HAIMA 7 - Page 41

Technique parameters
5
Technical specification of service
Items Parameters
Cylinder bore diameter
[measured at 37mm (1.45in)
below top surface] (mm{in})
Standard 84.00～84.03{3.3071～3.3083}
Oversize: 0.25{0.01} 84.25～84.28{3.3169～3.3181}
Oversize: 0.50{0.02} 84.50～84.53{3.3268～3.3279}
Wearing limit (mm{in}) 0.15{0.006}
Piston diameter (mm{in})
[Measured at 28mm {1.1in} below
lower edge of oil ring groove,
perpendicular to the piston pin
hole axis]
Standard 83.97～84{3.305～3.3071}
Oversize: 0.25{0.01} 84.22～84.25{3.3157～3.3169}
Oversize: 0.50{0.02} 84.47～84.50{3.3256～3.3268}
Gap between piston and cylinder
bore (mm{in})
Standard 0.02～0.04{0.0008～0.0016}
Max. 0.10{0.004}
Piston ring
Gap between
piston ring and
ring groove
(mm{in})
Top ring Standard 0.030～0.070{0.0012～0.0027}
Second ring Standard 0.020～0.060{0.0008～0.0024}
Oil ring Standard 0.040～0.120{0.0016～0.0047}
Top ring/second
ring
Max. 0.15{0.006}
Oil ring Max. 0.15{0.006}
Opening gap[measured
within cylinder] (mm{in})
Top ring 0.20～0.35{0.008～0.014}
Second ring 0.30～0.45{0.012～0.018}
Oil ring 0.20～0.50{0.008～0.020}
Max. 1.0{0.039}
Piston pin
Piston pin diameter (mm{in})
Standard
19.002～19.005{0.7481～
0.7482}
Piston pin hole diameter (mm{in})
Standard
19.010～19.015{0.7484～
0.7486}
Gap between small end hole of
connecting rod and piston pin (mm{in})
Standard
-0.031～-0.017{-0.0013～
-0.0007}
Gap between piston pin hole and piston
pin (mm{in})
Standard 0.005～0.013{0.000～0.0005}
Connecting rod and connecting rod bearing
Length [from center to
center] (mm{in})
Standard 139.9～140{5.5118～5.5079}
Small end bore diameter of
connecting rod (mm{in})
Standard
18.974～18.985{0.7476～
0.7474}
Connecting rod end gap
Standard 0.100～0.250{0.004～0.010}