Emission
Control
Systems-except
California
MAINTENANCE
OPERATIONS
All items
marked
* in the
'MAINTENANCE
SUMMARY'
given on pages 76
to 82 are emission control related.
Adsorption
The charcoal adsorption canisters (5) and (10) must be renewed every 50,000 miles.
canisters
Fig. 1 To remove the secondary canister. "Disconnect two
outer
vent pipes (1) and the
c:ntral
vent pipe (2) from.the top
of
the canister. Disconnect the inter-connecting
pipe (3) from Its connection on the canister. Remove the securing bracket
nut
and bolt (4) and remove the secondary canister (5).
To
~~move
the
pri~ary.
canister. Disconnect the purge pipe (6),
vapour
pipes (7)
and
inter-connectmg
pipe
(8) from their connections in the canister. Remove the
securing
nut
and
bolt (9) and remove the primary canister (10).
NOTE:
Transfer the restrictor in the primary canister outlet pipe (6) to the
new canister.
Refltting.
When
refitting, ensure
that
all connections to the secondary
and
primary
canisters are secure.
Air
pump
Drive belt tension.
When
correctly tensioned, a total deflection of t in (13 mm)
Fig. 2
under
moderate
hand
pressure, should be possible at the midway point
of
the
belt run.
Adjusting. Slacken the securing bolt
(1)
and
the two adjusting link bolts (2),
move the air
pump
to the required position. Tighten the bolts
and
re-check the
belt tension.
DO
NOT
OVERTIGHTEN.
Purge
and
To check, disconnect the purge line (1) from the primary
adsorption
canister,
vapour
line
and
the purge line (2) from the carburetter, also disconnect the hose (3) from the
restrictors
vapour
pipe.
Figs. 3
and
4
Examine the orifice of the primary canister restrictor (4), the carburetter
restrictor (5)
and
the
vapour
line restrictor (6) for obstruction. Clear any dirt
or deposit from a restrictor orifice, using a length of wire.
WARNING:
DO
NOT
use air pressure to clear any dirt.
Exhaust
gas
Servicing the
E.G
.R. valve (7) should be carried
out
by your authorized Austin
recirculation
MG
Dealer.
valve
Fig. 4
Fig. 3
Fig. 1
Fig. 4
II
\~./7
~
,
""
\
~
I
~
tj
J BN01 46
Fig. 1
5
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