Triumph TR6 PI Operation Manual page 500

Bearings
15. Inspect the porous bronze bearing bushes for wear.
16. If necessary, renew either bush as follows:
Extract the bush, using a suitable press and mandrel.
Prepare the porous bronze bush by immersing it in
thin engine oil for 24 hours or thin engine oil heated
to 100°C for two hours. Fit the bush, using a suitable
press and a highly polished, shouldered mandrel of
the appropriate dimension given in Data. Do not ream
the bush after fitting or its porosity may be impaired.
Brushes
17. Clean the brushes and brush box with a
petrol-moistened cloth.
18. Check that the brushes move freely in the brush box.
19. Check the brush spring pressure as shown. Position a
new brush so that the top protrudes 0'060 in (1'50
mm) above the brush box. Brush spring pressure
should be as given in Data. Repeat for the remaining
three springs. If the pressure is low, renew the
commutator end bracket assembly.
20. Check the brush length. Renew the brushes if less
than the length given in Data.
21. If necessary, renew the commutator end cover
brushes. Brushes are supplied attached to a new
connector link. Withdraw two brushes from the brush
box. Withdraw the connector link. Position new
brushes as shown. Retain the longer flexible under
the flap.
22. If necessary, renew the field winding brushes. Brushes
are supplied attached to a common flexible. Cut the
old flexibles 0'250 in (6 mm) from the joint. Solder
the new flexible to the ends of the old flexible. Do
not attempt to solder direct to the field winding strip
as the strip may be produced from aluminimum.
Commutator
23. Oean the commutator with a petrol-moistened cloth.
If the commutator is in good condition it will be
smooth and free from pits or burned spots.
24. If necessary, polish the commutator with fine
glass-paper.
25.
If necessary, skim the commutator. Separate the
armature from the roller clutch drive by performing
86.60.07. Mount the armature in a lathe and rotate at
high speed. Using a very sharp tool, take a light cut.
Polish with fine glass-paper.
Do
not cut below the
minimum skimming thickness given in Data. Do not
undercut insulators between segments.
Triumph TR6 Manual. Part No. 545277 Issue 1
ELECTRICAL
86.60.13 Sheet 6