
SERVICE MANUAL & ICA
8750 AMPHIBIAN/SEAPLANE FLOATS ON CESSNA 208/208B
P/N 1005723 Doc. No. W8750-24-01
Page 98 of 104
Revision IR
Correctiv
e Acti
on
a.
R
es
et circuit brea
ker
b.
Jump a
cro
ss p
ressure swi
tch lead
s to determine
if
m
otor
runs
. I
f m
ot
or
op
era
tes r
epla
ce the sole
noid
sw
itch.
c.
Jump a
cro
ss solen
oid l
ead
s and
dete
rmine if mo
tor
runs. If mo
tor o
pera
tes repl
ace
solenoi
d pre
ssure
Swi
tch
.
d.
C
orre
ct mo
tor
grou
nd.
e.
R
epla
ce
faul
ty p
ump motor
.
a.
R
epla
ce
pre
ssu
re switch
.
b.
C
lean
or
repla
ce
rel
ief val
ve
as requ
ire
d.
a.
R
epair
gear
a
ctuator.
b.
R
epla
ce
faul
ty p
ressure
relie
f val
ve
.
a.
V
isuall
y inspect line
s, a
ctua
tor
s and
h
ose
s and
replace
a
s r
equired
.
b.
D
iscon
nect and ca
p off
on actua
tor at a time
and
isola
te the
in
ternall
y le
akin
g a
ctuato
r b
y p
roce
ss o
f
elimination
. If al
l th
e actua
tor
s have
b
een i
sola
tes and
the pump cy
cl
ing c
ont
inues,
r
eplac
e t
he
pow
er
pack
ch
ec
k
valv
e.
a.
Insp
ect for
free ope
rati
on
of the retr
acti
on uni
t.
Suspe
ct the gear
th
at r
etra
cts la
st.
b.
R
epla
ce
pre
ssu
re switch
.
a.
C
le
an
int
ak
e s
cr
een
loc
at
ed
ins
id
e
re
se
rv
oi
r
ta
nk.
b.
C
onne
ct a
24
V
D
C power
sour
ce di
rectly to
the
pump
.
If pump
opera
tion
im
prov
es
corre
ct wir
ing.
c.
R
epla
ce
pump mo
tor.
d.
R
epla
ce
pump.
a.
C
orre
ct wiring
and
prote
ct terminal
s wi
th g
rease.
b.
R
epla
ce
pump mo
tor.
c.
R
epla
ce
cir
cui
t bre
aker
.
a.
R
es
et circuit brea
ker.
b.
R
epla
ce
annun
cia
tor test switch
.
Poten
tial Ca
u
se
(s)
a.
C
ircuit bre
aker
is o
pen (
trigger
ed).
b.
P
ress
ure
sw
itc
h
is not
act
uat
ing
at
the
low
pres
sure
tr
ip po
int
.
c.
S
olenoid
swi
tch
no
t actua
ting
.
d.
F
aulty grou
nd on
p
ump.
e.
F
aulty pump
motor
.
a.
F
aulty pre
ssure
swi
tch
.
b.
F
aulty or
dir
ty pre
ssure
relie
f val
ve
allow
ing
ins
uf
fic
ient
pre
ss
ure t
o
sa
tis
fy s
witc
h.
a.
B
inding or jammed
gear a
ctuato
r.
b.
F
aulty pre
ssure
reli
ef val
ve
.
a.
E
xternal
hydrauli
c l
eak.
b.
Inte
rnal hyd
rauli
c le
ak.
a.
B
inding i
n the
retra
ctio
n uni
t.
b.
P
ress
ure
sw
itc
h c
ut
off
limit
to
o
low.
a.
P
lugged oil screen
.
b.
P
oor ele
ctri
cal con
nection to
motor
.
c.
P
oor mo
tor
.
d.
W
orn pump
gear
s.
a.
D
efecti
ve o
r corrod
ed wire
con
nection
s.
b.
D
efecti
ve mo
tor
bru
she
s.
c.
D
efecti
ve cir
cui
t br
eaker
.
a.
Landing g
ear indi
ca
tion cir
cui
t brea
ker tripped.
b.
A
nnunci
ator
test switch
de
fe
cti
ve
.
Ma
lf
un
ct
io
n
Power
pa
ck doe
s n
ot r
un a
fter gear
sel
ecti
on.
Power
pa
ck doe
no
t shu
t do
w
n
afte
r g
ear rea
ched
de
sire
d
posi
tion.
Power
pa
ck shu
ts o
ff be
fore
gear
rea
ch
es d
esi
red
posi
tion.
Pow
er
pac
k c
yc
les on
and
off
after
gea
r is in
po
sition.
Power
pa
ck cycle
s on and
o
ff
during
gear c
yc
le.
Slow gear
re
tra
ctio
n (
consider
abl
y lon
ger than
30 se
cond
s).
Cir
cuit bre
aker
pop
s du
ring
cycle.
Landing g
ear posi
tion indi
ca
tor
s do
no
t te
st.