PNR 900 class

The GE U14C and U15C are second-generation Universal Series road switchers specially built by GE Transportation for the Philippine National Railways. These were ordered in the 1970s to augment and eventually replace the aging diesel locomotive fleet purchased by PNR's predecessor, the Manila Railroad Company.[6] The locomotives to be replaced include the 1000 class streamliners and the 2000 class roadswitchers, the latter being a first-generation Universal Series locomotive and both entered service in 1956.[7] Despite the earlier diesel locomotives initially having 4 digits, the numbering scheme for the new 900 class has three and seems to follow the numbering scheme of the Manila Railroad 800 class USA locomotives built 30 years prior.[8]

The first batch of five GE U14CP locomotives was ordered in 1973 for ₱10 million (equivalent to US$9.07 million in 2021) and were constructed by GE in Erie, Pennsylvania. The last two units were delivered on February 1974.[9] A second order of ten U14C locomotives were ordered in the late 1970s and were also built in Pennsylvania. This second batch arrived between January and February 1979.[4]

The locomotives were used on various express services throughout the PNR network such as the Amianan Express and the fifth Bicol Express.[6][10] Locomotives used on the North Main Line locomotives are distinguishable from its southern counterparts by the color of the "whiskers" on the cab, with the former being colored white and the latter being colored light yellow. At the same time, the long-distance coaching stock were given a dark green and yellow livery to suit the locomotives.[11]

The last six locomotives (DEL 917 to 922) were built by GE in the former Montreal Locomotive Works plant in Montreal, Quebec, Canada. They entered service in 1992 together with ten 5000 class locomotives, and had a red paint that will be later incorporated into the Philippines 2000 livery.[12] At the same time, earlier locomotives such as 902 were repainted in the same paint scheme.[13] These locomotives were mostly used for Metrotren commuter rail services in the 1990s until the late 2000s.[12]

This section includes the last liveries they were last seen using in the case of scrapped locomotives.

• On December 31, 1983, DEL 905 and 910 collided between Tagkawayan and Hondagua Station. Both drivers were given Line Clear Certificate by the Station Masters in both stations (905 was heading Northbound while 910 was heading Southbound)
• DEL 908 reportedly hit an NPA officer's son in 1989. The officer retaliated by targeting Unit 908 on several occasions, throwing stones, firing bullets, and even hurling a grenade which detonated and injured crew members. PNR officials have renumbered Unit 908 as Unit 916 to avoid further attacks on the locomotive.
• DEL 912 was bombed by the New People's Army during the tenure of the late President Ferdinand Marcos in the 1980s. The locomotive was written off.
• DEL 920 collided with a dump truck while travelling to Legazpi in 2001. The locomotive's chassis was twisted, causing damage beyond economical repair.[15]
• DEL 922 was involved in the Sariaya derailment on November 12, 2004. The Manila-bound Bicol Express train derailed and fell into a ravine, killing 10 people and injuring 160 more. This later ordered for a total halt for all intercity services of the PNR until 2011.[25]
• On October 26, 2012, PNR Unit 922 hauling coaches servicing as Bicol Express Train 611 rolled over while traveling on a rainy weather in Sariaya, Quezon. The bridge was washed out, causing the coaches to roll over. The rainfall was caused by Typhoon Son-Tinh (known as Tropical Storm Ofel). As a result of the incident, 5 passengers were injured. As a result, the Bicol Express was suspended indefinitely although intercity services continued until 2013.[26]
• A man got run over by DEL 917 at the Abad Santos Triangle in Tondo, Manila on October 2, 2019. The man died as a result of the incident.[27]

• 
  PNR DEL 919 with its third service livery hauling 7A-2000 class cars at Tutuban station.
• 
  PNR DEL 916 (formerly 908) with its fifth service livery at Posadas Crossing near Sucat station.
• 
  DEL 921 in MRail Blue livery hauling 203 series coaches near Santa Mesa station. Today, 921 is wearing the orange livery.
• 
  PNR DEL 917 with its sixth livery (nicknamed Ponkan by local railfans)[28] at España station.

• PNR 2500 Class
• PNR 5000 Class