Jacobsen SXG323, Руководство по обслуживанию

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CHAPTER 4. ENGINE
57
4
If the clearance exceeds the usable limit, replace
the thrust plate.
Fig. 4-79
(5) Inspection of tappets
• Check the contact surface with the camshaft for
pitting, cracks, etc. Defective tappets should be
replaced with new ones.
Fig. 4-80
• Check the outer diameter for wear.
Replace the tappets having diameters less than
the usable limit.
• Clearance of the tappets with the cylinder block
Measure the bore diameter of each tappet hole in
the cylinder block and the outer diameter of each
tappet. Then calculate the difference.
Replace the tappets, which have clearances in
excess of the usable limit.
3.3.4. INSPECTION OF PISTONS AND CON-
NECTING RODS.
• Push a piston ring into the cylinder, using a pis-
ton as a pushing tool, to a point past the position
where the ring would be during operation i.e. to
the lower end of the cylinder wall.
Fig. 4-81
Measure the gaps of each piston ring with thick-
ness gauges.
Fig. 4-82
Replace the rings whose gaps are in excess of
the usable limit.
Standard value Usable limit
0.05 - 0.174 mm 0.3 mm
Standard value Usable limit
20 mm 19.95 mm
Standard value Usable limit
0.02 - 0.062 mm 0.1 mm