Honda AFRICA TWIN XRV750 (1987-2002) [278/291] Tools and workshop tips
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Honda AFRICA TWIN XRV750 (1987-2002) [278/291] Tools and workshop tips

Honda AFRICA TWIN XRV750 (1987-2002) [278/291] Tools and workshop tips

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Tools and Workshop Tips REF IZ Use a bearing driver or socket which bears only on the outer hard edge of the seal to install it in the casing tapping on the inner edge will damage the sealing lip Oil seal types and markings 9 Oil seals are usually of the single lipped type Double lipped seals are found where a liquid or gas is on both sides of the joint Oil seals can harden and lose their sealing ability if the motorcycle has been in storage for a long period renewal is the only solution Oil seal manufacturers also conform to the ISO markings for seal size these are moulded into the outer face of the seal see illustration 6 2 6 2 These oil seal markings indicate inside diameter outside diameter and seal thickness 7 Gaskets and sealants impregnated in its surface before applying additional sealant When choosing a sealant make sure it is suitable for the application particularly if being applied in a high temperature area or in the vicinity of fuel Certain manufacturers produce sealants in either clear silver or black colours to match the finish of the engine This has a particular application on motorcycles where much of the engine is exposed Do not over apply sealant That which is squeezed out on the outside of the joint can be wiped off whereas an excess of sealant on the inside can break off and clog oilways Breaking a sealed joint Age heat pressure and the use of hard setting sealant can cause two components to stick together so tightly that they are difficult to separate using finger pressure alone Do not resort to using levers unless there is a pry point provided for this purpose see illustration 7 1 or else the gasket surfaces will be damaged Use a soft faced hammer see illus tration 7 2 or a wood block and conventional hammer to strike the component near the mating surface Avoid hammering against cast extremities since they may break off If this method fails try using a wood wedge between the two components Most components have one or two hollow locating dowels between the two gasket faces If a dowel cannot be removed do not resort to gripping it with pliers it will almost certainly be distorted Install a close fitting socket or Phillips screwdriver into the dowel and then grip the outer edge of the dowel to free it the sealing faces of the components It is imperative that all traces are removed to ensure correct sealing of tine new gasket Very carefully scrape all traces of gasket away making sure that the sealing surfaces are not gouged or scored by the scraper see illustrations 7 3 7 4 and 7 5 Stubborn deposits can be removed by spraying with an aerosol gasket remover Final preparation of Caution If the joint will not separate double check that you have removed all the fasteners Types of gasket and sealant Gaskets are used to seal the mating surfaces between components and keep lubricants fluids vacuum or pressure contained within the assembly Aluminium gaskets are sometimes found at the cylinder joints but most gaskets are paper based If the mating surfaces of the components being joined are undamaged the gasket can be installed dry although a dab of sealant or grease will be useful to hold it in place during assembly 7 1 If a pry point is provided apply gently RTV Room Temperature Vulcanising pressure with a flat bladed screwdriver silicone rubber sealants cure when exposed to moisture in the atmosphere These sealants are good at filling pits or irregular gasket faces but will tend to be forced out of the joint under very high torque They can be used to replace a paper gasket but first make sure that the width of the paper gasket is not essential to the shimming of internal components RTV sealants should not be used on components containing petrol gasoline Non hardening semi hardening and hard setting liquid gasket compounds can be used with a gasket or between a metal to metal joint Select the sealant to suit the application 7 2 Tap around the joint with a soft faced universal non hardening sealant can be used mallet if necessary don t strike cooling fins on virtually all joints semi hardening on joint faces which are rough or damaged hard Removal of setting sealant on joints which require a old gasket and sealant permanent bond and are subjected to high temperature and pressure Note Check first if Paper gaskets will most likely come away the paper gasket has a bead of sealant complete leaving only a few traces stuck on 7 3 Paper gaskets can be scraped off with a gasket scraper tool 7 4 a knife blade 7 5 or a household scraper

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