Westerbeke 8.0KW-60Hz Service Manual page 33

ENGINE-DISASSEMBLY, INSPECTION AND ASSEMBLY
CONNECnNG ROD CAP INSTALLAnON
1. Align the marks made during disassembly and fit the
bearing cap onto the connecting rod. If the connecting rod
is
new and has no index mark, ensure that the bearing
locking notches are both on the sarne side.
2. Check that the connecting rod big end side clearance
conforms with the specifications.
STANDARD VALUE 0.10· 0.25mm (.00394· .00985In)
LIMIT 0.4mm (.015In)
CONNECTING ROD CAP NUT INSTALLATION
A
CAUTION:
Tom the CIInnecting IIId cap nuts with
the
cylinder heaJlln place,
11m
1'fH1I0ve the spade
plugs.
1. The connecting rod bolts and nut utilize the plastic
region tightening method. the bolts must therefore be
checked for stretching before reuse. To check a bolt for
stretching, screw the nut down the entire length of the
thread
by hand. Unless the nut turns smoothly all the
way, the bolts threaded section is stretched and the bolt
must be replaced.
2. Before fitting the nuts, apply engine oil to their threads
and seating surfaces.
3. Fit the nuts onto the bolts and turn them until they are
finger tight. The nuts must then
be
tightened alternately to
ensure the correct fitting of the cap.
4. TIghten the nuts to a torque of 17Nm (12.5 ft-Ib).
!III" -11H1"
\
ALIGNMENT MARK
::=--
~
'-
\
NUT
J BOLT
II
II
;::::=:---
S. Make a paint mark on the top of each nut as shown.
6. Make paint marks on the bolts 90· to 100· clockwise
from the paint marks on the nut.
7. Turn the nuts until their paint marks align with the paint
marks on the bolts.
A
CAUTION:
If the nuts are turned by less than
911', the cap may not be held on with sufficient
strength. If the nuts are turned by more than 101f,
loosen them completely and carry out the
tightenIng procedure again.
1
OIL SEAL
ASSEMBLY
4
BEARINGS
(UPPER)
,
NUMBERS INDICATE
THE SUGGESTED ORDER
OF DISASSEMBLY
APPLY CLEAN OIL TO ALL
. MOVING PARTS WHEN
REASSEMBLING.
CONNECTING ROD BEARING INSTALLATION
The crankshaft oil clearance can be measured easily using a
plastic gauge. To check the crankshaft oil clearance with a
plastic gauge, carry out the following procedul'll:
MAIN BEARING BOLT
TORQUE SPECIFICATIONS
38 FHBS (51 NM)
~
WESTERBEKE
Eng/nes & Generetors
25