| Diagram # | Order | Product ID | Description |
| 1 | N/A | N/A | BOILER ASSEMBLY (# 21155) |
| | N/A | N/A | BOILER ASSEMBLY (# 21156) |
| | N/A | N/A | BOILER ASSEMBLY (# 21158) |
| 2 |  | P14653 | LAMP INSERT (#s 21155 & 21156) |
| 3 | N/A | N/A | FIBRE WASHER |
| 4 | N/A | N/A | SCREW |
| 5 |  | S5A34 | SCREW |
| 6 |  | P10174 | SMOKE TUBE (# 21155 ONLY) |
| 7 | N/A | N/A | SMOKE UNIT ASSEMBLY (# 21155 ONLY) |
| 8 | N/A | N/A | PISTON (# 21155 ONLY) |
| 9 |  | PA15021 | WORM GEAR STUD (# 21155 ONLY) |
| 10 |  | PA15019 | 22 TOOTH WORM GEAR (smoke drive# 21155 ONLY) |
| 11 |  | W240 | FIBRE WASHER |
| 12 | N/A | N/A | BEARING |
| 13 |  | XA15B024 | ARMATURE ASSEMBLY |
| 14 | N/A | N/A | CHASSIS, BEARING & SPRING ASSEMBLY |
| 15 |  | P10052@ | PISTON LEVER (# 21155 ONLY) |
| 16 |  | P10057 | PISTON PIN (# 21155 ONLY) |
| 17 | N/A | N/A | FLANGELESS WHEEL & AXLE ASSEMBLY (#s 21155 & 21156) |
| | N/A | N/A | FLANGELESS WHEEL w/STUD (#s 21155 & 21156) |
| |  | PA15226 | PLAIN AXLE |
| | N/A | N/A | FLANGELESS WHEEL & AXLE ASSEMBLY (# 21158) |
| | N/A | N/A | FLANGELESS WHEEL w/STUD (# 21158) |
| |  | PA15226 | PLAIN AXLE |
| 18 |  | XA15220 | PULL-MOR WHEEL, GEAR & AXLE ASSEMBLY (#s 21155 & 21156) |
| | N/A | N/A | PULL-MOR WHEEL (#s 21155 & 21156) |
| |  | PA15225 | GEAR AXLE |
| |  | PA15A218 | 20 TOOTH WORM GEAR (motor) |
| | N/A | N/A | PULL-MOR WHEEL, GEAR & AXLE ASSEMBLY (# 21158) |
| | N/A | N/A | PULL-MOR WHEEL (# 21158) |
| |  | PA15225 | GEAR AXLE |
| |  | PA15A218 | 20 TOOTH WORM GEAR (motor) |
| 19 |  | S5N33 | SCREW |
| 20 |  | S181 | SCREW |
| 21 |  | XA15A219 | FLANGED WHEEL & AXLE ASSEMBLY (#s 21155 & 21156) |
| |  | PA15031 | FLANGED WHEEL (#s 21155 & 21156) |
| |  | PA15226 | PLAIN AXLE |
| |  | XA15A219 | FLANGED WHEEL & AXLE ASSEMBLY (# 21158) |
| |  | PA15031 | FLANGED WHEEL (# 21158) |
| |  | PA15226 | PLAIN AXLE |
| 22 | N/A | N/A | SIDE ROD (front) |
| 23 |  | PA15A224 | WORM GEAR (armature) |
| 24 |  | PA12355A | LEAF SPRING |
| 25 |  | XA12A047@ | KNUCKLE COUPLER ASSEMBLY (#s 21155, 21156 & SOME 21158 {Front Only}) |
| |  | PA15215 | SOLID KNUCKLE COUPLER (# 21158 {Rear Only}) |
| 26 |  | S5A29 | SCREW |
| 27 |  | PA10595R | CROSSHEAD GUIDE (right) |
| |  | PA10595L | CROSSHEAD GUIDE (left) |
| 28 | N/A | N/A | PISTON ROD SCREW |
| 29 |  | XA15A008 | CROSSHEAD ASSEMBLY |
| 30 |  | PA7237A | PISTON ROD SPACER |
| 31 | N/A | N/A | FIBRE WASHER |
| 32 |  | S5A37 | ECCENTRIC CRANK SCREW |
| 33 | N/A | N/A | CHASSIS (lower) |
| 34 |  | XA15222 | PICK-UP ASSEMBLY |
| |  | PA15176 | CONTACT |
| |  | PA15176A | FORMED CONTACT |
| |  | PA15178 | PICK-UP SHOE |
| |  | PA15178A | PICK-UP SHOE |
| 35 |  | S4N30 | SCREW |
| 36 | N/A | N/A | SIDE ROD (rear) |
| 37 | N/A | N/A | REMOTE CONTROL ASSEMBLY (#s 21155 & 21156) |
| 38 | N/A | N/A | SCREW (#s 21155 & 21156) |
| 39 | N/A | N/A | FIELD ASSEMBLY |
| 40 | N/A | N/A | SHOULDERED SCREW |
| 41 |  | PA14A917 | BRUSH |
| 42 | N/A | N/A | PAL NUT |
| 43 |  | PA14A919R | BRUSH SPRING (right) |
| |  | PA14A919L | BRUSH SPRING (left) |
| 44 |  | PA10059 | SOLDER TERMINAL |
| 45 | N/A | N/A | COUPLER BRACKET |
| 46 | N/A | N/A | BRUSH BEARING MOUNT |
| 47 |  | PA15A034 | PULL-MOR TIRE |
| 48 |  | PA6173 | SOLDER TERMINAL (#s 21155 & 21156) |