Triumph TR6 PI Operation Manual page 72

ENGINE
Removing
1. Isolate the battery.
2. Drain the oil and remove the sump 12.60.44.
3. Release the drive belt tension.
4.
Remove the crankcase front sealing block,
instructions 4 to 8, 12.25.11
5 . Remove the oil pump to enable access to be gained to
the rear centre main bearing, instruction 4, 12.60.26.
6. Dealing with each main bearing in turn, slacken the
two bearing cap bolts.
NOTE: The bearing caps are numbered from 1 to 4,
beginning at the front of the engine and
it
is
important that these are checked before the caps are
removed and mixed.
7. Withdraw the bearing cap with the lower shell.
8. With the tag end leading, slide the upper bearing shell
out from between the crankcase and crankshaft
journal.
MAIN BEARINGS - SET
- Remove and refit
Main bearing - each
Main bearing - front - instructions 1
to 4, 6 to 14 and 16
Main bearings centre and rear - instructions 1
to 3, 5 to 13, 15 and 16
12.21-.39
12.21.40
12.21.41
12.21.42
CAUTION Do not permit the crankshaft to remain
unsupported for longer than is necessary since
compression of the timing cover and rear main oil
seals may cause subsequent leakage.
Refitting
9. Dealing with each main bearing in turn, lubricate and
feed the upper bearing shell - tag end trailing -
between the crankcase bearing bore and the
crankshaft journal. Ensure that the tag locates
properly into the corresponding recess in the
crankcase bore.
10. Select the correct bearing cap - see note following
instruction 6 - and fit the bearing shell ensuring that
the tag locates in the corresponding recess in the cap.
11. Fit the cap to its corresponding journal noting that
the side of the cap containing the shell location recess
is fitted adjacent to the recess in the crankcase
bearing bore Le. opposite side to the camshaft.
12. Using NEW BOLTS tighten evenly to 50 to 65 Ibf ft
(6"9 to 9·0 kgf m).
13. Check and if necessary adjust crankshaft end float
12.21.26.
14. Refit the crankcase front sealing block - instructions
9 to 16,12.25.11
15. Refit the oil pump.
16. Reverse instructions 1 to 3, ensuring that the sump is
filled with new oil to the high mark on the dipstick.
NT2 537
12.21.39
12.21.42
Triumph TR6 Manual. Part No. 545277 Issue I