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clockwise. Swing wire bail clear of bowl.
(4) Remove the filter element. Andair type- Turn filter assembly counter
clockwise.
ACS type- remove filter disk.
WARNING: DO NOT ALLOW HEAT OR FIRE NEAR FUEL. FUEL BURNS
VIOLENTLY. THIS CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT
(6) Wash the filter element. Use clean fuel.
(7) Clean the inside of the Gascolator bowl.
(8) Install the filter and the Gascolator bowl. Andair Type –Align the arrow on the bowl
with the mark on the housing, rotate
retaining ring counter clockwise.
ACS Type- Place bowl on housing, position
wire bail directly under bowl, finger tighten
knurled nut turning clockwise.
CAUTION: DO NOT OVERTIGHTEN THE KNURLED RETENTION NUT ON THE
WIRE BAIL TYPE GASCOLATOR. SEPARATION OF THE
GASCOLATOR BOWL MAY RESULT.
(9) Open the maintenance shut-off valve.
(10) Examine the Gascolator installation. Look specially for fuel leaks.
CAUTION: LOCK THE MAINTENANCE SHUT-OFF VALVE OPEN WITH WIRE.
IF YOU DO NOT LOCK THE VALVE OPEN IT MAY CLOSE IN
FLIGHT. THIS WOULD CAUSE ENGINE FAILURE.
(14) Lock the maintenance valve open with
lockwire.
(15) Lock the gascolator bowl retaining device. Andair Type- Lockwire the ring to the
Gascolator housing.
ACS type-Lockwire the knurled nut to the
retention bar.
(16) Install the fuel-tank access-panels below the
fuselage.
(17) Bleed the engine fuel system. Refer to Chapter 73-00.
Fuel
DA20-C1 AMM
Page 204
19 Dec 1997 28-20-00 Doc # DA201-C1
Rev. 0
3. Remove/Install the Fuel Shut-Off Valve
A. Remove the Fuel Shut-Off Valve. (Refer to Figure 2)
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Refer to Chapter 24-31.
(2) Remove the fuel-tank access-panel from the
bottom of the fuselage.
(3) Remove the top engine cowling.
(4) Close the maintenance shut-off valve:
− Cut the lock-wire.
WARNING: DO NOT ALLOW HEAT OR FIRE NEAR FUEL. FUEL BURNS
VIOLENTLY. THIS CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT
WARNING: DO NOT GET FUEL ON YOUR SKIN. FUEL CAN CAUSE SKIN
DISEASE.
(5) Drain the fuel lines:
− Open the maintenance taps at the
bottom of the fuselage.
Use a correct fuel container.
(6) Remove the instrument panel. Refer to Chapter 31-10.
(7) Disconnect the shut-off control rod from the
fuel valve lever.
(8) Remove the cover from the fuel valve box. Carefully break the adhesive fuel seal
between the cover and the box
(9) Loosen the nut on the pipe elbow at the
cockpit side of the firewall. Disconnect the
fuel feed hose from the pipe elbow on the
engine side of the firewall.
Put a cap on the fuel hose.
(10) Remove the thru-nut from the firewall.
(11) Remove the shut-off valve from the bulkhead
nut.
− Turn the shut-off valve.
(12) Remove the fuel shut-off valve. Put a cap on the fuel shut-off valve
connections.
DA20-C1 AMM
Fuel
Doc # DA201-C1
Rev. 1 28-20-00 Page 205
24 Mar 1999
B. Install the Fuel Shut-Off Valve
Detail Steps/Work Items Key Items
(1) Remove the two caps from the fuel shut-off
valve. Put the fuel shut-off valve in position
in the airplane.
(2) Install the shut-off valve to the bulkhead nut.
− Turn the shut-off valve.
Apply Loctite 545 to the threads of the
connector (from the third thread aft)..
Torque to 1.5 - 3 turns past finger tight.
(3) Put the thru-nut through the firewall from the
engine side.
(4) Install the elbow pipe nut to the thru-nut. Torque to 1.5 - 3 turns past finger tight.
(5) Remove the cap from the hose.
Connect the fuel hose to the fuel valve at the
engine side.
Apply Loctite 545 to the threads of the
connector (from the third thread aft).
(5a) Tighten the valve stem packing nut to give a
spring force of 15 to 30N (3.4 to 6.8 lbf ).
Measure perpendicular to the lever with the
lever aligned with the valve axis.
(6) Install the shut-off control rod to the fuel
valve lever.
(7) Open the maintenance shut-off valve.
(8) Connect the battery.
(9) Operate the electrical fuel pump.
(10) Examine the fuel shut-off valve installation. Look specially for fuel leaks.
(11) Examine the cover of the box for the fuel
shut-off valve. If necessary remove the old
sealant.
(12) Install the box cover. Use sealant to specification PRC 1428.
CAUTION: LOCK THE MAINTENANCE SHUT-OFF VALVE OPEN WITH WIRE.
IF YOU DO NOT LOCK THE VALVE OPEN IT MAY CLOSE IN
FLIGHT. THIS WOULD CAUSE ENGINE FAILURE.
(13) Lock the maintenance valve open with wire. Lock the maintenance valve to the
　
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