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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
4
103
T/4021-4021-309-206-205WDL
A 000,27÷099,17
049,17÷039,17
070,0÷050,0
B 010,27÷000,27
059,17÷049,17
C 020,27÷010,27
069,17÷059,17
4041-3001-207WDL
A 000,57÷099,47
049,47÷039,47
070,0÷050,0
B
010,57÷000,57059,47÷049,47
C 020,57÷010,57
069,47÷059,47
Piston, disassembly and inspection
Remove the stop rings and remove the pin, see fig. 101.
Remove the piston rings and clean the slot.
Measure diameter Q at height A from the base of skirt (A = 9 mm).
If the diameter is worn more than the 0.05 mm minimum given
value, replace piston and rings.
Note: The provided oversize elements are of 0.50 mm and 1.00 mm
Piston, class
The pistons are subdivided according to their diameters into categories: A, B, C. These references, are shown on the top of
the piston (see fig. 100).
Piston supply:
Pistons at the nominal diameter are only supplied in category A.
Pistons oversized by 0.50 and 1.00 mm are supplied with reference to the increased level on the piston crown:
Ø 72.5 - Ø 73 for LDW 502-602-906-1204-1204/T engines and Ø 75.5 – 76.0 for LDW 702-1003-1404 engines.
Class Ø Cylinder - mm Ø Piston - mm Clearance - mm
Class Ø Cylinder - mm Ø Piston - mm Clearance - mm
Disassembly / Reassembly
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