Triumph 1978 - To Adjust the Chains; Primary Chain; Rear Chain

TO ADJUST THE CHAINS
Primary chain
The primary chain is of the Triplex type. Provision for the take-up of wear
in the primary chain is made by means of a rubber-faced slipper blade
below the bottom run of the chain. The free movement
in the chain can be
felt with a
fi nger after remo vi ng the top inspection plug. Do not move the
chain by using the starter pedal
wh i le yo ur finger is ins id e the case. The
correct chain adjustment is
V2in (1. 2cm) free movemen t. To reduce the
amou nt of slack
re move th e left side silencer an d the pl ug wi th the
extended head from the bottom of the case and tighten the slotted
adjuster
nu t at the re ar end of the tensioner by using t he sho rt screw-
driver No.
03961. After replacing the p lu g, replenish the chaincase with
approximately
V4 pint (150c.c.) of oi l as used in the m ain oil reservoir.
Rear chain
The adju st ment of the rear ch ai n is co ntrolled by draw bolts fitted to each
end of the rear wheel spindle. The correct adjustment for the rear
ch ain is
3/
4
in (1.8cm) free movement with the machine on its wheels an d the chain
at i
ts tightest point of PI" in (4.3cm) with the machine on th e stand and the
ch ain at its slackest paint. If the adjustme nt of the ch ai n is outside these
limits it should be corrected by loosening the wheel spindle nut and then
adjusting the draw bolts
an equal number of turns.
Recheck the chain adjustment.
If the wheel alig nm ent was corre ct
originally the adjustment of the nuts by an equal number of turns should
preserve that alignment but
if you are doubtful whether the rear wheel is
in
li ne then you should use a straight edge or pi ece of st rin g al ongside the
re ar wheel, making allowance for the difference in section between the
re ar tire and the front tire and then tighten or loosen th e draw bo lt adjuster
on the right side so that the rear wheel lines up with the front wheel.
If the
rear wheel is not in line the road holding at the machine
will be adversely
affected and the effect on the rear chain
an d re ar wheel sprocket will
cause rapid wear. When the adjustment is satisfactory check the
tightness of the wheel spind'ie nut and adjuster draw bolts.
There is no automatic oil feed to the rear chain, therefore the
chain must
be lubricated manually with
an oil gun, weekly.
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