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Crankshaft
9.
Align the connecting rod to the crankshaft and fit the
big end cap. Tighten the NEW cap bolts as follows:
The torque characteristics of the connecting rod bolts
are sensitive to the rate at which they are tightened. If all
the torque is applied in one action, the bolts will be
stretched beyond their yield point. This may cause bolt
breakage resulting in engine damage, loss of motorcycle
control and an accident.
Lubricate the under-head and thread areas of the bolts
with undiluted molybdenum disulphide grease. Tighten
the bolts, in two stages as follows:-
cbxt
a)
Tighten to
14 Nm.
b)
Tighten through 120
0
of bolt rotation as
measured using the Triumph torque turn
gauge 3880105-T0301.
SelVice Tool 3880105-T0301
10. Refit the cylinder head (see page 3-21>.
11. Assemble the crankcases (see page
5-8).
12. Refit engine to frame (see page
to-5>.
Connecting Rod Big End Bearing
Selection/Crankpin Wear Check
1.
Measure the bearing and crankpin clearance as
follows.
Note:
•
The crankpin clearances are measured using
'Plastigage' <Triumph part number 3880150-
T0301). Do not turn the connecting rod and
crankshaft during the clearance measurement
as this will damage the 'Plastigage'.
2.
Remove the big end cap from the journal to be
checked.
3.
Wipe the exposed areas of the crankpin, and the
bearing face inside the cap.
4.
Apply a thin smear of grease to the journal and a
small quantity of silicone release agent to the
bearing.
5.
Trim a length of the Plastigage to fit across the
journal. Fit the strip to the journal using the grease to
hold the Plastigage in place.
6.
Lubricate the threads of the bolt and under-head
area with undiluted molybdenum disulphide grease.
Refit the bearing and cap and tighten the big end
bolts as described earlier.
Z
Release the bolts and remove the cap being
measured. Using the gauge provided with the
Plastigage kit, measure the width of the compressed
Plastigage.
Checking the Measured Clearance
Con rod big end bearing/crankpin clearance
Standard
0.065 - 0.035 mm
Service Limit
0.100 mm
5.14
SelVice Manual- Rocket
1111
Classic
1
Touring
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