HEIGHT TO MEASURE THE PISTON
Specification Desc./Quantity
A 10 mm
B 43 mm
CYLINDER - PISTON
Specification Desc./Quantity
Cylinder diameter C 88 +0.018-0.01 mm
Piston Ø P 87.968 ±0.014 mm
COUPLING CATEGORIES
Name Initials Cylinder Piston Play on fitting
Cylinder- Piston A 87.990÷87.997 87.954÷87.961 0.029÷0.043
Cylinder- Piston B 87.997 ÷ 87.004 87.961 ÷ 87.968 0.029÷0.043
Cylinder- Piston C 88.004÷88.011 87.968÷87.975 0.029÷0.043
Cylinder- Piston D 88.011÷88.018 87.975 ÷ 87.982 0.029÷0.043
N.B.
THE PISTON MUST BE INSTALLED WITH THE ARROW FACING TOWARDS THE EXHAUST SIDE,
THE PISTON RINGS MUST BE INSTALLED WITH THE WORD «TOP» OR THE STAMPED MARK
FACING UPWARDS.
- Calculate the coupling clearance between pin
and connecting rod end.
Characteristic
Standard clearance:
0.015 ÷ 0.029 mm
- Measure the capacity diameter on the piston.
Characteristic
Standard diameter:
22 + 0.006 + 0.001 mm
- Calculate the piston pin coupling clearance.
N.B.
THE PIN HOUSINGS HAVE 2 LUBRICATION CHANNELS. FOR THIS REASON, MEASUREMENT
MUST BE MADE ACCORDING TO THE PISTON AXIS.
Characteristic
Standard clearance:
0.001 ÷ 0.010 mm
GP 800 i.e. Characteristics
CHAR - 17
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