Branson F42r - Page 159

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CHAPTER 2 ENGINE3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
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7.3.2 CYLINDER BLOCK
ITEM STANDARD LIMIT NOTE
Cylinder bore
L Ø 88.015 ~ Ø 88.025
Ø 88.20
S Ø 88.005 ~ Ø 88.015
Cylinder roundness
0 ~ 0.01 0.03
Cylindricity
0 ~ 0.015 0.03
7.3.3 VALVE ROCKER ARM
ITEM STANDARD LIMIT NOTE
Intake & Exhaust
rocker arm
Rocker arm shaft outer dia. Ø 15.959 ~ Ø 15.98 Ø 18.95
Rocker arm inner dia. Ø 19.0 ~ Ø 16.021 Ø 19.09
Oil clearance
0.020 ~ 0.062
0.14
Pushrod bending 0.03 or less 0.25 or less -
Tappet
Tappet stem outer dia. Ø 14.224~Ø 14.249 Ø 14.18
Tappet guide hole inner dia. Ø 14.260~Ø 14.280 Ø 14.30
Oil clearance
0.011 ~ 0.056 0.12
ITEM STANDARD LIMIT NOTE
Piston outer dia.
A Ø 87.965~Ø 87.975
Ø 87.90
C Ø 87.960~Ø 87.965
Minimum clearance between piston and cylinder block
0.040 ~ 0.070 -
Top clearance 0.8 -
Piston and piston pin
Piston pin outer dia. Ø 30.0 ~ Ø 29.991 Ø 29.90
Piston pin hole inner dia. Ø 30.0 ~ Ø 30.008 Ø 30.02
Oil clearance
0 ~ 0.017 0.12
7.3.4 PISTON