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Class 104 BRC&W 2, 3 & 4-car DMUs


Numbering

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.

DMC 104/1    TS 160
DMBS  104/2 TBS  166
DMS 104/3 TC 169
DTC 140

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

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