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In some instances, where a parts revisionhas caused a dimensional or tolerance change, the superseded dimenional data has
been deleted from the list; provided compliance with the change is not mandatory.
Letters of the alphabet and numbers are used as symbols throughout the Table of Limits to represent specificinterpretations and to designate engine models. Letters in parenthesis refer to dimensional characteristics; letters (or
combinations of letters and numbers) without parenthesis indicate engine models. They are listed below with their separatedefinitions.
(A)  
These fits are either shrink fits controlled by machining, fits that may readily be adjusted, or fits where wear does not normally occur. In each case, the fit must be held to manufacturing tolerance.

(B)  
Side clearance on piston rings must be measured with face of ring flush with piston.

(D)  
The dimensions shown are measured at the bottom of the piston skirt at right angles to the piston pin.

(E)  
Permissible wear of the crankshaft (rod and main bearing journals) to be minus 0.0015 on the diameter.

(L)  
Loose fit; wherein a definite clearance is mentioned between the mating surfaces.

(T)  
Tight fit; shrink or interference fit.

(WD)  Wide Deck Crankcase.
i

Introduction
The illustrations shown are typical of the referenced limit or fit described in the Table and in no instance are these illustrations intended to represent a specific part or engine model unless specified. Also, the terms used to designate cylinder, piston and ring materials such as "nitride, chrome, half-wedge" are more fully explained in the latest edition of Service Instruction No. 1037.
PART I DIRECT DRIVE ENGINES (Including VO and IVO-360)
CHART MODELS CHART MODELS
A  0-235 
Al  0-235-F, -G, -K, -L 
B  0-290 
B1  0-290-D2 
D  0-435-A 
BD  0-320-H(76 Series) 
G  0, IO, LIO, AEIO-320 
G1  0, 10-320 With Gov. at Front 
(0-320-ElF, -E1J, -D1F & IO-320-D1B) 
G2  AIO-320 
J  0-340 
Y  VO, IVO-360 
S  O,  IO0,LIO, HIO, LHIO, TO, TIO, AEIO-360 
S1  TO-360 
S2  AIO-360 
S3  TIO-360 
S4  0-360-AWith Gov. at Front 
(0-360-AlH, -A1LD) 

S5  IO, LIO-360-A,-C(Angle Valve) 
S6  IO, LIO-360-A,-C With Gov. at Front 
(IO, LIO-360-ClE6 & IO-360-A1D6) 
S7  HIO-360-D 
S8  HIO-360-B 
S9  HIO-360-C, -E 
S10  HIO-360-A 
T  0, IO, LIO, AEIO, TIO, LTIO-540 
T1  0-540-G, -H & IO-540-N, -R 
(LargeMains-Parallel Valve) 
　
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