Hisun HS500ATV-2, Maintenance Manual

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16
diagnosing and eliminating of malfunction:
●
Emission of black smoke for abrasion of cylinder or piston,
1. Cylinder, piston of piston ring is worn out.
2. The piston ring is not properly assembled.
3. The piston or cylinder wall is scraped.
●
● ●
●
overhe overhe overhe overheated ated ated ated
1
Excessive incrustation of piston.
2 Blast and abnormal noise.
3 Abrasion of cylinder or piston.
Inspection of cylinder.
项 目
item
标准值
mm
standard value: mm
维修极限值
mm
limit value:mm
气缸内径
Inner diameter of
cylinder
φ
84.503
～φ
84.527
φ
84.6
taper 0.0040 0.005
out of roundness 0.0035 0.005
cylinder
degree of warp 0.04 0.10
Outside diameter of piston
φ84.47～φ84.45 φ84.35～φ84.25
Inner diameter of piston pin
hole
φ20.002～φ20.01 φ20.05～φ20.1
gap between piston pin and
piston pin hole
0.002
～
0.019 0.03
Piston ring
end
clearance
Top ring/the
second ring
0.2
～
0.4 0.5
～
0.7
oil ring 0.03
～
0.15 0.3
～
0.5
top ring 0.03
～
0.07 0.10
～
0.15
gap between
piston ring
and piston
groove
second ring 0.02
～
0.06 0.09
～
0.14
gap between cylinder and
piston
0.033
～
0.062 0.07
～
0.10
Piston,piston
ring and
piston pin
outside diameter of piston
pin
φ19.991～φ20 φ19.95～φ19.97
Inner diameter
φ 20.016 ～ φ
20.027 φ20.05
Crank shaft
Gap between small end of
connecting rod and piston
pin
φ0.018～φ0.036 0.05