An early system of car type classification saw the 3-car sets contain:
DMBS - A3 type motor coach
TC - D type trailer
DMC - B1 type motor coach
When TOPS was introduced each vehicle type was allocated a different class / sub class as shown in the table below. Later the TOPS classes were rationalised and all simply became Class 104.
Alterations to TOPS in the early '80s saw the need to avoid duplicated numbers, so 50xxx and 56xxx vehicles had to be renumbered to 53xxx and 54xxx respectively, keeping the last three digits.
|Numbering||Type||Dgrm.||Lot No.||Seats||Weight||Intro.||Roof Lamp|
|50420 - 50423||DMBS||556||30290||52||31 tons||3-car||1957||LMR||Yes|
|50424 - 50427||DMCL||558||30291||12 / 54||31 tons||3-car||1957||LMR||Yes|
|50428 - 50479||DMBS||556||30293||52||31 tons||3-car||1957||LMR||50428 to 50443 only|
|50480 - 50531||DMCL||558||30294||12 / 54||31 tons||3-car||1957||LMR||50480 to 50495 (and 50529?)|
|50532 - 50541||DMBS||556||30296||52||31 tons||P.trailer||1958||LMR||No|
|50542 - 50593||DMCL||(see below)||12 / 51||31 tons||4-car||1958||ER||No|
|50594 - 50598||DMBS||557||30404||52||31 tons||P.trailer||1958||ER||No|
|56175 - 56184||DTCL||585||30297||12 / 54||24.5 tons||P.trailer||1958||LMR||No|
|56185 - 56189||DTCL||581||30405||12 / 51||24.5 tons||P.trailer||1958||ER||No|
|59132 - 59187||TCL||(See below)||12 / 51||24 tons||3-car||1957||LMR||-|
|59188 - 59208||TSL||583||30299||69||24 tons||4-car||1958||ER||-|
|59209 - 59229||TBSL||584||30300||51||25 tons||4-car||1958||ER||-|
|59230 - 59234||TSL||583||30302||69||24 tons||4-car||1958||ER||-|
|59240 - 59244||TBSL||584||30303||51||25 tons||4-car||1958||ER||-|
ER DMCLs 50542-93 were composed of two different Lot numbers, one for each of the batches, and with each Lot number they were built to two Diagrams. The difference between each was allocation of the (non) smoking sections, and a 4-car set would have one of each Diagram.
|50542 - 50562||Lot no. 30298||Diagram 580|
|50563 - 50583||Lot no. 30298||Diagram 559|
|50584 - 50588||Lot no. 30301||Diagram 580|
|50589 - 50593||Lot no. 30301||Diagram 559|
LMR TCLs 59132-87 had two different Lot numbers, as they were part of two batches. All were to Diagram 582.
|59132 - 59135||Lot no. 30292|
|59136 - 59187||Lot no. 30295|
Original Set Formations
|Power Trailer (15)|
|DMBS||M50532 - 50541||DTC||M56175 - 56184|
|DMBS||E50594 - 50598||DTC||E56185 - 56189|
|3-car sets (56)|
|DMBS||M50420 - 50423||TC||M59132 - 59135||DMC||M50424 - 50427|
|DMBS||M50428 - 50479||TC||M59136 - 59187||DMC||M50480 - 50531|
|4-car set (26)|
|2 x DMCL||E50542 - 50583||TS||E59188 - 59208||TBS||E59209 - 59229|
|2 x DMCL||E50584 - 50593||TS||E59230 - 59234||TBS||E59240 - 59244|
Worksplates were carried on the vehicle solebars to identify the builder and lot number. Many of the worksplate images on the website are by Simeon Gaskell and John Horne.
Single Engine Conversion
3-car diagrams & Works Pics
2-car diagrams & Drivers Instructions
4-car diagrams & Works Pics
Details about preserved Class 104s can be found here.
Many thanks to Kevin Dowd for his assistance in the preparation of these pages, and to Eddie Knorn for further data.