MAIN 4 DETAIL DIFFERENCES

1

Airhorns

The first Class 25s had the same body ((box out plus pic 5. Credit))

as the Class 24s and that included the bufferbeam-mounted airhorns. Starting with D5176, the horns were mounted either side of the headcode panel. Some received a revised design with the horn moulding being flush with the panel’s wings.

3 Side air louvres

The other principle area of alteration for the Class 25/2 was the side louvres (air intakes). Comparison tests were undertaken between a Derby-built Type 2 and a BRCW Type 2 concerning the air quality in the engine room. The Derby-built Type 2 design allowed much more debris to get through the filters. A redesign was commissioned with the intention of giving a less cluttered appearance to the exterior and saving money over the course of the service life.

End doors 2

The Class 24s and some of the early Class 25s were fitted with end doors with a folding corridor connection behind. This was to allow for access to the train heating boiler when working in multiple so that the boiler could be shut down 15 minutes before it was detached from the train. After the rule requiring this was no longer in force, the doors were sealed up, but as new locomotives didn’t require them the end was redesigned. The Class 25/2s sport this new cab end arrangement.

Removable 4 blanking plates

After a particularly cold winter in 1963, the Class 25s struggled with the water and steam heating systems freezing and causing breakdowns. To solve this, removable blanking plates were fitted to the large bodyside grille adjacent to the train heating boiler.