Class 35 ‘Hymek’ D7018

Class 35 ‘Hymek’ D7018

Beyer-Peacock ‘Hymek’ D7018 notches up the power while climbing towards Washford during the 2019 “Diesels to the Seaside” event on the WSR. Pictured on 21st June 2019 by Mark Ireland. © CC BY-NC 3.0

Current Status: Not available for service. Undergoing transmission repairs at Williton.

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Following withdrawal by BR in 1975, D7018 was first located at Didcot Railway Centre for a number of years before moving to Williton to join sister locomotive D7017.

The loco underwent a very lengthy heavy overhaul following a major engine failure at Williton in 1995, returning to service on the WSR during the 2019 “Diesels To The Seaside” event.

After running well during the 2021 and 2022 seasons, the locomotive developed a transmission fault that affected the direction control system and the loco has had to be stood down from duties. The transmission has been removed from the loco and is undergoing repairs at Williton. We expect the repairs to be completed by Autumn 2024.

Technical Specification
Engine: Bristol-Siddeley-Maybach MD870 V16 twin turbocharged and intercooled 87 litre high speed diesel
Transmission: Stone-Maybach-Mekydro K184 4-speed hydo-mechanical gearbox
Weight: 73 tons
Length: 52 ft
Output: 1,740 hp at 1500 rpm
BR Power Rating: Type 3
Speed: 90 mph
Fuel Capacity: 600 gallons
Wheels: B-B
Tractive Effort: 49,000 lbs

Manufacturer: Beyer-Peacock (Hymek) Ltd, Manchester
Built: 1962.
First allocated Depot: Bristol Bath Road (82A) on the 18th January 1962.
Withdrawn from BR: March 1975.
BR Class: 35
Number Built: 101
Role: Mixed traffic

The ‘Hymeks’ were intended as a medium power mixed traffic loco, but were often rostered to deputise for some of the WR’s largest steam locos on 13 and 14-coach trains in their early years. A total of 101 locos were built and were allocated all over the Western Region. They settled down to become a successful and capable fleet.

Introduced in 1961-4, the ‘Hymeks’ careers were cut short by BR’s standardisation with diesel-electric types. The first withdrawals came in 1971, with some locos scrapped being less than nine years old. Full withdrawal of the fleet was planned for 1973 and a farewell tour, “The Hymek Swansong”, ran in the September of that year. Due to loco shortages, ten ‘Hymeks’ soldiered on to 1975 when they were finally withdrawn. Of these, four have survived into preservation: the two D&EPG ‘Hymeks’ D7017 and D7018; D7029 with the Diesel Traction Group and D7076 with the Bury Hydraulic Group.

Read about sister locomotive D7017

Go to the Locomotive Status page

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