The P40B park-model furnace uses its own cabinet and control assemblies. This illustrated guide separates external cabinet components, internal electrical and vent pieces, the gas train, and the motor and blower system without assuming every P40 part fits P40B.

Use the drawing positions and Suburban part numbers below to identify each component. Check the furnace model, fuel type and serial number before choosing a replacement.

1. P40B cabinet and mounting pieces

Suburban P40B original service illustration 1: p40b cabinet and mounting pieces
Illustration 1 — P40B cabinet and mounting pieces. Match the drawing callout to the manufacturer number below.
Drawing reference Manufacturer part number Quantity Component description
1 102274 1 CABINET ASSEMBLY P40B
2 121662 2 FASTNER TINNERMAN USE 122060
2 122060 2 FASTENER, TINNERMAN
4 101878 1 CABINET FRONT
6 50715 4 DUCT COLLAR, 4 IN.
7 161154 1 THERMOSTAT, WALL (WHITE)
9 90544 1 JUNCTION BOX COVER
10 231827 2 BUSHING, SNAP 7/8IN

2. Electrical, chamber and vent assemblies

Suburban P40B original service illustration 2: electrical, chamber and vent assemblies
Illustration 2 — Electrical, chamber and vent assemblies. Match the drawing callout to the manufacturer number below.
Drawing reference Manufacturer part number Quantity Component description
11 520944 1 TRANSFORMER, 24VAC
13 021203BK 1 COMBUSTION CHAMBER ASSEMBLY
15 70163 1 GASKET, ELECTRODE USE 071076
15 71076 1 BURNER/ELECTRODE GASKET SET USE 72103
15 72103 1 GASKET KIT, BURNER /ELECTRODE
15 525011 1 SERVICE KIT, GASKETS BURNER / ELECTRODE
16 230956 1 ELECTRODE 3 PRONG
16 525019 1 SERVICE KIT, ELECTRODE
NS 231261 1 ELECTRODE WIRE
19 30764 1 BURNER ACCESS DOOR
20 70398 1 GASKET, BURNER ACCESS DOOR USE 071076
20 71076 1 BURNER/ELECTRODE GASKET SET USE 72103
20 72103 1 GASKET KIT, BURNER /ELECTRODE
20 525011 1 SERVICE KIT, GASKETS BURNER / ELECTRODE
22 230825 1 LIMIT SWITCH 195 DEGREE
24 70362 1 BUSHING, SNAP
26 230714 1 SPLICER
28 63248 1 BRACKET POWER SUPPLY
32 520947 1 MODULE BOARD 24V
34 70538 1 INSULATOR, MODULE BOARD
35 231827 1 BUSHING, SNAP 7/8IN
36 90301 1 PANEL, BOARD MOUNTING
39 52041 1 INTAKE TUBE ASSY
40 260560 1 VENT CAP, EXHAUST TUBE, RAIN SHEILD ASSY

3. Burner, fuel-specific orifices and manifold

Suburban P40B original service illustration 3: burner, fuel-specific orifices and manifold
Illustration 3 — Burner, fuel-specific orifices and manifold. Match the drawing callout to the manufacturer number below.
Drawing reference Manufacturer part number Quantity Component description
44 10702 1 BURNER ASSY
45 180216 1 ORIFICE #49 (LP GAS ONLY)
45 180259 1 ORIFICE #30 (NATURAL GAS ONLY)
46 70408 1 GASKET, MANIFOLD PIPE
48 171034 1 MANIFOLD PIPE
49 62819 1 VALVE MOUNTING BRACKET
50 170375 1 BRASS GAS FITTING
53 161132 1 VALVE 24V.A.C.

4. P40B motor, air wheels and blower housings

Suburban P40B original service illustration 4: p40b motor, air wheels and blower housings
Illustration 4 — P40B motor, air wheels and blower housings. Match the drawing callout to the manufacturer number below.
Drawing reference Manufacturer part number Quantity Component description
54 121595 4 TINNERMAN U-CLIP
55 232846 1 MOTOR
56 121951 2 NUT #2-56
57 121247 2 SCREW, 2-56 X 5/8 HEX
58 232325 1 SAIL SWITCH USE 233070
58 233070 1 SAIL SWITCH USE 233242
58 233242 1 SAIL SWITCH USE 233383
58 233383 1 SAIL SWITCH
59 520837 1 CAPACITOR, W/ BOOT
60 390543BK 1 BLOWER HOUSING ASSY
61 520837 1 CAPACITOR, W/ BOOT
63 62925 1 CLAMP, CAPACITOR
64 350086 1 WHEEL, ROOM AIR
66 70385 2 GASKET CROSSOVER TUBE
67 50751 1 TUBE, CROSSOVER
69 70844 1 GASKET, MOTOR
70 391021BK 1 COMBUSTION AIR HOUSING ASSM.
71 70362 1 BUSHING, SNAP
74 350124 1 WHEEL, COMBUSTION AIR
75 70386 1 GASKET, COMBUSTION AIR
76 121712 1 BOLT, TINNERMAN
77 390424 1 HOUSING, COMBUSTION AIR (OUTSIDE)
79 63522 1 SUPPORT BRACKET

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