Sender/Fuel Quantity Gauge Tolerances; Fuel Gauge View - Piper PA-44-180 SEMINOLE Maintenance Manual

3. With the master switch in the "OFF" position, 14 ± .2 volts D.C. applied to system, fuel selector valves in
the "ON" position, and no fuel in the tanks, the gauge needle should be centered on the white dot to the left
of the "O" radial mark, with a maximum deviation of 1/2 needle width. If not within this tolerance the
guage should be replaced.
4. Add fuel to the tanks in accordance with the information given in Chart 2802, until tanks are full. Observe
the gauge reading at each 10 gallon increment. To reduce internal gauge friction tap the gauge.
5. With the tanks full the needle should be centered on the "F" radial mark within ±1 needle width. If not
within this tolerance adjust (refer to Figure 28-6), just sufficiently to bring it within tolerance - do not center
the needle.
CHART 2802. SENDER/FUEL QUANTITY GAUGE TOLERANCES
FUEL QUANTITY
ADDED
(GALLONS)
1.5*
21.5
41.5
FULL
*Includes 0.5 gallons to fill lines, gascolalor and carburetor.
EMPTY DOT
0 10 20 40 F
LEFT FUEL
U.S.
EMPTY
DOT
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
SENDER
RESISTANCE
(OHMS)(REF.)
9
54
84
95
ELECTRICAL
ADJUSTMENT
ACCESS HOLE
0 10 20 40 F
LEFT FUEL
GALS
U.S.
Figure 28-6. Fuel Gauge
GAUGE
INDICATION
0
20
40
F
GRADUATION
DOT MECH ZERO
0 GALS
10 GALS
20 GALS
40 GALS
F
G
SEND
GALS
2B15
TOLERANCE
(NEEDLE WIDTHS)
-1/2
±1
±1
±1
IN POINTER WIDTHS
CALIBRATION
OHMS DEGREES TOLERANCE
-39° —1/2
9 -30° -1, +0
37 -7° ±1
54 +8° ±1
84 +26° ±1
95 +30° +1, -1/2
N
INSTALLED ON
PA-44-180
(S/N 44-95001
AND UP)
IGN
14 V
2 8 - 4 1 - 0 1
Page 28-20
Revised: May 15, 1989