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AQ-AZ O.D. Intake Valve Stem  .4022 .4030 .4010
616 527 AQ-AZ  Finished I.D. Intake Valve .4040 Guide .4050
617 951 AQ-AZ  Intake and Exhaust Valve and Valve Cap -Clearance (Rotator .000 Type With Small Diameter Head) .004L .005L
618 952 AQ-AZ Dry Tappet Clearance .040 .105 619 611 AQ-AZ
Valve Rocker Shaft and Valve .0001L Rocker Bushing .0013L .0025L
AQ-AZ  Finished I.D. of Valve Rocker Shaft (Bushing) in Cylinder .6246 Head .6261 .6270
620 531 AQ-AZ  Valve Rocker Shaft and Valve .0007L Valve Rocker Bushing .0017L .004L
AQ-AZ  Finished I.D. of Rocker Arm .6252 Bushing .6263 .6270
AQ-AZ O.D. Valve Rocker Shaft  .6241 .6245 .6231
621 532 AQ-AZ  Valve Rocker Bushing and Bushing Must Be Valve Rocker Burnished In Place
622 612 AQ-AZ  Valve Rocker Shaft Bushing .0022T and Cylinder Head .0038T
(A)
AQ-AZ  Valve Rocker Shaft Bushing .7380
Hole in Cylinder Head .7388

623 533 AQ-AZ  Valve Rocker and Cylinder Head .002L -Side Clearance .020L .024L
SSP1776
2-9
SERVICE TABLE OF LIMITS
PART II INTEGRAL ACCESSORY DRIVE ENGINES
SECTIONII CYLINDERS
INTAKEVALVECAP CLEARANCE-ROTATORTYPE
614 616  615 
612 CHOKE  611  606-607 
605  600  605 
Cylinder,Piston  and Valve Components 

Cylinder, Piston and Valve Components
2-10
PART II INTEGRAL ACCESSORYDRIVE ENGINES
SECTIONIII GEAR TRAIN
Chart Nomenclature Dimensions Mfr. Min. & Max.
Oil Pump Drive Shaft and
Oil Pump Body
Oil Pump Drive Shaft and
Oil Pump Cover
Oil Pump Impellers -Diameter
Clearance
Oil Pump Impellers -Side
Clearance
Width of Oil Pump Impellers 1.372
1.374
Oil Pump Driven Impellers and Idler Shaft
Fuel Pump Idler Gear and Shaft
Fuel Pump Idler Gear -End Clearance
Fuel Pump Drive Shaft Gear and Crankcase
Fuel Pump Drive Shaft Gear -End Clearance
Front Governor Drive Idler Shaft (Both Ends) and Crankcase
Governor Driven Gear and
Crankcase
Propeller Governor Drive Gear -End Clearance
Tachometer Drive Shaft and Adapter
Vacuum and Hydraulic Pump Drive Shaft Gear and Crankcase
Vacuum and Hydraulic Pump Drive Shaft Gear -End
Clearance
Magneto Coupling and Crankcase
Magneto Drive Shaft Gear and Crankcase
Accessory Drive Gear Intermediate and Crank-
case (2 Places)
Accessory Drive Gear -End Clearance
Accessory Drive Gear and Crankcase
2-11
Serv.
Max.

1.371
Clearances
Mfr. 
Min.  Serv. 
&  Max. 
Max. 
.0010L 
.0030L  .004L 
.0035L 
.0050L  .0065L 
.002L 
　
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