Class 35 'Hymek' Diesel Hydraulic Locomotive
Built by Beyer Peacock ay Manchester in 1962.
First allocated Depot was 82A Bristol Bath Road
Withdrawn in March 1975
D7017 has been very much part of the West Somerset Railway since the 70's operating trains over the
years. The loco was first moved to Taunton on leaving BR service before being moved up to Minehead.
Today the loco is very reliable and pleasure to be around. The loco had a re-built engine fitted in the mid
2000's which is still going strong.
Engine: Maybach MD870 V16 twin turbocharged and intercooled 87 litre diesel
Transmission: Mekydro K184 4-speed hydraulic gearbox
Weight: 73 tons
Length: 52 ft
Output: 1740 hp at 1500 rpm
BR Power Rating: Type 3
Fuel Capacity: 600 gallons
Tractive Effort: 49,000 lbs
Manufacturer: Beyer-Peacock (Hymek) Ltd, Manchester
Class: Class 35
Lifespan 1961 - 1975
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. 101 locos were built
up to 1964 and allocated all over the Western Region. They settled down to become a successful and
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
September. Due to loco shortages, ten Hymeks soldiered on to 1975 when they were finally withdrawn. Of
these, four have survived into preservation, our two - D7017 and D7018, D7029 with the Diesel Traction
Group, and D7076 with the Bury Hydraulic Group.
More photos below of D7017 from the JT collection.
D7017 at Crowcombe on the first day of through running from MD to BL.
D7017 at Minehead soon after preservation.