Westerbeke W-46 - Page 26

INSPECTION/REPAIR
b. To check the rod for twist,
measure f as shown in figure
b. If· the measurement at c
1s greater than o. osmm per
lOOmm (0.00197in. per
3.937in.) of ,e_, correct the
rod. -
4. To check the rod with a piston,
place the rod on the sur face
plate as shown below, insert a
round bar of the crankpin
diameter into and through its
large end bore and take
measurements at A and B. The
difference between the two
measurements tells the straight-
ness of the rod.
When one or more connecting
rods are to be replaced, select
new rods so that the variance
in weight among the rods is
within the value given in the
specification.
Specification
Unit: gram (oz)
Variance in weight
among connecting rods
s. Check the connecting rod end
play as follows:
Tighten · the capscrews to
S.Skg-m (39.8 lb-ft). Use a
feeler. Gauge to measure the
end play end play (the
clearance between the large end
and crank arm) • If the
clearance measured exceeds the
service limit, replace the con-
necting rod or bearing.
Specifications
Unit: mm (in.)
Item
Standard
Service
limit
Connecting rod
0.15-0.35
0.50
end play
(0.0059- 0.0138)
(0.0197)
Checking connecting rod on surface plate
Engines &'Generators
24