1970 CCW 340 Service Manual - Vintage Snow

®-------41--------1. 3 }---------{ l--------1. 7"'Cc:"'-0~ca......."' s:00.."'Cc:"'Qi.r; "'s::?:u..6 }---------{ 1-------'{ 2 1---- - ---1 )---------{ 4AAFig. 5-2 Crankcase Bolt Torquing Sequenceengine oil and install bearing into connecting rod smallend.b. If both piston pin retaining circl ips have been removedfrom piston, use a su itable tool and install a ci rclip at onepiston pin bore.c. Use a propane torch or cloth soaked in hot water and heatpiston until warm to the touch {120 to 14QOF). Ensurethat the arrow on piston crown is directed toward theexhaust port and al ign piston pin bore with center bore ofconnecting rod . Lubricate piston pin and, using a softdrift, push pin into piston until it bottoms on the installedcirclip. Exercise care to prevent damage to needle bearing.Install remaining circlip.d. Install piston rings in ring grooves, using a suitable ringinstalling too l. Ensure that piston ring gap is correctlypositioned at the ring groove locating pin .e. Repeat steps {a) to {d) for second piston.5.2.3 Cylinders (See Figure 5-4)a. Install new base gaskets over cylinder hold down studs.b. Cylinders are identified by the letters "L" {left hand ) and"R" {right hand) stamped on the cylinder flange. Locateright hand {No. 1) cylinder at flywheel end of crankcase.c. Lubri cate pistons, rings and cyl inders with two-strokeengine oil.d. Place a su itable wooden block between piston and)Piston RingsLocating Pin_;Fig. 5-3 Installing Pi stons, Rings and Pins5-2