Class 33 Crompton Bo-Bo diesel electric

Lima Birmingham RCW type 3 (BR Class 33) as D6524 in BR blue

Lima Birmingham RCW type 3 (BR Class 33) as D6524 in BR green



Mixed traffic

Operating company/organisation


Years of operation

1960 to present




Model/catalogue/item number

1646M (BR green)
8049M (BR blue)
8049CL (BR blue with working lights)
8015M (Irish Railways colours)


Ready to run plastic and metal model.

Motive power replacement

For the Lima body as supplied
The Lima body is slightly too wide, but if you are able to accept this, the pre-Genesis Athearn F7A chassis is a snug fit. Also just right for the unslimmed body is the chassis from the revived Krupps V160 from Mehano.

For slimmed bodies
The FA2 (or FB2) chassis from the Life-Like Proto 2000 range has the correct 101.6 mm bogie centres, and bogies with wheelbases that are just 1mm short. To fit the Proto 2000 chassis correctly, you should narrow the inside measurement of the loco body shell from 33mm to 29mm. Modification and/or removal of the cooling fan drive chain and battery box section will also be necessary.

Check current availability of the Athearn and Life-Like chassis with Model Junction.

Check current availability of the Mehano Krupps V160 with your local retailer (in the UK, any Bachmann dealer).


An article describing how to narrow and detail the model was published in the November 1983 edition of Scale Trains.


Produced from 1976 to c.1980.


See Buying second-hand.


The earliest HO releases had continental loop-type couplers. Later HO versions were released with UK tension-lock couplers. Eventually, an entirely new Class 33 model was released in 00.

British 1:87 Scale Modelling