Cessna 182 1978 - Fuel Quanity Indicating System; Removal and Installation of Transmitter

MODEL
182
& T182
SERIES
SERVICE
MANUAL
15-50. TROUBLE
SHOOTING.
TROUBLE
PROBABLE
CAUSE
REMEDY
GAGE
POINTER
STAYS
OFF
Popped
circuit
breaker.
Reset
breaker.
LOW END
OF SCALE.
Master switch "OFF" or switch Replace defective switch.
defective.
Broken or grounded
leads Repair
or replace defective
between gage and sensing wiring.
unit.
Defective gage
or sensing unit. Replace
gage or sensing unit.
GAGE
POINTER
GOES OFF
Broken
or grounded
lead.
Repair
or replace
defective
wiring.
HIGH
END
OF
SCALE.
Defective gage or sensing
unit. Replace gage or
sensing unit.
GAGE
OPERATES
INTER-
Defective
master
switch,
Replace
switch,
repair
or
MITTENTLY.
broken
or grounded
lead.
replace
defective
wiring.
Defective gage
or sensing unit. Replace
gage or sensing unit.
EXCESSIVE
POINTER
Loose
or broken
lead.
Repair
or replace
defective
OSCILLATION.
wiring.
Defective gage or sensing unit. Replace gage or sensing unit.
Excessive
panel
vibration.
Tighten
panel
mounting
screws.
OBVIOUSLY
INCORRECT
Defective
gage or
sensing
unit.
Replace
gage
or sensing
unit.
TEMPERATURE
READING.
POINTER
FAILS TO GO OFF
Defective master
switch.
Replace switch.
SCALE WITH
CURRENT
OFF.
Defective gage. Replace gage.
15-51. FUEL QUANTITY
INDICATING SYSTEM.
15-53. REMOVAL
AND INSTALLATION
OF TRANS-
MITTER.
(Refer
to
section
12).
15-52. DESCRIPTION. The magnetic type
fuel quan- a. Drain fuel from cell. (Observe
the precautions
tity
indicators are
used in conjunction
with a float-
in Section
12.)
operated
variable-resistance
transmitter in
each fuel b.
Remove wing root
fairing.
cell.
The full position
of float
produced a
minimum
c. Disconnect
electrical
lead
and ground
strap from
resistance through
the transmitter, permitting
maxi- transmitter.
mum current
flow
through the
fuel quantity
indicator
d. Remove
screws
attaching
transmitter
and care-
and maximum pointer
deflection. As fuel level
is fully work
transmitter from cell.
DO NOT BEND
lowered,
resistance in the transmitter
is increased, FLOAT
ARM.
producing a decreased current flow through
the fuel e. Install transmitter by reversing
preceding steps,
quantity indicator and a smaller
pointer deflection, using new gaskets
around opening in fuel cell and
under
screw heads.
Be sure
to tighten
screws
even-
ly to ensure
bottom
of float
is approximately
. 20
in.
from bottom of fuel cell.
f. Service fuel tanks. Check for leaks and correct
quanity indication.
15-22