2007 Kymco Grand Dink 250 Owners Manuals, User Guides, Instructional Help Documents & Operating Information - DINK%20szerel%C3%A9s%2Bkarbur%C3%A1tor.pdf
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11. CRANKCASE/CRANKSHAFT
GRAND DINK 250
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CRANKCASE/CRANKSHAFT __________________________________________________________________________________
SCHEMATIC DRAWING ------------------------------------------------- 11-1 SERVICE INFORMATION------------------------------------------------ 11-2 TROUBLESHOOTING----------------------------------------------------- 11-2 CRANKCASE SEPARATION -------------------------------------------- 11-3 CRANKSHAFT INSPECTION-------------------------------------------- 11-4 CRANKCASE ASSEMBLY ----------------------------------------------- 11-5
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11. CRANKCASE/CRANKSHAFT SCHEMATIC DRAWING
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GRAND DINK 250
11. CRANKCASE/CRANKSHAFT
GRAND DINK 250
SERVICE INFORMATION GENERAL INSTRUCTIONS • This section covers crankcase separation to service the crankshaft. The engine must be removed for this operation. • When separating the crankcase, never use a driver to pry the crankcase mating surfaces apart forcedly to prevent damaging the mating surfaces. • When installing the crankcase, do not use an iron hammer to tap it. • The following parts must be removed before separating the crankcase. Cylinder head (Ö6-4) Cylinder/piston (Ö7-3) Right crankcase cover/drive and driven pulley (Ö8-3) A.C. generator/starter clutch (Ö10-3) Rear wheel/rear shock absorber (Ö15-4) Starter motor (Ö19-3) Oil pump (Ö4-4) SPECIFICATIONS Item Connecting rod big end side clearance Crankshaft Connecting rod big end radial clearance Runout TORQUE VALUES Crankcase bolt Cam chain tensioner slipper bolt
Standard (mm) 0.15~0.35 0.~0.008 ⎯
Service Limit (mm) 0.6 0.05 0.10
7.8~10.8N-m 7.8~11.8N-m
SPECIAL TOOL Gear remover
TROUBLESHOOTING Excessive engine noise • Excessive bearing play • Excessive crankpin bearing play • Worn piston pin and piston pin hole
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11. CRANKCASE/CRANKSHAFT
GRAND DINK 250 Cam Chain Tensioner Slipper
CRANKCASE SEPARATION Remove the cam chain tensioner slipper bolt. Remove the cam chain tensioner slipper and cam chain. Remove the three right crankcase attaching bolts.
Bolt
Cam Chain
Remove the left crankcase.
Left Crankcase
Place the crankcase with the left crankcase down and remove the right crankcase from the left crankcase.
Right Crankcase
* • Never use a driver to pry the crankcase mating surfaces apart. Remove the gasket and dowel pins.
Left Crankcase
Remove the crankshaft from the left crankcase.
Crankshaft
Left Crankcase
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11. CRANKCASE/CRANKSHAFT
GRAND DINK 250 Oil Seal
Remove the oil seal from the left crankcase.
Left Crankcase
CRANKSHAFT INSPECTION Measure the connecting rod big end side clearance. Service Limit: 0.6mm replace if over
Measure the connecting rod small end I.D. Service Limit: 17.06mm replace if over
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11. CRANKCASE/CRANKSHAFT
GRAND DINK 250
Measure the crankshaft runout. Service Limit: 0.10mm replace if over
Measure the crankshaft bearing play. Service Limits: Axial : 0.20mm replace if over Radial: 0.05mm replace if over
Play Play
Axial
Radial
CRANKCASE ASSEMBLY Clean off all gasket material from the crankcase mating surfaces.
* • Avoid damaging the crankcase mating surfaces.
Install a new oil seal into the left crankcase.
Oil Seal
Left Crankcase
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11. CRANKCASE/CRANKSHAFT
GRAND DINK 250
Place the left crankcase down and install the crankshaft into the left crankcase.
* • Avoid damaging the oil seal.
• Apply grease to the lip of the oil seal.
Gasket
Install the two dowel pins and a new gasket.
Dowel Pins Right Crankcase
Place the right crankcase over the crankshaft and onto the left crankcase.
* • Install the right crankcase squarely and do not tap it with an iron or plastic hammer.
Left