Craftsman 247.77641 Operator's Manual

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]i!illFLEXIBLE PUMP COUPLERTheflexible pumpcoupleris a nylon"spider"insert,locatedbetweenthe pumpandthe engine shaft.Overtime,the couplerwillhardenanddeteriorate.Replacethecouplerif you detectvibrationor noisecomingfromthearea betweenthe engineand the pump.If thecouplerfails completely,youwill experiencea loss of power.iMPORTANT:Neverhit the engineshaftin any manner,as a blowwillcausepermanentdamageto the engine.1. Removethethree nutsthat securethe pumpto the couplingshield.Twonuts are at the bottomcornersand one is in the top center.SeeFigure5-2.2. Removethepump.3. Rotatethe engineby slowlypullingthe starterhandleuntiltheenginecouplinghalf set screwis visible.Loosenthe set screwusingallen wrenchand slidethe couplinghalfoff the engineshaft.4. Loosenthe set screwon the pumpcouplinghalf and removethecouplinghalf.5. Slide thenewengine couplinghalf ontotheengine shaftuntil theend of the shaftis flush with the inner portionof the couplinghalf.(Theremustbe space betweenthe end of the enginesupportbracketand couplinghalf). Tightenthe set screw.6. Installthe pumpcouplinghalfand key on thepump shaft.Rotatethe couplinghalf untilthe set screwfaces theopeningin the shield.Do nottightenthe set screw.7. Installthe nylon"spider"ontothe enginecouplinghalf.8. Align thepumpcouplinghalfwith the nylon"spider"by rotatingtheengineusingthe starterhandle.Slide thecouplinghalfinto placewhileguidingthreemountingbolts throughholesin pumpsupportbracket.9. Securewith the nuts removedearlier.10.Set .010"to .060"clearance/gapbetweenthe nylon"spider"andthe enginecouplinghalf byslidinga feelergaugeor matchbookcoverbetweenthenylon"spider"and the enginecouplinghalf andmovingpumpcouplinghalfas needed.Securepumpcouplinghalfwith set screw.See Figure5-2./ScrewSide View-Coupler; .oooo.0100Figure 5=2tighteningthe set screw.JTIRESThe maximumpressurefor the tires is 30 psi. Do notexceedthemanufacturer'srecommendedpsi underany circumstances.Maintainequal pressureon all tires.Excessivepressurewhenseatingbeadsmaycausethe tire/rimassemblyto burstwith force sufficientto cause seriousinjury. Refertcsidewallof the tirefor the recommendedpressure.NOTE:Makecertainthe properclearance/gapis obtainedbefore14