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6
Disassembly / Reassembly
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KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_ rev. 00
CONNECTING ROD
Caution – Warning
While reassembling the big end bearings, we suggest
cleaning all parts thoroughly, as well as proper greasing in
order to avoid risks of seizure at the first start.
Big end bearing
After connecting rod from crankshaft disconnection, check the
following.
While reassembling, be sure the two centring notches A an B
are on the same side.
Tighten the connecting rod big end cap screws simultaneously
at a torque of 40 Nm.
Note: The big end bearing is supplied both at the nominal value
and undersized by 0.25 and 0.50 mm.
Connecting tod, weight
Important
Weigh connecting rods when replacing them in order to avoid
unbalance.
The difference in weight should not exceed 10 g.
The difference in weight of the pre-assembled connecting rod,
piston and pin must not exceed 14 g.
Connecting rod with bearings and pin
Dimensions (mm):
A = 126,48÷126,52 ...... (for KDW 702-1003-1404)
B = 20,015÷20,025 ...... (for KDW 702-1003-1404)
C = 40,021÷40,050 ...... (bearing tightened at 40 Nm)
D = 19,996÷20,000 ...... (for KDW 702-1003-1404)
E = 54,000÷55,100 ...... (for KDW 702-1003-1404)
(B-D) = 0,015÷0,039
(B-D) limit value = 0,060
Nota: When driving the small end bearing make sure both
oilholes are aligned.
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