The nineteen year five month career of D5151/25001 was spent allocated to depots on both sides of the Pennines and north of the border (ER, LMR & ScR).
Built: BR Darlington Locomotive Works.
D5151 was new to Thornaby (51L) on April 15th 1961. Further transfers were:
September 1967 to Gateshead (52A).
Renumbered March 1974.
25001 was the 42nd Class 25 withdrawn, one of nine retired during September 1980.
After withdrawal 25001 was moved with 25013/19/21, being noted at Durham behind 40006 on October 10th. Ironically an overnight stop was made at Thornaby - 25001's first home. Here withdrawn 31274 was added to the consist, which left on 16th, it is believed with 25001 towing the consist! (as the 07.20 York - Swindon). By October 19th they had been received at Swindon Works. 25001 was broken up by the first week of December 1980.
Works visits (records incomplete).
Noted Darlington Works August 1962.
D5151 was the first of the Type 2s built with the newer 1,250hp "B" engine, modified generator assembly and traction motors. This increase in horsepower was obtained from an air/water free flow intercooler fitted between a higher capacity pressure charger and inlet manifold, included within the normal cooling circuit to maintain simplicity. The cylinder head was also modified and strengthened. The BTH generator was now rated as 735kW, 750/545V, 1090/1500A at 750 rpm, only slightly different from the earlier Class 24s. The traction motors were rated at 245hp, 545V, 375A at 560 rpm with a gear ratio of 18:79. Maximum tractive effort was 39,000lb whilst continuous t.e. was 20,800lb at 17.1mph, the latter standard for all Class 25s. Horsepower at the rail was 949, now available between 9.3 and 77.6 mph, with maximum speed increased to 90mph. The fuel capacity of the first fifteen remained at 520 gallons, locomotive weight was 70.25 tons, whilst the final ten had larger 620 gallon fuel tanks, with a weight of 72.35 tons.
D5151 - D5175 utilized the Class 24/1 bodyshell, cabs and paint scheme, and like the Class 45s the side grilles were highlighted in grey. As they had been ordered for working freight traffic in the Teeside area this batch of locomotives were not equipped with steam heating equipment.
D5151 was delivered on April 15th to BR's first purpose built diesel depot at Thornaby (51L), with the intention to assist in the eradication of steam working in the Tees area. This new depot replaced Newport (51B) and Middlesborough (51D), having cost GBP 1¼ million, opening to steam during June 1958 on a seventy acre site, it comprised an octagonal roundhouse, the last built by BR and a through shed, suitable for use by the newly arriving diesels. It would close to steam on December 14th 1964.
Trial running of D5151 was with a rake of redundant LNER coaches, normal duties would comprise freight workings in the Teeside area.
Noted Darlington Works during August.
Noted Derby Works during July, in September 25001 moved to Gateshead (52A), which included trips on the Consett branch and across the Pennines to Carlisle (12A), which would be it's new home from December.
On August 23rd the 19.20 York - Birmingham New Street was worked by 25001 & 25012.
The 08.12 Derby - Yarmouth to Norwich and the return 14.56 Norwich - Derby were worked by 25001 & 25136 on September 28th.
During July 25001 was transferred from Tinsley to Eastfield, on July 14th the Perth - Edinburgh portion of the 16.35 Inverness - Glasgow was worked by 25001.
With all the Class 24s retired and a continuing surplus of Type 2s, the Class 25/0s became the next fodder for the scrapman. The first withdrawal for the sub group came in December 1975, however 25001 soldiered on at Eastfield for just under five more years.
25001 stands at Ayr on June 25th 1977. The locomotive still carries its number on the cab side (in true Derby style), but the blue star multiple unit coupling symbols are in the Glasgow style (inboard of the marker lights). Works attention in November would soon correct this anomaly. Other changes are the sheeting over of the gangway doors and the disappearance of the steam style shedplate. Also removed is the frame level valencing between the cabs.
25001 was noted in Glasgow Works early in November.
25001 stands at Polmadie on March 15th 1980, six months prior to withdrawal. This view of the right side of the locomotive reveals the two rows of air filters, three on top, four below. In contrast to the view at Ayr (above), the locomotive has been through Glasgow Works, getting a repaint, including the re-positioning of the numbers and data panel away from the cabside to a more centered position on the bodyside. And at some point the fuel tank has been fitted with a large circular fuel gauge.
On September 23rd 25001 was noted at Inverness.
On June 9th the 13.40 Glasgow Central - Carlisle was worked by 25001.
The first two weeks of April found 25001 stopped at Eastfield depot for an examination and body repairs.
On July 25th the 17.12 Aberdeen - Stonehaven was worked by 25001.
25001 was stopped at Eastfield depot on August 15th for wheel turning, two days later it was noted at Glasgow Shields Road depot where the wheel turning was completed (?).
On September 17th the 1T14 07.40 Aberdeen - Glasgow failed at Cadder Yard behind 40060, 25001 assisted the train on to Glasgow Queen Street.
Withdrawal came on the evening of September 25th 1980.
Passenger workings courtesy Alan Baylis (www.class25.info)
Page added January 15th 2001