| Class | Wheel Arr- angement |
Dr. Diam. |
Cylinders Diam. x Str. |
Boiler Press. |
Ad. Wt. |
EW WO |
Grate Area |
Evap. Surface |
Sup. Surface |
Remarks |
| A | 2-6-0 | 39in | 12x20in | 140psi | 16t | 20t | 10sq.ft. | 540sq.ft. | none | |
| ASG | 4-8-2+2-8-4T | 48in | 14¼x24in(4) | 200psi | 73t | 119t | 35sq.ft. | 1700sq.ft. | 315sq.ft. | Garratt |
| B | 4-6-0T | 37¾in | 14x21in | 160psi | 21t | 35t | 12sq.ft. | 595sq.ft. | none | |
| C | 0-6-0T+T | 36in | 10½x18in | 120psi | 19t | 19t | 12sq.ft. | 715sq.ft. | none | |
| Ca | 4-6-2 | 49in | 16½x22in | 175psi | 27t | 44t | 18sq.ft. | 1250sq.ft. | none | |
| D | 4-6-4T | 54in | 18x23in | 160psi | 36t | 74t | 19sq.ft. | 1420sq.ft. | none | Some ex E |
| Dd | 4-6-4T | 54in | 18x23in | 160psi | 35t | 72t | 19sq.ft. | 1145sq.ft. | 175sq.ft. | |
| Ds | 4-6-4T | 54in | 18x23in | 160psi | 35t | 72t | 19sq.ft. | 970sq.ft. | 175sq.ft. | |
| E | 2-4-4-2T | 39in | 10x18in(4) | 120psi | 28t | 34t | 13sq.ft. | 840sq.ft. | none | Fairlie |
| E | 4-6-2 | 54in | 17x23in | 180psi | 36t | 53t | 19sq.ft. | 1420sq.ft. | none | |
| Es | 4-6-2 | 54in | 19x23in | 160psi | 36t | 53t | 19sq.ft. | 1095sq.ft. | 185sq.ft. | |
| F | 2-4-2T | 39in | 10x18in | 120psi | 15t | 23t | 7sq.ft. | 420sq.ft. | none | Ex Fairlie |
| F | 4-8-0 | 42½in | 17x23in | 175psi | 43t | 53t | 19sq.ft. | 1380sq.ft. | none | |
| Fs | 4-8-0 | 42½in | 19x23in | 160psi | 43t | 56t | 19sq.ft. | 1100sq.ft. | 260sq.ft. | |
| G | 2-6-0 | 39in | 14½x20in | 160psi | 21t | 25t | 14sq.ft. | 780sq.ft. | none | |
| G bogie | 4-6-0 | 39in | 14½x20in | 160psi | 21t | 27t | 14sq.ft. | 780sq.ft. | none | |
| H | 0-6-0T | 27in | 9x14in | 120psi | 14t | 14t | none | |||
| I | 0-6-4T | 36in | 13x16in | 130psi | 23t | 38t | 14sq.ft. | 665sq.ft. | none | NZGR S |
| J | 4-6-0 | 42½in | 15x22in | 140psi | 21t | 29t | 12sq.ft. | 685sq.ft. | none | |
| Ja | 4-6-0 | 42½in | 15x22in | 160psi | 22t | 30t | 14sq.ft. | 815sq.ft. | none | |
| K | 2-8-4T | 38in | 17x21in | 160psi | 33t | 52t | 17sq.ft. | 1010sq.ft. | none | Original |
| K | 2-8-4T | 38in | 17x21in | 160psi | 34t | 53t | 16sq.ft. | 975sq.ft. | none | Reboilered |
| M | 2-6-0 | 39in | 12x18in | 140psi | 15t | 18t | 10sq.ft. | 540sq.ft. | none | |
| M | 2-6-0+0-6-2T | 39in | 12½x20in(4) | 175psi | 52t | 67t | 23sq.ft. | 1340sq.ft. | none | Garratt |
| Ms | 2-6-0+0-6-2T | 39in | 13¼x20in(4) | 160psi | 56t | 70t | 23sq.ft. | 1065sq.ft. | 180sq.ft. | Garratt |
| Msa | 2-6-0+0-6-2T | 39in | 13¼x20in(4) | 160psi | 60t | 74t | 27sq.ft. | 1085sq.ft. | 180sq.ft. | Garratt |
| N | 4-4-4T | 49½in | 15½x21in | 160psi | 24t | 48t | 16sq.ft. | 860sq.ft. | none | Some ex O |
| O | 2-8-0T+T | 36in | 15½x21in | 160psi | 32t | 36t | 16sq.ft. | 860sq.ft. | none | |
| Oa | 2-8-0T+T | 49½in | 15½x21in | 160psi | 33t | 38t | 16sq.ft. | 860sq.ft. | none | |
| P | 4-4-0 | 54in | 15x20in | 135psi | 17t | 28t | 14sq.ft. | 870sq.ft. | none | |
| Pm | 4-6-2 | 54in | 19x26in | 175psi | 42t | 63t | 35sq.ft. | 1505sq.ft. | 365sq.ft. | |
| Pr | 4-6-2 | 54in | 19x26in | 175psi | 42t | 65t | 35sq.ft. | 1555sq.ft. | 365sq.ft. | |
| Q | 4-6-2T | 42½in | 15x22in | 160psi | 23t | 39t | 14sq.ft. | 815sq.ft. | none | |
| Qa | 4-6-4T | 42½in | 15x22in | 160psi | 23t | 42t | 14sq.ft. | 815sq.ft. | none | Ex Q |
| R | 4-4-0 | 57in | 16x22in | 160psi | 20t | 32t | 17sq.ft. | 900sq.ft. | none | |
| Ra | 4-4-2 | 57in | 16x22in | 160psi | 20t | 33t | 17sq.ft. | 900sq.ft. | none | Ex R |
| S | 4-8-2 | 48in | 19x24in | 200psi | 53t | 77t | 40sq.ft. | 1675sq.ft. | 450sq.ft. | |
| T | 4-4-0 | 52in | 15x20in | 140psi | 18t | 30t | 15sq.ft. | 845sq.ft. | none | |
| U | 4-6-2 | 54in | 18x24in | 180psi | 35t | 59t | 26sq.ft. | 1125sq.ft. | 260sq.ft. | SGR 220 |
| Ut | 4-6-4T | 54in | 18x24in | 180psi | 36t | 81t | 26sq.ft. | 1125sq.ft. | 260sq.ft. | Ex U |
| V | 2-8-2 | 51in | 19x26in | 215psi | 57t | 81t | 40sq.ft. | 1815sq.ft. | 500sq.ft. | |
| W | 4-8-2 | 48in | 16x24in | 200psi | 39t | 63t | 27sq.ft. | 1115sq.ft. | 305sq.ft. |
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