1970 CCW 340 Service Manual - Vintage Snow

SECTION VREASSEMBLY, TESTING AND ADJUSTMENTSc5.1 GENERAL. 5.1.1 Prior to reassembly, check al l parts for cleanliness andserviceability in accordance with paragraph 3.3.5.1.2 During assembly, tighten all screws, bolts and nutssecurely. Ensure that correct torque values are applied wherespecified. Do not overtorque.5.1.3 Use only new gaskets and seals during assemblyprocedure.5.1.4 During assembly, lubricate all bearings and frictionsurfaces with new, clean two stroke engine oil.5.1.5 If procedures are discontinued during assembly,ensure that intake and exhaust ports, spark plug holes and allother open ings are covered to prevent ingress of dirt orforeign objects to cylinders and crankcase.5.2 REASSEMBLY5.2.1 Crankcase and Crankshaft (See Figure 5-1)a. Place crankcase lower half on work bench with flanged fancover end to right hand side; insert the four seal retainingcirclips .Install the crankshaft into lower half of crankcase withexternally threaded (flywheel) end of shaft toward righthand side. (See Section Ill, figure 3-12). Ensure that sealretaining circlips do not become dislodged.b. Apply a liberal amount of two-stroke engine oil tocrankshaft and bearings.c. Apply a good quality, non hardening sealing compoundevenly to seal ing surfaces of both crankcase halves.d. Reseat the crankcase halves; ensure that the two dowelpins are properly engaged with mating holes in crankcaseupper half.e. Refer to Figure 5-2 ..Install four 8 x 65 and six 8 x 45 attaching bolts, washersand lockwashers. Install the four longer bo lts at locations2, 3, 4 and 7. Loosely tighten the four bo lts at locations"A", then torque al l bolts down evenly to 15-18 footpoundsmaximum in acco rdance with sequence shownin the illustration.5.2.2 Pistons, Piston Rings and Pins (See Figure 5-3)a. Lubricate piston pin needle bearing with two-strokeOilseal Retaining circlipsFig. 5-1 Crankcase Lower Half5-1