Yangdong Co. Y90 Series Manuel de service télécharger pdf (Page 14)

OPERATION&MAINTENANCE MANUAL

At normal operation 0.2～0.4

At min. steady speed ≥0.065

5. Governor characteristics

Min .Idling steady speed （r/min） ≤900 steady regulation（%）≤5

6. Oil sump capacity

YSD490ZL

oil sump

capacity

（L）

About 7

7. Battery (engine not include) capacity (A) ≥150

4、Fit clearance and wear limit of main parts

YSD490ZL

N0. Name

Assembly limit Wear limit

1 connecting rod journal and connecting rod 0.052～0.118 0.20

2 piston pin and connecting rod small end 0.025～0.048 0.10

3 piston skirt and cylinder liner 0.130～0.195 0.40

4 clearance between the 1

ring and its groove 0.080～0.112 0.20

5 clearance between the 2

ring and its groove 0.030～0.065 0.18

6 clearance between the oil scraper and its 0.030～0.065 0.18

7 gap of the 1

ring 0.309～0.450 1.50

8 gap of the 2

ring and oil scraper ring 0.250～0.400 1.50

9 crankshaft main journal and main bearing 0.070～0.154 0.25

10 camshaft journal and bushing 0.100～0.176 0.25

11 idle gear shaft journal and bushing 0.025～0.075 0.18

12 intake valve stem and valve guild 0.030～0.072 0.23

13 Exhaust valve stem and valve guild 0.040～0.082 0.24

14 rocker arm shaft and bushing 0.020～0.071 0.20

15 Axial clearance of crankshaft 0.070～0.262 0.40

16 Axial clearance of camshaft 0.080～0.260 0.50

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 50 51

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Yangdong Co. Y90 Series Manuel de service Page 14