Kohler KD350 - Automatic Decompression; Camshaft End Play; Dynamic Balancer (On Request)

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DISASSEMBLY/REASSEMBLY
Automatic decompression
With the engine at a standstill and up to a rate of about 300 RPM,
spring1,acting onweights2 and 3vialever 4 andpin 5, keepsthe
exhaustvalveopenduringthecompressionphasealso.
Once the engine exceeds the 300 RPM rate, weights 1 and 2 keep
pin5intheholdpositionowingtotheactionofthecentrifugalforce.In
thisposition,cam6canregularlycontroltheexhaustvalvethankstoa
ridgeonthepinitself.
Sincethereisthennocompressioninthecylinder,theenginewillea-
silystartwhentheself-winderisused.
Camshaft end play
Perform this check before tting cylinder head and tappets including
theinjectiontappets.
Temporarilytcamshaft1completewithwasher;tightengearcover2
to25Nm.
Checkendplaybymovingthecamshaftbackandforthusingasuita-
bletool;theendplayvalueis0.10÷0.25mmandisnotadjustable.
Dynamic balancer (on request)
Thedynamicbalancerissupportedbytwoidenticalballbearingshou-
sedinthecrankcaseandinthegearcoveronthetimingsiderespec-
tively.
1isthereferencepointfortimingwiththecranksaftgear(seebelow).
Dimensions(mm):
A =14.983-14.994
B =14.99-15.00
C =34.89-35.00
D=34.958-34.983(bearinghousingdiameteroncrankcaseandgear
coverontimingside).
KD 225_315_350_400_440 Workshop Manual_cod. ED0053029330_1° ed_ rev.00