Emission
Control
Systems-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
(6)
and
(11)
must be renewed every
50,000
miles.
canisters
Fig.
1 To remove the secondary canister. Disconnect the two outer vent pipes (1) and
the central vent pipe (2) from the top of the canister. Disconnect the running-on
control hose (3) from its connection on the canister. Remove the securing bracket
nut and bolt (4) and the running-on control valve bracket nut and bolt (5) and
remove the secondary canister (6).
To .prevent the engine running on after the ignition has been switched off, a
control valve is fitted to the air vent pipe of the secondary adsorption canister.
The valve is a self-contained unit
and
requires no regular maintenance. Care
should be taken when renewing the secondary adsorption canister not to disturb
the valve or its connections.
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 line.
Figs.
3
and
4
Examine the orifice of the primary canister retrictor (4), the carburetter restrictor
(5)
and
the vapour line restrictor (6) for
obst~uct
ion
.
Clear any dirt or deposit
from the restric
tor
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 carr ied out by your aut horized Austin
rec irc ulat io n
MG
Dealer.
valve
Fig.
4
II
Fig .
3
ig. 4
.&"'1
/
~
I
~,.
~~
\
~
\ ,
~/
_
belt tension.
Du
NO~
0
.E
rl(JHlE~.
"
'-
\
,
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.
Air
pump
Drive belt tension. When correctly tensioned, a total deflection of
t in
(13 rom)
Fig.2
under moderate
hand
pressure, should be possible at the midway point of the
belt run.
Refitting. When refitting, ensure
that
all connections to the primary and secondary
canisters are secure.
NOTE:
Transfer the restrictor in the primary canister outlet pipe (7) to the new
canister.
To remove the primary canister. Disconnect the purge pipe (7), vapour pipes (8)
and the connecting pipe (9) from their connections on the canister. Remove the
securing bracket nut and bolt
(10)
and remove the primary canister
(11).
Fig.
1
Fig.
1
6
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