CRANKSHAFT AND MAIN BEARINGSH.4
3.
Clean the bearing housings and place the top half
bearings in position. Liberally oil the bearings with
clean oil.
4.
Place the crankshaft in position.
5.
Oil the two upper thrust washer halves and slide
them into the recesses provided on either side of
the center main bearing housing.
6.
Fit the lower halves of the main hearings to the
hearing caps. Oil the hearings and place the caps
in their respective positions ensuring that the lower
halves
of
the
thrust
washers
are
correctly
positioned on either side of the center main bearing
cap. When replacing the main bearing caps,
ensure that they are fitted in their respective
positions, also that they are fitted the correct way
round. The caps are numbered, No. I commencing
at the front of the engine. Each cap is also marked
with a serial number as stamped on the cylinder
block bottom face. These should read in line (See
Fig. H.3).
7.
Examine main bearing setscrews for damage of
threads, etc., replace where necessary. It is no
longer necessary to fit tab washers to main bearing
setscrews.
8.
Evenly tighten the main hearing setscrews to a
torque wrench setting as given on Page B.1.
9.
Check the crankshaft end float to ensure that a
clearance of 0.002/0.015 in (0,05/0,38 mm) exists.
Oversize thrust washers may be fitted (see Fig.
H.5)
10.
Refit the connecting rod caps and big end bearings
(See Page F.4).
11.
Refit the rear main bearing bridge piece to the
cylinder block together with new joints and sealing
rubbers (see Fig. H.6). Ensure that the rear face of
the bridge piece is in alignment with the rear face of
the cylinder block (see Fig. H.7).
12.
Fit new sealing strips to the rear main bearing oil
seal housings and refit the hous-
Fig. H.5
Checking the Crankshaft End Float.
ings as described in Rope Type Crankshaft Rear
End Oil Seal. With lip type seals, refit oil seal
housing as described in Lip Type Crankshaft Rear
End Oil Seal.
13.
Refit and correctly align tile flywheel housing as
described on Page P.3. Refit the flywheel and
starter motor.
14.
Refit the oil pump, timing case and timing gears
(see Page L.5 and K.,3)
15.
Refit the sump, sump strainer and the oil pump
suction and delivery pipes.
ROPE TYPE CRANKSHAFT REAR END
OIL SEAL
The housing consists of two halves bolted around the
rear of the crankshaft which has a shallow spiral oil
return groove machined in it to a depth of 0.004/0.008 in
(0,10/0.20 mm). The bore of the housing is machined to
accommodate a rubber cored asbestos strip. The strip
consists of two sections, one for each half of the oil seal
housing.
When fitting the seal the following procedure should be
adopted:
1.
Set up a half housing in the vice with the seal
recess uppermost.