by WP Mechanic
Looking for anyone that can direct me to a copy (pref. digital) of an ALCO 251 Inline 6 manual, or even an S6 service manual. Please contact me off list. Thanks.
electricalwilly wrote:I'll take you up on your offer alcoman. If your still offering .. I'd like some wirung diadrams for the s-5 or s-6. Would like to look at excitation system diagrams if you got'em.I have wiring diagrams as well as manuals for the S-6-both parts and maintenance. Contact me off list. Thanks.
locomotive112 wrote:I am looking for manuals for the controls and electrical system of the ALCO DL535E and also for their ALCO 251D 6-cyl engine.I can help you with the engine materials, but I am not sure about the electrical system. The closest thing I have would be for the HR412 which is rated at 2000hp.
These locomotives were built in 1981 for the White Pass & Yukon as 1500HP (yes I said 1500 not 1200) road switchers in the #111-#114 series.
I am looking for electrical system manuals ( mainly for the control stand and their connections to the governor) (PG governor?) and the MU wiring to the 26L brakes.
I basically need every manual I suppose. Other than the smallish 6-cyl engine, the wiring and manuals should be typical ALCO/MLW of 1980+ vintage.
Allen Hazen wrote: There is a string on this (Railroad.net : Alco) forum titled "Odd Canadian GE generators" which has raised the question of when GE's "static excitation" control system debuted: we know that Alco's 251-engined road switchers (introduced 1956) had it, that MLW's 244-engined RS10S (introduced 1956) had it, that later GE-electricaled F-M units (starting1956) had it, but the question is whether it was trailed earlier on smaller units: in particular, on the early units powered by 6-251 engines (S-5 and the narrow-gaugeunitsbuilt by GE for the White Pass and Yukon).In respect of the WP&Y GE “shovel-nose” units, electrical equipment details for the 1963 batch were given as: GT-584 main generator, GMG-158 belt-driven combined exciter and auxiliary generator; GY-24 mechanically-driven second auxiliary generator to supply the TM blowers and radiator fan motors, and six GMH-842 TMs (apparently the last-mentioned were drawn from GE’s mining equipment range.). This is from an article in Railway Gazette 1963 November 15. I think it is a reasonable assumption that the Alco 6-251 engines were fitted with Woodward PG governors, but whether it was the version with integral load control rheostat or not is unknown. In fact, whether these locomotives had a load control rheostat at all is unknown and not easily assumed either way. For its smaller locomotives, GE was fond of using the 1924 Lemp inherent characteristic form of load control, for example on the 70 ton and 50/52/54 ton ranges, and also on the small, Caterpillar-engined export Universals. One might well say that this was a form of static excitation control, although clearly not within the spirit of the way this term is normally used.