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Bearings
15.
Inspect the porous bronze bearing bushes for wear.
16.
If necessary renew either bush as follows:
Extract the fixing bracket bush using a suitable press
and mandrel. Extract the commutator end bracket
bush using a suitable extractor or by screwing a 9/16
in. tap squarely into the bush and withdrawing.
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 higWy 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 holders with a petrol
moistened cloth.
18.
Check that the brushes move freely in the holders.
19.
Check the brush spring tension as shown. Brush
spring tension should be as given in Data. Repeat for
the remaining three springs. If the tension is low
renew the spring set.
20.
Check the brush length. Renew the brushes if less
than the length given in Data.
2!.
If necessary, renew the field winding brushes.
Unsolder the flexibles from the field windings.
Position the ends of the new flexibles. Squeeze up
and solder.
22.
If necessary, renew the earth brushes. Unsolder the
flexibles from the clips on the commutator end
bracket. Open the clips and position the ends of the
new flexibles. Squeeze up and solder.
Commutator
23.
Clean 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 diameter given in Data. Do not
undercut insulators between segments.
Triumph TR6 Manual. Part No. 545277 Issue I
ELECTRICAL
II
86.60.13 Sheet 2
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