The 8516-IV illustrated parts guide covers the fourth-generation furnace's internal assemblies, including the combustion wheel, motor mounting hardware, gas components and furnace-door fittings. Where the source names a newer replacement, both references remain visible.
Use the illustration number to locate the original manufacturer part reference. Select a linked part number to view product details and availability. Check the furnace model, serial-number range and replacement notes before ordering.
Original part numbers for Excalibur 8516-IV
| Reference | Manufacturer part number | Quantity | Part description |
|---|---|---|---|
| 1 | 37764 | 1 | BLOWER WHEEL USE 33126 |
| 1 | 33126 | 1 | BLOWER WHEEL KIT |
| 2 | 37605 | 1 | BLOWER HOUSING BACK |
| 3 | 37606 | 1 | BLOWER HOUSING |
| 4 | 37607 | 1 | BLOWER HOUSING VENTURI |
| 5 | 36043 | 1 | BURNER USE 30268 |
| 5 | 30268 | 1 | BURNER HEAD, LP GAS |
| 6 | 33751 | 1 | CIRCUIT BREAKER 7-AMP |
| 7 | 36121 | 1 | ON-OFF SWITCH USE 31092 |
| 7.1 | 31092 | 1 | ON/OFF SWITCH KIT |
| 8 | 31017 | 1 | KLIXON TIME DELAY RELAY |
| 9 | 37107 | 1 | COMBUSTION WHEEL USE 33128 |
| 9 | 33128 | 1 | COMBUSTION AIR WHEEL |
| 9 | 37084 | 1 | COMBUSTION AIR RESTRICTOR 1-1/4 |
| 10 | 33620 | 1 | INNER DOOR HINGE - 1PR |
| 11 | 37129 | 1 | FURNACE DOOR A/W - NLA |
| 12 | 33754 | 1 | DOOR ASSY, DELUXE, 02, COLONIAL WHITE |
| 12 | 33756 | 1 | DOOR ASSY, DELUXE, 04, POLAR WHITE |
| 12 | 33764 | 1 | EXCALIBUR DOOR, BEIGE |
| 12 | 34517 | 1 | EXCALIBUR DOOR, GREY |
| 13 | 37411 | 1 | SLIDE PLATE |
| 14 | 31030 | 1 | T-STAT - BEIGE USE 38452 |
| 14 | 38452 | 1 | T-STAT HEAT ONLY - BROWN |
| 14 | 38453 | 1 | THERMOSTAT HEAT ONLY - WHITE |
| 15 | 38604 | 1 | WHITE ROGERS VALVE USE 31150 |
| 15 | 31150 | 1 | GAS VALVE, SIDE OUTLET, 12 VDC COIL - WHITE-ROGERS |
| 16 | 37620 | 1 | DRAFT CAP - Before SN 1260456 |
| 16 | 38139 | 1 | DRAFT CAP - After SN 1260455 |
| 17 | 36716 | 1 | IGNITION BOARD (DC) WAS SUPERCEEDED BY 38676 USE 31501 |
| 17 | 38676 | 1 | DSI BOARD WAS SUPERCEEDED USE 31501 |
| 17 | 31501 | 1 | ELECTRONIC IGNITION BOARD |
| 18 | 33686 | 1 | IGNITION BOARD BRACKET USE 34541 |
| 18 | 34541 | 1 | BRACKET DSI DC MOUNT |
| 19 | 31474 | 1 | DUCT ADAPTER 4 INCH |
| 19 | 36688 | 1 | DUCT ADAPTER 2 INCH |
| 20 | 31361 | 1 | DUCT COVER PLATE, 4 INCH |
| 21 | 37057 | 1 | SINGLE SENSE ELECTRODE USE 34570 |
| 21.2 | 34570 | 1 | SINGLE SENSE ELECTRODE W/LEAD |
| 21 | 32172 | 1 | DSI ELECTRODE GASKET-DUAL SENSE |
| 22 | 37419 | 1 | HIGH TENSION WIRE |
| 22 | 37773 | 1 | SHIELDED SPARK WIRE (OPTIONAL) |
| 23 | 37604 | 1 | MOTOR LOCK BRACKET |
| 24 | 37601 | 1 | MOTOR MOUNTING WALL |
| 25 | 37600 | 1 | MOTOR GASKET |
| 26 | 37696 | 1 | MOTOR 8516/20 USE 37359 |
| 26 | 37359 | 1 | MOTOR KIT PF20076Q |
| 27 | 31257 | 1 | BURNER ORIFICE #56 |
| 28 | 37716 | 1 | SAIL SWITCH USE 36680 |
| 28 | 36680 | 1 | SAIL SWITCH USE 31377 |
| 28 | 31377 | 1 | SAIL SWITCH |
| 29 | 37410 | 1 | GAS INLET PLUG |
| 30 | 37958 | 1 | HEATING ELEMENT KIT - After SN 1260455 |
| 30 | 37960 | 1 | HEATING ELEMENT KIT - Before SN 1260456 |
| 31 | 32926 | 1 | GASKET, HEATING ELEMENT - Before SN 1260456 |
| 31 | 37956 | 1 | GASKET, HEATING ELEMENT - After SN 1260455 |
| NS | 37022 | 1 | LIMIT SWITCH 190 DEGREE |
Replacement parts shown in the diagram
These listings match manufacturer numbers linked in the parts table. Check the complete furnace model, serial number and version of each component before ordering. View product pages for current availability.
Diagram ref 1 · MPN 33126
Atwood 33126 Furnace Blower Wheel with Clamp - 8500 Series
View product and availability
Diagram ref 5 · MPN 30268
Atwood 30268 LP-Gas Furnace Burner Head
View product and availability
Diagram ref 17 · MPN 31501
Atwood 31501 12V DSI Furnace Ignition Board With Fan Control
View product and availability
Diagram ref 19 · MPN 31474
Atwood 31474 Aluminum 4-Inch RV Furnace Duct Collar
View product and availability
Diagram ref 22 · MPN 37419
Atwood 37419 Furnace High-Tension Ignition Lead - Later Serial
View product and availability
Diagram ref NS · MPN 37022
Atwood 37022 190°F High-Limit Switch for 8500 Furnaces
View product and availability