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13a

13b

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DISASSEMBLY/REASSEMBLY

Alwayscheckthethespringandvalvetomakesuretheyarein

agoodconditions.

Rocker arm cover - Breather ricirculation

Crankcasevaporrecirculationoccursthroughduct4.

Iftheairlterclogs,theincreasedintakevacuumcouldsuckoilthrou-

ghduct4intothecombustionchamber,causingtheenginetooperate

atarunawayrate.Thisispreventedbyvalcuumvalve2which,when

the vacuum increases, overcomes the resistance of spring 3 and

shutstheduct4.

Makesurethatoilplug5iscorrectlyclosed.

Retcover1andtightenrockerarmcoverto10Nm.

Setvalve/rockerarmclearance when theengineiscold:bringpiston

to top dead center on the compression stroke and set clearance at

0.10-0.15mmusingathicknessgauge.Tightenlocknut.

N.B.: Since an automatic decompression device is available on the

exhaustlobe,manualyrotatetheengineuntilthetappetsareat

lowestpoint.

When replacing the rocket arms, position the piston at the bottom

dead centre and tighten the xing screw gradually to adjust the

hydraulictappets.

Whiletightening,makesurethatA tscorrectlyintoB(g.13a).

Theadjustingscrewpinshouldbetightenedto20Nm.

Do not start the engine for approximately 4 hours to allow the

hydraulic tappets to settle completely.

Oncethetappetshavesettled,tightentheboltto10Nm.

KD 225_315_350_400_440 Workshop Manual_cod. ED0053029330_1° ed_ rev.00

Valve/rocker arm clearance ( KD 225-315-350 )

The engines KD 400 and 440 have hydraulic tappets, therefore

no adjustment is required.

Kohler KD400 Workshop Manual

Other manuals for Kohler KD400