506 568 ALL
507 938 ALL

Nomenclature
Diameter of Connecting Rod Journal on Crankshaft (2-1/4in.)
Connecting Rod BearingBore Diameter (2-1/8 in.)
°

(MeasuredAt Axis 30 on Each Side)
Connecting Rod BearingBore Diameter (2-1/4 in.)
°

(MeasuredAt Axis 30 on Each Side)
Connecting Rod -Side Clearance
Connecting Rod -Alignment
Connecting Rod -Twist
Crankshaft Run-Out at Center Main Bearing
Mounted on No. 1 and 4 Journals Max.Run-Out No. 2 Journal
Mounted on No. 1 and 4 Journals Max.Run-Out No. 3 Journal
Mounted on No. 2 and 4 Journals Max.Run-Out No. 3 Journal
Mounted on No. 2 and 5 Journals Max.Run-Out No. 1 Journal
Mounted on No. 2 and 5 Journals Max.Run-Out No. 3 Journal
Mounted on No. 2 and 4 Journals Max.Run-Out No. 3 Journal
Mounted on No. 3 and 5 Journals Max. Run-Out No. 4 Journal
Mounted on No. 2 and 6 Journals Max.Run-Out No. 1 Journal
Mounted on No. 2 and 4 Journals Max. Run-Out No. 3 Journal
Mounted on No. 3 and 5 Journals Max. Run-Out No. 4 Journal
Mounted on No. 4 and 6 Journals Max. Run-Out No. 5 Journal
Mounted on No. 2 and 6 Journals Max. Run-Out No. 3,4 and 5 Journals
Crankshaft and CrankcaseFront End Clearance
Clearance-Front Face of Crankshaft Oil Slingerto
Front Face of Recess in Crankcase (Crankshaft Against
Thrust Face)
Dimensions
Mfr. 
Min.  Serv.
 
&  Max. 
Max. 

2.2485
2.250 (E)
2.2870 2.2875
2.4205 2.4210
Clearances
Mfr. Min. SServ. & Max. Max.
.004L .010L .016L .010 in 10 Inches .012 in 10 Inches
.002 .005 .003 .002 .005 .003 .003 .002 .003 .003 .003
.005
.009L .016L
002
.002 .0075 .0045 .002 .0075 .0045
.0045 .002 .0045 .0045 .0045
.0075 .026L
(A)

SSP1776  1-2

PART 1 DIRECT DRIVE ENGINES SECTION I CRANKCASE, CRANKSHAFT,CAMSHAFT
Ref. New  Ref. Old  Chart  Nomenclature  Dimensions Mfr. Min. Serv. & Max. Max.  Clearances Mfr. Min. & Max.  Serv. Max. 
508  ALL  Crankshaft Prop. FlangeRun-Out  .002  .005 
509  ALL  Starter Ring Gear and Support  .014T .022T  (A) 
510 511  504  A-B-D-G-J-S-T-Y-AF BD-BE A-B-D-G-J-S-T-Y-AF  Crankshaft Timing Gear and Crankshaft Tappet Body and Crankcase  .0005T .0010L .0010L .0033L  (A) .004L 
BD-BE  Tappet Body and Crankcase  .0010L .0030L  .004L 
A-B  O.D. of Tappet  .6232 .6240  .6229 
B1-D-G-J-S-T-Y-AF  O.D. of Tappet  .7169 .7177  .7166 
BD-BE  O.D. of Tappet  .8740 .8745  .8737 
　
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