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Page Title:
Cleaning and Inspection of Burner Parts. |
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 1
Chamber
21
Head assembly
40
Nut
59
Bracket
2
Switch
22
Screw
41
Screw
60
Screw
8
Retainer
23
Washer
42
Plate
61
Washer
4
Screw
24
Screw
43
Collar
62
Seal
5
Union
25
Spark plug
44
Bushing
63
Blower assembly
6
Washer
26
Washer
45
Contact set
64
Bumper
7
Seal
27
Seal
46
Washer
65
Nut
8
Gasket
28
Burner
47
Screw
66
Motor
9
Screw
29
Gasket
48
Grommet
67
Cam
10
Lead
30
Preheater
49
Screw
68
Spacer
11
Lead
31
Insulator
50
Screw
69
Screw
12
Screw
32
Washer
51
Nut
70
Washer
13
Cover
33
Insulator
52
Cover
71
Insulator
14
Lead
34
Insulator
53
Casing
72
Bracket
15
Tube
35
Band
54
Cap
73
Insulator
16
Nut
36
Nut
55
Screw
74
Washer
17
Sleeve
37
Setscrew
56
Setscrew
75
Base
18
Plug
38
Fan
57
Screw
76
Screw
19
Nozzle
39
Screw
58
Washer
77
Shell
20
Nut
Figure 71.31-Continued.
cracked, burned, dented or otherwise
(10) To remove the burner assembly from the
damaged condition. Replace faulty parts.
combustion chamber, remove the union
(5), union seal washer (6), union seal (7),
f.
Blower Motor Test. Reassemble the blower
and gasket (8) extending from the burner
assembly to test the motors. Connect a power supply of
fuel feed connector. ire, washer (32),
proper voltage to the assembly and operate the motor.
insulator washer (33), post insulator (34),
Check motor speed with a stroboscope. The motor
connector band (35), and screw (39) from
speed should be a minimum of 6,500 rpm. Replace this
the combustion chamber.
motor if it does not meet this requirement.
(11) Remove the nut (20), lead w Remove the
g. Contact Plate Assembly.
screw (24) and washer (23) from each
(1) Inspect Contact Set. Disassemble the
side of the combustion chamber; then
heater to provide access to the contact
remove the burner (28).
plate.
Clean the contacts with fine
(12) The preheater (30) is threaded to the
sandpaper. If the contacts are burned or
burner; unscrew to remove the preheater
deeply pitted and are difficult to clean,
and gasket (29). Remove the preheater
replace both the contact set and the
nut (36) to remove the connector band
capacitor, since the capacitor probably
(35) from the preheater.
caused the faulty contact condition.
Adjust contact as described in paragraph
e. Cleaning and Inspection of Burner Parts.
(3) below.
(1) Use a cloth dampened with solvent, and
(2) Replace Contact Set and Capacitor.
dry, compressed air to clean accumulated
dirt from all heater parts. Scrape carbon
(a) Loosen the terminal nuts (40, fig.
deposits and other foreign materials
71.31) and disengage the capacitor
caused by combustion, being careful to
lead wire from the terminal.
avoid damaging the ceramic wick. Clean
Remove the capacitor mounting
air ports thoroughly to remove all
screw (57) and washer (58) and
accumulations of carbon, or restrictions.
remove the capacitor bracket (59)
(2) Inspect burner and blower parts,
combustion chamber, and casing for
AGO 5667A
33
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