Santana PS-10, Service Manual, Page: 317 / 627

6A-106 ENGINE REPAIR
Checking the gudgeon pins of pistons installation
5) Using a micrometer (D), measure diameter of gudgeon
pins. To check dimensions, see 6A-96.
6) Lubricate gudgeon pin (3) and seating (11) in piston. Gudgeon
pin must be introduced with a slight pressure of fingers and
must no come out of its housing by gravity
Play between bolt and seating at the piston:
0,007÷ 0,019 mm
D
F
12
2º
3
11
E
Checking the play between piston rings and piston
slits or grooves
7) Using a micrometre (E), measure the piston rings thickness .
To consult sizes, (see 6A-104).
2
nd
and 3
rd
piston rings
8) Using a thickness calliper (F) and piston rings 2nd and 3rd
placed in the piston slits or grooves, check play as shown
in the figure. Play should be as specified.
Play between piston ring slit or groove at piston:
• 2
nd
piston ring: 0,055 ÷ 0,10 mm
• 3
rd
piston ring: 0,05 ÷ 0,09 mm