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11 LD Workshop Manual_cod. 1.5302.296_5° ed_ rev. 04
A
11,0÷70,002,0
B
90,0÷50,061,0
C
80,0÷40,051,0
°1
mm56,0÷04,0
mm1
°2
°3
mm05,0÷52,0
4
56
57
58
60
59
Piston weight
Weigh pistons when replacing them in order to avoid unbalance.
The difference in weight should not exceed 6 g.
Compression snap ring
(chrome-plated)
Snap ring (conical
internal torsional)
Ring (oil scraper)
Limit value
(mm)
Dimensions (mm)
Ref.
Limit
value
Disassembly / Reassembly
Metal snap rings - Fitting sequence
A = Compression snap ring (chrome-plated)
B = Snap ring (conical internal torsional)
C = Ring (oil scraper)
Note: before inserting the piston in the cylinder, rotate snap rings so
that cuts are misaligned by 120° from one to the next.
Important
Assemble the segments with TOP facing the piston crown.
Metal snap rings - Piston grooves
Metal snap rings - End gaps
Insert the snap rings in the lower part of the cylinder, then measure
the distance between the tips.
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