Triumph Tigress TW2 Service Sheet Download

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SERVICE SHEET No.

1005

(contd.)

We now come to one of the bearings which requires special mention ; this is the gearbox mainshaft and

pinion sleeve bearing which is a special sealed bearing, the seal being outwards, and the rear swinging arm
bearing plate must be refitted before this bearing can be inserted through the gearbox.

Refit the swinging arm bearing plate, which is secured by the four hexagon headed bolts and two

locking   plates,   turn   the   locking   plates   up   on   to   all   four   bolts   after   final   tightening,   press   the   sealed
bearing in, seal side first, through the gearbox, making sure that it seats right home against the swinging arm
plate. Now press the pinion sleeve through the gearbox and into the bearing and make sure that  it is right
home, otherwise when the gearbox cluster is assembled it may tighten up. After pressing the  pinion sleeve
right home insert the distance piece over the outside of the pinion sleeve and into the rear  swinging arm
bearing plate.

Apply clean engine oil to the crankshaft timing side bearing and insert the crankshaft from the left

hand side, making sure that it is absolutely clean and free from any traces of grit or dust. Be sure that the
dowel is in position on the timing side to locate the timing gear.

Place the timing gear over the crankshaft so that the keyway is in line with the dowel and the timing

mark on the pinion is on the outside. In this case there is no tab washer used under the nut, but the nut
has a special register which faces towards the pinion. Using service tool 61-5022 hold the crankshaft

and tighten the nut on the pinion.

Now remove the nut which was placed on the camshaft for the

purpose   of   testing   the   pump,   insert   the   thrust  washer   over   the
camshaft   and   against   the   elongated   brass  plate,   then   refit   the
camshaft pinion with the timing mark  on   the   outside   and   meshed
with the timing mark on the crankshaft pinion. The easiest way to
do this is to mesh the camshaft gear with the crankshaft gear and
then   to   turn   the   camshaft   gently   to   line   its   keyway   up   with   the
keyway in  the pinion. When both are in line gently tap the pinion
home,  place  the   tab  washer  in  position  so  that  the  centre  key or
tab   is   in   the   keyway   on   the   shaft,   screw   on   the   nut  and   tighten,
finally   turning   over   the   tab   washer   on   to   one  of   the   flats   on   the
nut.

It will be assumed that the carbon has been removed from

the pistons, that the rings have been checked for gap, and that the
pistons have been replaced on their connecting rods the correct
way round according to the markings placed inside the skirt when
dismantling.

Apply a coating of clean engine oil to the piston skirt and

rings and to the crank journals, remove the cap from one of the
rods,   placing   the   cap   and   the   nuts   in   such   a   position   as   to
facilitate   assembly   and   ensure   correct   mating   of   cap,bolts   and
nuts   as   mentioned   in   Service   Sheet   No.   1004   dealing   with
dismantling.   With   service   tool  61-5004   compress   the   rings   on
the   piston,   having   first   positioned   the   ring   gaps   equidistant
round the piston. Lubricate the cylinder wall and insert the big
end   of   the   connecting   rod   down   through   the  cylinder,   being
careful not to scratch the cylinder bore, slide the piston into the
bore and at the same  time direct the big end over the crankshaft.
When the big end of the connecting rod is in position replace the
cap   ensuring   that   the   numbers   on   the   cap   mate   up   with   the
numbers on the rod, place new special tab washers over the bolts
and screw on the nuts until they grip the tab washers, then turn
down the

Fig. 15. Timing pinions.