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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

Kohler KD350 Repair Manual

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