Crankcases; Removal; Disassembly - Triumph Thunderbird Service Manual

Crankcases
The following procedures often require lifting of heavy
components. To avoid injury, always lift heavy
components with a hoist or block and tackle and never
attempt to manually lift items that are too heavy. Injury
may result from failure to use the correct lifting
equipment.
The upper and lower crankcases are machined as a
matched set and must never be assembled to
non-matching halves. Doing so will cause seizure of the
engine.
Note:
• The crankcase halves may be separated with
the cylinder head fitted.
• If the crankshaft main bearing shells are
removed from the crankcase, remove and
collect the three loose-fitting piston cooling jets
from the upper crankcase.
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1. Main bearing housing
2. Oil gallery
3. Piston cooling jet
If the big end bolts have been loosened or removed, new
bolts must be installed.
During crankcase assembly, ensure the two piston
cooling jets are re-installeu If the piston cooling jets are
omitted, oil pressure will be reduced. Running the
engine with low oil pressure will cause severe engine
damage.
Removal
1.
Remove the engine from the frame (see page 9-2).
2. Remove the clutch (see page 4-8>.
3. Remove the alternator (see page 18-16>.
4. Remove the oil pump drive and oil pump (see page
8-1n.
5. Remove the torque compensator (see page 5.20>.
6. Remove the sump (see page 8-10).
Z Remove the water pump (see page 11-7).
8. Remove the gear position sensor (see page 10-101).
Disassembly
1. Remove the output shaft bearing retainer plate.
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1. Bearing retainer plate
2. Fixings
3. Remove the oil filter (see page 8-7).
4. Remove the fixings and remove both control plate
mounting brackets from the crankcase.
SA
Service Manual - Thunderbird