cracked burned, dented or otherwise
b.
Remove crane
engine
liquid
heater
damaged condition.
assembly (para. 278).
(2)
Replace faulty or defective parts.
572. Engine Liquid Heater Disassembly
574. Engine Liquid Heater Reassembly
Disassemble the liquid heaters in numerical sequence
a.
Reassembly. Reassemble the engine liquid
as illustrated on figure 272.
heaters in reverse of the numerical sequence as
illustrated on figure 272.
573. Engine Liquid Heater, Cleaning, Inspection,
b.
and Repair
(1) With the cam and contact plate
a.
Cleaning.
assembled to the motor, rotate the
(1) Use a cloth dampened with an
motor shaft until the moveable
approved cleaning solvent and clean
contact is at the high point of the cam.
accumulated dirt from all heater parts.
Make sure the rubbing block of the
(2) Scrape carbon deposits and other
moveable contact is between the
foreign
materials
caused
by
teeth of the cam collar.
At this
combustion, being careful to avoid
position, a 0.025-in. feeler gage
damaging the ceramic wick.
should just pass between the
(3) Clean all parts thoroughly to remove
contacts.
all accumulation of carbon, or
(2) If the gap needs adjusting, loosen the
restrictions.
adjustable contact mounting screw
and position the stationary contact to
b.
Inspection and Repair.
correct the contact gap. Tighten the
(1) Inspect burner and blower parts,
mounting screw.
combustion chamber, and casing for
1
Screw, mach
55
Grommet
82
Screw, Pan-hd, mach
2
Cover, control hd.
66
Nut, cad pI
83
Washer, flat, brass
3
Nut
57
Nut, cad pI
84
Insulator, Post
4
Sleeve
58
Blower assembly,
85
Bracket, terminal
6
Tube, fuel
combustion
86
Screw, set
6
Plug, pipe
59
Screw, cad pI
87
Fan assembly
7
Nozzle assembly
60
Cap
88
Shell assembly,
8
Screw, mach.
61
Screw, set
combustion, air
9
Nut, cad. pI.
62
Cam, set
89
Motor, electrc
10
Switch, flame
63
Bushing, Cam (part of Item 62)
90
Seal, tube
11
Head assembly, control
64
Collar, Cam (part of Item 62)
91
Screw, mach.
12-37 (See figure 272 B)
65
Plate assembly
92
Nut
38
Screw, rd hd
66
Spacer
93
Washer, flat
39
Retainer, switch
67
Cam, contact
94
Band, connector
40
Switch, limit
68
Screw, Pan-hd, mach.
95
Nut, cad pI
41
Union
69
Bracket, Capacitor
96
Washer, insulator
42
Washer, Union Seal
(part of Item 70)
97
Insulator, Post
48
Seal, Union
70
Capacitor and Bracket
98
Insulator band connector
44
Gasket
71
Screw, Pan-hd, mach.
99
Preheater assembly
45
Spark Plug Assembly
72
Screw, Pan-hd, mach.
100 Gasket, Ignitor sleeve
46
Washer, spark plug
73
Contact Set
101 Burner assembly,
47
Seal, spark plug
74
Washer, lock, split
complete
48
Screw, mach.
75
Plate, contact
102 Screw, hex hd
49
Cover Assembly, Intake
76
Nut, hex
103 Nut, cad pI
50
Screw, mach,
77
Washer, lock, ext tooth
104 Base assembly
51
Screw, rd-hd.
78
Nut, hex
105 Plug, pipe
52
Screw, hd.
79
Washer, lock, ext tooth
106 Chamber assembly,
53
Washer, special
80
Washer, flat, brass
combustion
54
Casing Assembly
81
Washer, insulator
A-Heater assembly
Figure 272. Engine liquid heater assembly.
AGO 6819A
304
