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 1
Hose
21
Elbow
41
Clamp
60
Elbow
2
Clamp
22
Tube
42
Clamp
61
Adapter
8
Heater
23
Valve assembly
43
Hose
62
Hose
4
Hose
24
Tube
44
Insulation
63
Elbow
5
Chain
25
Tube assembly
45
Adapter
64
Coolant heater
6
Hook, S
26
Bushing
46
Strainer
65
Elbow
7
Handle installation
27
Cock
47
Element
66
Tube
8
Handle
28
Valve
48
Insulation
67
Switch
9
Bushing
29
Bolt, U
49
Plug
68
Tube assembly
10
Elbow
30
Elbow assembly
50
Nipple
69
Bushing
11
Clamp
31
Tube assembly
51
Elbow
70
Tee assembly
12
Washer
32
Insulation
52
Reducer
71
Cock
13
Washer
33
Tube
53
Nipple
72
Tube assembly
14
Nut
34
Tube assembly
54
Coupling
73
Tube
15
Bushing
35
Tube assembly
55
Nipple
74
Elbow
16
Elbow
36
Bushing
56
Elbow
75
Pipe
17
Hose
37
Cock
57
Tee
76
Bushing
18
Tube assembly
38
Tube
58
Nipple
77
Nipple
19
Valve
39
Space heater
59
Pump installation
78
Nipple
20
Bushing
40
Hose
Figure 71.30--Continued.
(4) Remove the four screws (50) attaching
which extends to the liquid circulating
the casing to the combustion chamber (1).
pump through the grommet (24, fig.
71.28) in the control head base.
(5) Remove four screws joining the casing at
the seam. Spread the casing and lift from
(6) Remove the screw (9, fig. 71.31) and the
the blower assembly (63), burner (28),
nut (20), and lift the control head
and combustion chamber, withdrawing
assembly (21) and the flame switch
wire through the rubber grommet (48) in
assembly (11) from the casing and
the casing.
combustion chamber. When necessary to
further disassemble the control head, see
(6) Remove four nuts (65) fastening the
control head repair instructions in
combustion blower assembly (63) to the
paragraphs 192 and 193.
combustion chamber; remove the blower
assembly.
c. Limit Switch Removal. Disconnect the wires at
the two limit switch terminals. Remove two screws (4)
(7) Insert a screwdriver through the shell
fastening the limit switch (2) to the combustion chamber.
intake opening; loosen the setscrew (37)
Remove the switch retainer (3).
and remove the fan (38).
d. Casing Disassembly.
(8) Disconnect the lead wire at the contact
plate terminal. Remove the three screws
(1) Remove the spark plug assembly (25),
(55) and the contact plate cap (54).
washer (26), and seal (27) from the
Remove the screws and lock washers
burner.
joining the contact plate assembly, motor,
(2) Remove the two screws (76) attaching the
and shell. Remove the contact plate (42)
heater mounting base assembly (75) to
and the two spacers (68); on the opposite
the casing and the combustion chamber.
end of the motor, remove the combustion
Remove the heater mounting base
air intake shell (77).
assembly and remove seal (62).
(9) Remove screw (56), and remove the
(3) Remove the three screws (49) and the
bushing (44), cam collar (43), and contact
intake cover (52) from the casing (53).
cam (67) from the motor shaft.
AGO 5667A
31
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