FE02-0224b

7.

With a wood handle, remove cylinder No.1 piston rod and
mark the location of cylinder No.1.

FE02-0225b

8.

Remove  the  cylinder  No.4  connecting  rod  bearing  cap
bolts.

FE02-0226b

9.

Hold the rod bolt, remove the cylinder No.4 connecting rod
bearing caps and mark the location cylinder No.4.

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Engine Mechanical System JL4G18-D

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FE02-0227b

10. With a wood handle, remove cylinder No.1 piston rod and

mark the location of cylinder No.4.

FE02-0228b

11. Rotate the crankshaft 180 °, so that the cylinder NO.2 and

3  are  at  BDC  positions.  Remove  the  cylinder  NO.2  rod
bearing cap bolts.

FE02-0229b

12. Hold the rod bolt, remove the cylinder No.2 connecting rod

bearing caps and mark the location cylinder No.2.

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FE02-0230b

13. With a wood handle, remove cylinder No.2 piston rod and

mark the location of cylinder No.2.

FE02-0231b

14. Remove  the  cylinder  No.3  connecting  rod  bearing  cap

bolts.

FE02-0232b

15. Hold the rod bolt, remove the cylinder No.3 connecting rod

bearing caps and mark the location of cylinder No.3.

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FE02-0233b

16. With a wood handle, remove cylinder No.3 piston rod and

mark the location of cylinder No.3.

Inspection Procedures Before Installing The Piston:

FE02-0234b

1.

Check whether the rod is bent or distorted. If the rod is
bent or distorted, replace the connecting rod.

Cross Degree: 0.03/100 (Metric) 0.001/3.9 (US English)
Twisted Degree: 0.05/100 (Metric) 0.002/3.9 (US English)

2.

Check the connecting rod bearings.

3.

Check whether the bottom rod is worn.

4.

Check  whether  the  connecting  rod  upper  end  is
scratched.

5.

Check  whether  there  is  the  crankshaft  connecting  rod
bearing journal wear and tear.

6.

Check whether the piston is scratched, cracked and worn.

7.

Check the piston and piston pin mating.

Standard Value:
0.005-(-0.001)  mm  (Metric)  0.0002-(-0.00004)  in  (US
English)

8.

Check  piston  pin  and  connecting  rod  small  head  hole
clearance.

Standard Value:
0.005-0.011 mm (Metric) 0.0002-0.0004 in (US English)

9.

Check piston pin and piston pin hole clearance

Standard Value:
(-0.001)-0.005  mm  (Metric)  (-0.00003)-0.0002  in  (US
English)

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