Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 300

PIPER CHEROKEE WARRIOR SERVICE MANUAL
9-1. INTRODUCTION.
The fuel system components covered in this section consist of the fuel tanks, selector valves, filter
screens and fuel pump. Instructions are given for remedying difficulties which may arise in the normal
o p e r ation of the fuel system. The instructions are organized so the mechanic can refer to: Removal, Repair,
Installation and Adjustment of each part of the system.
Maintenance for carburetion and fuel injection may be found under Power Plant, Section VIII.
9-2. DESCRIPTION.
a. PA-28-151, Warrior and PA-28-161. Warrior II. (Refer to Figure 9-1.)
The PA-28-151, Warrior and PA-28-161, Warrior II airplanes are equipped with aluminum fuel
tanks consisting of one in the inboard leading edge section of each wing. Each tank has a capacity of 25 gal-
lons, of which 24 gallons are usable.
To provide an even fuel flow, each fuel tank on the PA-28-151, s/n's 28-7415001 thru 28-7515449,
has two outlets, one forward and one aft. Strainers are installed on each outlet. Fuel is pumped through the
forward and aft outlets to fuel manifolds in the inboard section of either wing. Each manifold is a small col-
lector with an inlet hose from each tank outlet, and an outlet hose to the fuel selector valve located on the left
side of the cabin in front of the pilot's seat.
Only one outlet is required to obtain an even fuel flow on the PA-28-151, Wa r r i o r, s/n's 28-
7615001 thru 28-7715314, and on all PA-28-161, Warrior II airplanes. A strainer is installed in the fuel outlet
of each tank. A fuel line is routed from the tank outlet through the wings to the fuel selector valve located on
the left side of the cabin in front of the pilot's seat.
Fuel is then routed from the fuel selector valve to the fuel strainer bowl mounted on the left
f o rward face of the firewall. From the strainer bowl a fuel line is routed to the electric fuel pump, the engine
driven fuel pump, and then to the carburetor and fuel inlet port.
Two electrical fuel quantity gauges are mounted within the instrument cluster of the PA-28-151
and PA-28-161, s/n's 28-7716001 thru 28-8616057, and 2816001 thru 2816109. Each gauge is connected to a
transmitter unit installed in the fuel tanks.
b. PA-28-161, Warrior III. (Refer to Figure 9-2.)
PA-28-161, Warrior III airplanes are equipped with aluminum fuel tanks consisting of one in the
inboard leading edge section of each wing. Each tank has a capacity of 25 gallons, of which 24 gallons are
usable. A strainer is installed in the fuel outlet of each tank. A fuel line is routed from the tank outlet through
the wings to the fuel selector valve located on the left side of the cabin in front of the pilot's seat. (Refer to
Figure 9-2.) A line from the fuel selector valve leads to the fuel strainer bowl mounted on the left forward
face of the firewall. From the strainer bowl a fuel line is routed to the electric fuel pump, the engine driven
fuel pump, and then to the carburetor and fuel inlet port.
The electric fuel pump is installed on the left forward side of the firewall. The outlet port on the
pump is equipped with a tee. One side of the tee is routed through the engine driven pump to the carburetor
The other side of the tee is routed through the primer solenoid valve (clamped to the left side engine mount) to
cylinders 1, 2, and 4. In the event of engine driven fuel pump failure, the electric fuel pump can be activated
continuously by an ON-OFF rocker type FUEL PUMP switch located in the switch panel
The electric fuel primer system may be used for cold engine start. A push ON, spring loaded OFF
primer (PRIME) switch, located just above the magneto/ignition switch on the instrument panel, is used to
activate the system. When pushed and held in, the switch activates a relay, which bypasses the FUEL PUMP
switch, and operates the electric fuel pump. At the same time, a solenoid valve is opened electrically, permitting
liquid fuel to be pumped directly to cylinders 1, 2, and 4.
Revised: February 28, 1995
SECTION IX
FUEL SYSTEM
2A12
Island Enterprises
FUEL SYSTEM