1194 / 1525
ENGINE
27
Fig. 8
STANDARD AND REPAIR SIZES OF TAPPET BORES & TAPPETS :
Fig. 8
Size
Tappet bores in
Outer dia of
engine crank case
tappet
Dim 'A'
Dim 'B'
Standard
28.033/28.000
27.99/27.98
mm
Repair size I
28.233/28.200
28.19/28.18
mm
(Grey)
Repair size II
28.533/28.500
28.49/28.48
mm
(White)
Repair size III
28.783/28.750
28.74/28.73
mm
(Yellow)
Diametral clearance of tappets in their bores.
0.010-0.053
mm
Maximum permissible run out of tappet face which comes in contact with
0.03
mm
cam surface (with respect of tappet axis)
Minimum hardness of tappet face which comes in contact
500
HB
with cam lobe surface.
50
HRC
Maximum permissible ovality of tappet outside diameter
0.01
mm