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4.3470 Forged-Rour P .021L 609 520 LW-11621*,LW-13623* 4.3290 4.3605 Cast-Cam N 4.3805 .018L 610 521 B 69841*,69958,70396 4.8290 4.8620 Cast-Cam P-C 4.8805 .018L
69958 4.8290 4.8620 Cast-Cam P 4.8805 .018L G,S,T 73196,74059,75413 5.0790 5.1090 Cast-Cam P-C-N 5.1305 .018L G 69337 5.0790 5.1090 Forged-Cam P-C 5.1305 .018L J,S,Y,T 71594*,72967*,74530*,
J,S,Y,T75089* 5.0790 5.1090 Cast-Cam P-C-N 5.1305 .018L B D LW-15357* 5.0790 5.1090 Cast-Cam N 5.1305 .018L S,T,AF 73264*,75617*,76966,
S,T,AF  78203*, LW-10207*, LW-13358*,LW-14610*, LW-11487*,LW-10545 5.0790 5.1090 Forged-Cam N-C 5.1305 .018L
T LW-13396* 5.0790 5.1090 Cast-Cam N 5.1305 .018L
NOTES:
To find the averagediameterof cylinderin anarea4" above Maximumtaperr andout-of-roundpermittedfor cylinderin bottom of barrel: First, measurediameterat right angles serviceis.0045inch. from planein which valvesare located.Second,measure diameterthroughthe planein whichvalvesarelocated.Add SeeServiceInstruction No. 1243for identificationof cast both diameters;thissum,dividedby 2, representstheaverage andforged pistons.The suffix "S" that will befound with diameterof thecylinder. the part number
er on 76966, 78203, LW-10207,LW-10545, LW-11487, LVW-13358,LW-14610 pistons indicates the *=HighCompression. piston weightiss within the limits specifiedfor any groupof pistons and may
ay be substitutedfor any like piston on a CylinderBarrel:P=plainsteel,N=nitridehardened,C=chrome particular engirne. Other pistons are manufacturedwithin plated. weight limits that
do not require any weight controlled pistonfor repla(cement. To find the averageout-of-round, measurediameterof
cylinderin anarea4" abovebottom of barrel:First,measure Pistondiameterat top is measuredat top ringland(betweendiameterat right anglesfrom plane in which valvesare top andsecondcompressionring grooves)at right angleto located.Second,measurediameterthrough the planein pistonpin hole;; diameterat bottom of pistonis measuredat
whichvalvesarelocated.Differencebetweendiametersmust the bottom of the piston skirt at right anglesto the piston not exceed.0045inch. pin.SeeServiceInstructionNo.1243for illustration.
SSP1776  1-7

 

SERVICE TABLE OF LIMITS

PART 1 DIRECT DRIVE ENGINES SECTION II CYLINDERS
Ref. New  Ref. Old  Chart  Nomenclature  Dimensionsnsions Mfr. Min. Serv. & Max. Max.  Clearances Mfr. Min. Serv. & Max. Max. 
611  523  A  Exhaust Valve Seat and Cylinder Head  .0065T .010T  (A) 
B-D-G-J-S-T-Y-BD-BE  Exhaust Valve Seat and Cylinder Head  .0045T .008T  (A) 
S1-S2-S3-S5-S6-S7-S9-S10-T2-T3-AF  Exhaust Valve Seat and Cylinder Head  .0075T .011T  (A) 
A  O.D. Exhaust Seat  2.0025 2.004 
B-D-G-J-S-T-Y-BD-BE  O.D. Exhaust Seat  1.7395 1.741 
S1-S2-S3-S5-S6-S7-S9-S10-T2-T3-AF  O.D. Exhaust Seat  1.9355 1.937 
　
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