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2
3
456
Fig
.
2-85.
Consta
nt
a ir temperature device flop
1.
Th
e
rmostat
5.
Flap
2.
Lock
6.
Hot
a ir
intake
3.
Air cleaner
co
nn
ect ion
7.
Co
ld
air
inla
ke
4. Flap co
nI
ro
i
FLAP HOUSING FOR CONSTANT AIR
TEMPERATURE OEVICE
7
VOLVO
1038 17
If
the
flap
(5,
Fig
.
2-85)
doe'
s
not
open,
th
ere
will
be
too high
a temperoture for the
intake air and this
wiH
have
a negative
effect
on
t
he
eng
ine.
The
flap
shou1
ld be
clo~ed
for cold air at a tempera-
ture
of
70-77°
F
and
for warm
air at
95-
105
°
F. If
correot function
is notobtO'ine,d, replace
the flap
hous'ing
with the
thermosta
t
complete.
The flaplocation
can
be
checked
wi.th the flap hou
s-
ing fitted in position.
A small
tab on the flap
spindle
projeots from both sides of
the
housing
(see 3,
Fig
.
2-119).
The 10n9'itudina
'
l
pin for these tabs coincide
with -that of the
spindle and rturns
parailei with the
spindie
.
In other words,
,the
location of the flap
can
be seen
at
different temperatures by
compa,
r ing
the
angle
of a tab in
rela,
t ion
to
the
stops
outside
the
housing.
The thermostat
can
he
checked
in lukewarm
wate,r.
The
flap
should
be closed for
cold air at
70-
80
0
F
and
closed
for
hot
air at
95-105°
F.
If
correct
func-
tion is not obtained, change
:the
flap housing with
thermostat
complete.
When fitting
the
flap housing, observe tha.t
the
ther-
mostat is 'Iocated in the centre of the
air
flow
and
the
tightening
screw
for the hose clamp is on the upper
side of
the
flap housing.
AIR
CLEANER
The inseTt shoul,d be ,replaced with a new one
every
40,000
km
(25,000
miles), if the vehiole is driven in
areas with modelrate air pollution. With drivi'llg in
very dust y areas, replacement
may
have
to
be
done
more often
.
2:
38
Fig. 2-86.
Checki ng
the flop
function
1.
Co ld-air
intake
2.
Flap spind
le
3.
Tab
4.
Flap
5.
Stop
for
mark
in
g flap position at temp. below
58-77
°
F
6.
Stop
for
markr
in
g flap pos
ition
at
te
mp
.
above 95--104
°
7.
Hol
a
ir
inlake
N/i
cleanin
g -of any
type should
be carried out bet-
we,en the
replacements.
The
insert on no
cond
ition
must
be
morstelned
or oi,led.
Increased fuel
consumption is a sign of a blocked air
cleaner.
FUEL
PUMP
Cleaning
the strainer
When cleaning
the ,fu'el
strainer, unscrew
the plug
(12,
Fig.
2-68).
Checking
condition
of fuel
pump
Before
re
moving
the fuel pump, check
,its
condition
with
a fuel pressu're gauge.
Co
nnect a
pressure gauge
and
run
the engine
until the
pressure
no longer ri
ses.
Stop
the
engine, ohed<
the
pressu'r'
e and aompare
with
the values given
in "Specifications". Check also the
pressure
drop after
the engine has
stopped. If the
pressure drops, this is
a sign
that the valves leak
or
aleaking
float
va'lve.
Removing
Disconnect
the
connections for the
fuel
lines and
screw
off the pump
.
Dismantling
l.
Screw
out the
plug
(3,
Fig.
2-87)
with
st'miner.
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