GE Evolution Series phases

[trainiac]

With the Evolution series having reached some maturity after going through a number of production variations, and with my search for phases unanswered, I tried my hand at making phase descriptions of my own. These are based on all the uber-nitpicky stuff I've picked up making drawings of these units.

Phase 1a
* Hood vents near aftercooler: 2 small horizonal rectangular vents in bolted panel, 3 doors with vertical vents
* Rooftop access panels near aftercooler: 2+3 hinges
* Hood access panels near aftercooler: square latched panel next to small bolted panel (fastened to hood door underneath on right side)
* Radiator intake: small vertical bar behind screen
* Front inverter cabinet panel: 14 bolts, no hinges (AC versions only)
* 6 grabirons on left hood side
* Rear fuel filler mount: absent unless fuel filler present
* Rear hood doors: flush
* Radiator grills: flush
* Aftercooler: flush rooftop grill
* Rear headlight: vertical (several forms)
* Rear hood end door

Phase 1b
* Hood vents near aftercooler: 1 large vertical rectangular vent in bolted panel, 3 doors with vertical vents
* Rooftop access panels near aftercooler: 2+1 hinges

Phase 1c1
* Hood access panels near aftercooler: 2 hinged latched panels, square intake, angled forward edge
* Radiator intake: wider vertical bar on top of screen

Phase 1c2
* Front inverter cabinet panel: 12 bolts, 2 hinges on right side (AC versions only)

Phase 1d
* No grabirons on left hood side

Phase 1e
* Rear fuel filler mount: present, with or without fuel filler

Phase 1f
* Aftercooler: raised rooftop box

Phase 2a
* Hood vents near aftercooler: 5 doors with vertical vents
* Rooftop access panels near aftercooler: no hinges
* Hood access panels near aftercooler: 2 hinged latched panels, no intake, angled forward edge
* Rear hood doors: raised, beveled edges
* Radiator grills: raised, shorter wing section
* Aftercooler: longer wing section

Phase 2b
* Aftercooler: flush rooftop grill

Phase 2c
* Hood access panels near aftercooler: 2 hinged latched panels, no intake, vertical forward edge
* Rear headlight: horizontal
* No rear hood end door

Other details
* Numberboards and headlight: Cab- or nose-mounted.
* Trucks: Hi-Ad on DC versions; Hi-Ad or radial-steering on AC versions.
* Dynamic brake intakes: in 1st and 3rd openings on all DC versions; in 2nd and 3rd openings on AC versions with 2 intakes.

[MEC407]

Thanks for compiling this info!

[mille-ryan]

Not sure if you new or not but a lot of those rad and grate changes are because of the different cooling system setups on the EVOS. The early ones kinda sucked and werent much fun to work on. The later units are much better.

[Engineer Spike]

The radiator changes were because the early ones had dry rads. The water only circulates to them when cooling is called for. The newer ones have the water constantly circulating through the rads. The new fold down door on the bottom of the radiator wing is where the sight glass is.