120
8
_07
A
Fig. 8.7
Fig. 8.8
B
X
C
D
D
ED0053029590
INFORMATION ABOUT OVERHAULING
8.3 Tappets and tappet housings
8.3.1 Tappets check
Use a surface plate and a dial gauge as shown in Fig. 8.7.
Check the perpendicularity of the plate C, making the tappet
D rotate in the direction of the arrow.
The MAX value of wear allowed is 0.02 mm.
With a gauge, check the length of value A and B (Tab. 8.4).
The MAX value of wear allowed is 0.08 mm
8.3.2 Tappet housing check
Use an internal dial gauge to measure the diameter of the
tappet housings X.
value of A detected (Par. 8.3.1) calculate the clearance value
(Tab. 8.4).
If the clearance values are not observed, replace the worn
component.
Important
• Tab. 8.4 details the dimensional values of new components
only.
Tappets and tappet housing dimensions.
Tab. 8.4
REF. DIMENSIONS (mm)
CLEARANCE
VALUE (mm)
A 11.9 66 - 11.98 4
0.060 - 0.105
X 12.000 - 12.018
B 46.5 ± 0.2 ...