Yangdong Co. Y90 Series Manuel de service télécharger pdf (Page 25)

OPERATION&MAINTENANCE MANUAL

and then clamp the needle valve with iron thread plier, and pull out lightly to avoid

napping. When cleaning the needle valve parts, scratch with wooden piece with

gasoline or diesel but metal piece is not allowed. When the needle valve and its parts

are not smooth or the movement is inflexible, grind adjustment can be carried out. Use

clean diesel when grinding. Grinding in pairs shall not impact on the needle valve or its

stand, and clean after grinding without any metal dirt reserved.

4、adjustment of lube oil pressure

Adjustment of oil pressure is shown in Figure 3. Loosen and fasten the nuts; adjust the

nuts with spanner to make the oil pressure within 200-400kPa (it is allowed to be

higher when the machine is cold). Screw up the nuts after adjustment.

Figure 3: adjustment of lube oil pressure

5、adjustment of injection pump

The oil injection pump has been adjusted and checked before delivery. If

re-adjustment is required, it shall be carried out on special oil injection pump test bend

fro standard oil injector and standard length high pressure oil pipe according to relevant

instructions on oil injection pump.

6、adjustment of decompression arm lash

Turn the Crank to the first cylinder piston stop position, when the “0” scale on the crank

belt wheel aims exactly with the indicator in the timing gear cover. Inset the thick and thin

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Yangdong Co. Y90 Series Manuel de service Page 25