Piper Comanche PA-24 Service Manual page 817

PIPER COMANCHE SERVICE MANUAL
1 I-S7 Fud Pressure Gaul'"
11-58 Gmmll. The fuel pressure gauge instrUment
is
mounted in the cluster
Oft
the instrUment panel. ThIS
gauge
is
connected to the fuel system
at
the engine dnven fuel pum!J. on the PA·24-1SO. whtle on the
PA-240-2.50. PA·24-260 a.nd PA·Z4-400 it is connected
at
the carburetor or injector fuel inlet fimng.
11-59 Removal And ReplaeemenL Refer m Pangnph 11·20 of this ""coon.
11-60. TroublnhooOnI.
Trouble
No fuel pressure indi-
cation.
Pressure low or pressu re
surges.
~eedle fluctUation.
INSTRUMENTS
ISSUED: 8/18172
TABLE XI-XI. FUEL PRESSURE GAUGE
CaIUC Remedy
Fuel valve stUck.. Check valve.
No fuel
In
tanks. Cheek fuel. fill.
Defective fu.1 pump. Cheek pump for pressure
build up. Cheek diaphragm
and relief valves in en-
gine pump. Check for ob-
struction in electric pump.
Check bypass valve. Air
leak in intake lines.
Defective puge Replace gauge.
ObstTUcnon in inlct side
Trace lines and loc:a.tc
of pump. obsm.u:non.
Faulty bypass valve. Replace.
Faultv diaphragm. Replaee or rebuild pump
Surge dome on pump filled Remove and empty.
wir..'
fuel.
3
814