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Page Title:
FLAME HEATER FUEL FILTER ASSEMBLY |
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 R - Flame heater fuel pump and fuel filter
A
-
Harness clamp
bracket
Harness clamp
B
-
S - No. 10 lock washer
Flame heater harness assembly
C
-
T - No. 10 x 1 machine screw
D
-
Pipe connector assembly
U - No. 10 plain nut
1-l/8-NPTF x 5/16-24NF-2A tube
V - No. 10 lock washer
connector
W - No. 10 x 7/8 machine screw
2-1/4-in. tube sleeve
X - Fuel filter-to- solenoid valve tube
3-5/16-in. tube nut
Y - Pipe connector assembly
E - Heater fuel return-to- solenoid valve tube
1-l/8-NPTF x 5/16-24NF-2A tube
F - No. 10 plain nut
2-1/4-in. tube sleeve
G - No. 10 lock washer
3-5/16-in. tube nut
H - Cushioned tube clamp
Z - Flame heater fuel filter assembly
J - No. 10 x 3/8 machine screw
1- Head
K - Heater fuel pump-to-flame heater nozzle
2- Gasket
tube
3- Element
L - Elbow assembly
4- Spring
1-l/8-NPTF x 5/16-24NF-2A 90 degree
5- Packing
elbow
6-Bowl
2-l/8-in. tube sleeve
A A - No. 10 x 1-3/4 machine screw
3-5/16-in. tube nut
M - No. 10 plain nut
BB - Elbow assembly
N - No. 10 lock washer
1- 1/8-NPTF X 1/2-20NF X 2A
P - Pipe connector assembly
90 degree elbow
1-5/16-in. tube nut
2- l/4-in. tube sleeve
2-l/4-in. tube sleeve
3- l/2-in. tube nut
3-l/8-NPTF x 5/16-24NF-2A tube
c c - Solenoid valve
connector
DD - Heater fuel pump-to-solenoid valve tube
EE - l/8-27NPT pipe coupling
Q - Flame heater fuel pump assembly
FIGURE 411. FLAME HEATER FUEL SYSTEM COMPONENTS -
EXPLODED VIEW - CONTINUED.
volt dc current, and pump fuel through
BLY
the valve. When fuel flows freely, valve
is functioning normally. Restricted fuel
Note. The key letters shown below in paren-
flow indicates a faulty electrical circuit
or improper torque setting of acorn
these refer to figure 411 except where other-
nut. Loosen acorn nut and torque tighten
wise indicated.
nut to 50 pound inches. Recheck solenoid
operation. If valve is still inoperative,
a. Disassembly. Remove No. 10 plain nut (U),
replace valve.
No. 10 lock washer (V and No. 10 x 1-3/4 ma-
chine screw (AA) and remove flame heater fuel
filter assembly (Z) from flame heater fuel pump
N o t e . Solenoid valves are normally
and fuel filter bracket (R). Disassemble the
closed and electrical current will open
valves.
flame heater fuel filter assembly as directed
in paragraph 81 b.
d. Repair. Replace the solenoid valves when
cracked, dented, or they fail to pass electrical
b. Cleaning and Inspection.
test.
(1) C l e a n i n g . Clean the flame heater fuel
e. Assembly Install three elbows (BB-1) in
assembly as directed in para-
solenoid valve CC).
graph 81 b.
f. Installation. Position two solenoid valves
(2) Inspection. Inspect the flame heater
(BB) on fuel pump and fuel filter bracket (R)
f u e l filter assembly as directed in
and secure with four No. 10 lock washers (S)
paragraph 81 b.
and No. 10 x 1 machine screws (T).
265
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