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KH250 (1972-1976)
Инструкция по эксплуатации Страница: 96

Kawasaki KH250 (1972-1976) [96/129] Assembly notes

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jv Remove the fork piston circlip from die inner tube with pliers and then the fork piston and fork cylinder assembly fa will come out v Remove the circlip from the outer tube with a sharp hook vi Remove die flat washer gland oil seal Compression Stroke After 74 model Assembly notes 1 If the oil seal is removed replace it with a new one using a press or special tool 57001 191 2 Apply Loctite to die Allen bolt in the lower end of the outer tube 3 Replace die top bolt 0 ring if it is damaged Compression stroke When a load is placed on the front fork or when the front wheel hits a bump the inner lube 1 of the shock absorber moves downward relative to the outer tube 2 and the spring 3 is com pressed The descending inner tube forces the oil in the outer lube to flow through the hole in the cylinder 4 into the inner tube thereby compressing the air in the inner tube Al this same time the oil chamber formed by the cylinder valve 5 and inner tube is growing larger and a negative pressure is developed in it so oil from the bottom of the outer tube also flows past the piston 7 opens the valve and flows through into that chamber Near the end of the compression stroke the space between the tapered lower end of the cylinder and the piston becomes smaller and offers increased resistance to the How of oil until just before the end of the stroke oil flow is completely prevented and an oil lock condition occurs Extension stroke The outer and inner tubes are pushed apart by spring tension whenever the load is taken oil the front wheel or the wheel drops into a hole As the tubes move apart the oil chamber formed by he cyliner valve and inner tube grows smaller but since the valve is a non return type the oil cannot return through the valve the way it came Instead it flows through a hole in the upper part of the cylinder and the resistance to this flow through the hole dampens the fork extension Near the end of the extension stroke the cylinder spring 6 starts being compressed and further slows fork extension so that it does not suddenly top out Either too much or too little oil in the forks will adversely affect their shock damping ability If there is too much oil or if the oil is too heavy the shock absorbers will be too hard too little oil or too light an oil will make the fork soft and decrease damping ability and may cause the fork to be noisy during operation If the inner tube becomes bent delend scored I Inner Tube 2 Outer Tub 3 Spring 4 Cylinder 5 Valve 6 Spring 7 Piston oil seal and allow oil leakage If the tube is bcm badly enough poor handling may also result Contaminated or deteriorated oil will also affec shock damping and in addition will accelerat wear of the internal fork parts For this reaso it should be changed periodically Spring tension Since the spring becomes shorter as il weaken check its free length to find out if it is weark

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