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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.
Fig 8.7

8.3.2 Tappet housing check


Use an internal dial gauge to measure the diameter of the tappet housings X.
Use value of A detected (Par. 8.3.1) to 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.

     

 

Tab. 8.4 Tappets and tappet housing size.

REF. DIMENSIONS (mm) CLEARANCE VALUE (mm)
A 11.966 - 11.984

 

0.060 - 0.105
X 12.000 - 12.018
B 46.5 ± 0.2 ---

Fig 8.8
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