generator .004 Gear -Backlash .015 .020
828 562 D  Magneto Coupling Spline -.001 Backlash .005 .0075
829 621 D Vacuum Pump Gear and Vacuum.004 831 636 D Pump Drive Gear -Backlash .015 .020
766 766
:::::::::
830 635: D  Starter Drive and Bendix Drive .004
8
Gear -Backlash  .015 .020
:::::::: Bendix Drive Shaft Spline andBendix Drive Gear Spline -.001 Backlash .006 .015
Injector Pump Idler Gear and Injector Pump Drive Shaft .004 Gear -Backlash .015 .020
SSP1776
1-29
SECTIONIV BACKLASH
CAMSHAFT-TACHOMETER-CRANKSHAFTIDLER
PROP GOVERNOR
ECCENTRIC
805
TACHOMETERMAGNETO VACUUMAC FUEL PUMP-IDLER 822 CRANKSHAFT
PROP GOV.
360 DUAL MAG.
CAMSHAFTAT FRONT CAMSHAFTAT REAR 0-FRONT GOVERNOR
CRANKSHAFTIDLER CRANKSHAFT
FUEL PUMP IDLER
FUEL PUMP DRIVE

AN FUEL PUMP OPTION
DUAL DRIVE OPTION 0-235, 0-320, 0-340 & 0-360 ALL VIEWS SHOWN FROM REAR OF ENGINE
Backlash(AccessoryDrives)
SSP1776
1-30
PART 1 DIRECT DRIVE ENGINES
SECTIONIV BACKLASH
　
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