1969 Autocar (I was told at least)

Cool old A-car ( or Car-Kars, we called them) I think this is a DC series, and the A series was a road tractor. The 1674 was the "small Cat", I knew a guy that had an IH with a 270 hp Cat and could dust the 290 Cummins I was driving, and the 300 Mack, they were good motors. The steering could be king pins or spring hanger bushings, or wheel bearings you have to raise the steer axle to check that. The White Corp. bought Autocar in 1953, and made it their flagship truck, so much so, all White trucks ( White, Diamond Reo and Western Star) all used that Autocar cab. Looks like tubeless floats on the front, I'd get rid of the "widow makers" on the back. Not much could kill these.

 

I used to drive a 75' Autocar day cab
1st truck I ever seen or drove with air ride suspension. Had a 13sp with DD 318
Solid truck that would run triple digits.
Really loved driving that truck. I was really pissed when my boss sold it and put me in a 81 kw coe, The Autocar drove like a Caddy, The Kw not so much

 

Autocars had a cool dash, this was very similar to my Western Star dash, and I believe they had an overhead console, for radio and such.
http://forums.aths.org/InstantForum2010/Uploads/Images/84e6d2a6-7e06-4666-a610-c865.jpg

 

I worked on some a bit newer than that and owned a 4000 White. Same cab as mentioned. The 4000 had circuit breakers in the dash. I thank in the center but maybe to the right side. Do not be looking for a big box just a few breakers.
Your power steering is surely air assisted. The joint with play in it is the control valve with air lines attached to it. Some of them go to cylinder connected to cross shaft between the tie rod ends? They normally had a switch on the dash ( City - Highway? ). Is turns the air off for HWY and cuts it on for parking lot.
No help on diagrams here but if you have a question one of us maybe able to help.
In the center up high. You have to take a panel off to get to them as best I remember.

 

Had them a few times. Not much to them, hop in and get it moving. But you discover real fast what they don't like and like. Example getting into a parking lot. Need Popeye on the wheel.

I cannot talk to the contents of those things, only one had everything necessary to run them well, the rest of them were missing panels and such. Not very well kept. As long they passed the air test alls well.

 

You think this has air assist steering? Maybe, but of all the trucks I drove, only one had air assist steering, a Mack, and I didn't like it one bit. Backing in with lots of turning, you could use all your air before hitting the dock, and have to wait. I don't recall a switch for on/off. I'd have to think this is hydraulic steering.