Perkins Phaser Series - Page 48

12 CYLINDER HEAD ASSEMBLY
Tappets
Diameter of tappet stem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,99/19,01 mm (0.7475/0.7485 in)
Diameter of tappet bore in cylinder block . . . . . . . . . . . . . . . . . . . 19,05/19,08 mm (0.7500/0.7512 in)
Clearance of tappet in cylinder block . . . . . . . . . . . . . . . . . . . . . . . . . 0,04/0,09 mm (0.0015/0.0037 in
Rocker shaft
Outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19,01/19,04 mm (0.7485/0.7495 in)
Rocker levers and bushes
Diameter of parent bore for bush . . . . . . . . . . . . . . . . . . . . . . . . . 22,23/22,26 mm (0.8750/0.8762 in)
Outside diameter of bush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22,28/22,31 mm (0.8770/0.8785 in)
Interference fit of bush in rocker lever . . . . . . . . . . . . . . . . . . . . . 0,020/0,089 mm (0.0008/0.0035 in)
Internal diameter of fitted bush when reamed . . . . . . . . . . . . . . . . 19,06/19,10 mm (0.7505/0.7520 in)
Clearance between rocker lever bush and rocker shaft . . . . . . . . . . . . 0,03/0,09 mm (0.001/0.0035 in)
Maximum permissible clearance between
rocker lever bush and rocker shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,13 mm (0.005 in)
12A.28 Perkins Phaser/1000 Series, April 1995