Here's some answers to your questions:

1. The engine is an Oliver/Waukesha. The HC version was 193.9 cubic inches. Overhaul parts are readily available from sources such as <!-- w --><a class="postlink" href="http://www.korvesoliver.com">www.korvesoliver.com</a><!-- w -->

2. There are 2 serial numbers on the 77. The main one for the whole tractor, which was placed on the transmission housing in front of the right brake housing for early models, and then was moved to the lower part of the dash for later models. The other serial number was the engine serial, which should be stamped into the rear flange of the block, right above the rear motor mount bolt.

3. I guess that one would be a personal choice. They do crank over better when switched to 12, but if you're going for originality, stick with the generator. (Diesels were always 12 volt, and all 77s were positive ground.)

4. 5.50-16 and 6.00-16 were the two sizes available when they first came out.

5. Dumont's Decals, <!-- w --><a class="postlink" href="http://www.oliverdecals.com">www.oliverdecals.com</a><!-- w -->

6. The green changed about halfway through the production of the 77. Early ones were a little darker, later ones would have been the same color as your 170 spreader. Post your serial number and we can tell you which color yours should be. And as always, it's your tractor, you can paint it any color you like.

7. Some info is available. There are no known serial number lists, so I couldn't tell you the exact year of a plow, but I can tell you what time range they were made in. The most likely plow to go with that tractor would be the Plowmaster 100. Pictures are the best way to identify a plow, as there were so many different models made by Oliver.



If we can be of any further help, don't hesitate to ask.