Need wiring instructions for lionel pre-war 45n auto gateman. Thank you. Gerry

replace bulbs

Lionel#76 accessory is a pre-war item, so instructions for it are scarce. I suggest you read pages 12 - 26 of the attached pdf and hook up the #76 following the directions for one of the automatic signals.
http://www.slsprr.net/history/1954LionelTrainsAccess.pdf

Mania Trains in NJ has repro stamps for Pre-War trains...may have stamps for the boxes as well. Many of the stamps came from Jerry Butler....Excellent products

Olsen's trains in Ohio may be a second source

If it is the 1045 flagman, you need a replacement arm with the attached flag. disconnect the man from the metal base and open the figure with the screws on his back. Disconnect old arm or whats left of it and reverse the process to re assemble. If you do not have a 1045C contactor, one side of a 154C will work
If it is the 145 gateman the arm has a screw or drive pun into the man's shoulder. If you can get a seperate arm this is the way to go. if not parts dealers will have the complete man. Open the base undo the screw that holds the man to the arm remove damaged man, Reverse process to reassemble

see pages14 &15 of attached pdf.

http://www.slsprr.net/history/1954LionelTrainsAccess.pdf

Here is the manual for the switcher. http://www.lionel.com/media/servicedocuments/71-8474-250.pdf
Here is a link for gatemen, select the one you have to find the manual.
http://www.lionel.com/Products/Finder/SearchResults.cfm?doAction=search&Keywords=gateman&CategoryID=39&Gauge=&RailLineID=&CatalogID=&CollectionID=&searchWithin=Current
Here is the link for power supplies.
http://www.lionel.com/Products/Finder/SearchResults.cfm?doAction=Browse&CategoryID=40.

You can download instructions and product manuals at Lionel.com in their customer service section. If you don't find what you need, use the Contact Us link to ask for help. Lionel offers great customer support.

Here's a link to the Service Manual to the 252 Crossing gate.

http://www.lionel.com/media/servicedocuments/71-2714-250.pdf

You should be able to. The Lionel transformers all put out AC power, not DC and many Marx and American Flyer transformers will work too. The real question is total amount of power being drawn and whether or not you have the wattage to match your engine and accessories. With the CW-80 though, it should put out plenty. I run my pre-war 1666E engine pulling a full compliment of metal cars with no problems using a CW-80.

Have you changed transformers? You can also make a Lionel run in opposite direction by using the throttle control...just go to stop and then to power and then back to no stop and right to power. That often works.