AN032
12. Remove the eight nuts, lock washers, and washers securing the cylinders to the crankcase; then using a rubber hammer, gently tap the cylinders and remove from the crankcase by lifting them straight up off their studs. Account for two gaskets.
AN036
! CAUTION DO NOT use any type of punch to drive the piston pin free of the piston; damage may result. Use a piston-pin puller only.
When removing a cylinder, be sure to support the piston to prevent damage to the crankcase and piston.
15. Lift the pistons clear of the connecting rods and remove the small-end connecting-rod bearings; then remove the piston rings. Keep each piston with its rings; keep each piston pin and bearing together as a set.
NOTE: The metal cylinder base gaskets may be reused. When reusing gaskets, they must be cleaned and sprayed with Copper Coat Gasket Sealant (p/n 0636-092) on each side.
NOTE: Place rubber bands over the connecting rods and around the cylinder studs. This will prevent the connecting rods from damaging the crankcase.
! CAUTION
16. Remove the two screws, lock washers, and washers securing the oil-injection pump to the crankcase. Remove the pump, retainer, and O-ring. 17. Remove the water pump cover. Account for the Oring gasket. 18. Remove the cap screw securing the water pump impeller; then slide the impeller free of the shaft. 19. Using an impact driver, remove the screws securing the PTO-end plate to the crankcase; then remove the plate. AN033
NOTE: If servicing the intake flanges, remove them at this time.
13. Remove the PTO-side piston-pin circlip from the PTO-side piston; then remove the MAG-side piston-pin circlip from the MAG-side piston. 14. Using the Piston Pin Puller (p/n 0644-328), remove the piston pins from both pistons. NOTE: For proper assembly, keep all MAG-side components and all PTO-side components separated. Assemble them on their proper sides.
20. Position the crankcase (with its bottom side up) on two blocks of wood. Remove the fourteen cap screws securing the crankcase halves. Note the position of the different-sized cap screws. 21. Separate the crankcase halves by installing two crankcase cap screws in opposite corners leaving the heads approximately 6 mm (1/4 in.) out. Using a plastic-tipped hammer, tap on each cap screw head until the case halves separate. Remove the cap screws.
! CAUTION DO NOT drive any tool between halves to separate the crankcase. Damage to the sealing surfaces will result.
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