The M-636 is a six-axle, 3,600 hp diesel locomotive marketed as part of the Montreal Locomotive Works six-axle "M-Line" series of locomotives. It was an evolution of the ALCo C636, and it saw many sales to Canadian, Mexican and Australian customers. Today, there are a handful M-636s left in revenue service.

CN 2301 (M636 built 1970). Built by Montreal Locomotive Works. At 3600 HP; a powerhouse freight diesel in its time, at 3000HP with 6 wheel trucks and 75mph gearing MLW units made a burbling sound when idle, a racket when running and smoked a lot.

CN 2306 (obviously overhauled meanwhile) and a SD-40 are switching autoracks to take to the loading facility outside of Dartmouth. Dartmouth, Nova Scotia in March 1993. Marc Simpson photo.

CN 2329 : Description: On ready tracks at Triage Taschereau. CN's M636s just might qualify for the title of "coolest engines ever" in my book. Photo Date: 8/10/1993 Upload Date: 5/20/2008 7:49:38 PM : Location: Montreal PQ, QC : Author: Mark Jacob: Categories: Locomotives: CN 2329(M636) Views: 979 Comments: 0

CN M636 2238 that was kept as a Y2K power unit and had been stored at CN's Macmillan Yard for several years until it was sold last Spring. It took some time to be authorized for movement. History: CN M-636 2338 is a class MF-36b and was built in 1971 by Montreal locomotive Works.

Derek Henderson photographed brand new MLW-built CN M636 2335 and five decorated CN freight cars on display at Belleville, Ontario, during 6218's retirement party in 1971. The cars stayed painted this way until scrapped.

CN 9506(GP40-2LW) CN 2306(M636) CN 2328(M636) Views: 850 Comments: 0: Title: GMD leading : Description: Its leading an SD 40, and an MLW, or course. This was one of maybe three GM units we saw on CN that day. This train is eastbound for the port at Halifax. Photo Date: 10/1/1989 Upload Date: 12/2/2015 5:00:16 AM :

Three CN M636's move an e/b at track speed through Dorval, Quebec on a nice summer day in 1983. A westbound extra-note the white flags, common practice in Canada-rolls through the Royal Botanical Gardens as it makes its way out of Hamilton and onto the Oakville Sub. How about that spreader tucked in behind the power??

stripped for parts to repair stationary engines — cancelled?

Feb 16, 2009 · The M630/M636 and the Alco C630/C636 were very low production units with lots of electrical issues in the control cabinet, and even to things like the traction motor blowers, and the central air intake gear.