Nice lookin scraper.

Thought you said it was a model 77F-420 (650)
Which is it????????

According to Cat 1986 serial/ product identification index, 77F is serial number for 650, 660, and 666 tractors. It appears that serial number of scraper would define actual model. Serial number for 650 scraper is 22G, 660 18G and 666 20G

Hello Old Magnet,

I had some one post a comment on you tube stating that the tractor for a 650 & 660 are one of the same. He stated that a 650 bowl had the 39" rubber on the rear and the 660 had the taller 51" rubber. This one has 51". I do know that the widest part of the scraper (draft tube) measures 14'-2" (wider load). I'll try to find some #'s on the can to identify. Yes, the 77f-420 is the # on the back of the tractor by the transmission.-glen

Could very well be you have the 660 combination......40yd struck/54yd heaped and I show a width of 14ft-4 in. What was your weight? I show about 108,300 lbs for the 660.

I asked the trucker if he weighed it, but he didn't. The axle combo he had allowed around 160,000#'s so he didn't bother. The smokies at the scales let him roll right on through. You know the last time we I came down to Tulare the scales in Cordilia gave me the red light:mad: . I hate when that happens. Your palms start to sweat, get dry mouthed waiting for that loud speaker to blast for you to pull in for inspection, and the I got the green light:D The smokies just wanted to look @ some cool iron on a old Mack.

I envy you guys over there. If you pulled out of a yard with a truck loaded like that here in Australia you wouldn't get ten feet. The smokies here would lock you up and throw away the key. Transporting large gear is a real pain and requires full length trailer with twice the capacity you state also need special permit from roads police and another from normal police plus at least two escort vehicles with flashing lights.
Wish my wife would like a new garden ornament just like that. Looks like lots of fun.
Oz22

In the early 60's, I worked for Christianson Construction out of South Dakota. They had 2 6-wheelers, several 641's and 2 631 scrapers. I was on an 834, rubber tired cat pusher that weighed 113,000 pounds. They had 5,000 pounds of lead in each tire. We usually double-headed to load them or used one of two Quad-nines. I told one of the scraper hands that I thought I knew how to load him with just the 834. I told him when he got a chance to try to come to me when no other pushers were close. I told him if he stopped me it was hard to climb out of the holes the tires would dig. I said if he would keep just enough pan in the ground to keep me to a crawl, but not stop me I could load him. He didn't believe it. Well, it happened. I picked him up and he kept me real slow and I boiled him over. Afterward he couldn't believe it. One D9 couldn't do it.
The old guys on tracks didn't like that that 834 could push them around.

7U, your toy is really nice but your wife is even nicer for letting you get this monster.

Hi, Glen.
That is one very nice garden ornament and I sure did enjoy loading it at the show. Thanks for taking the time, expense and effort to bring it there and get it back.

I once worked on a job here in DownUnder where there were 3 x 660B's running with a Komatsu D455A dozer pushing. In the early stages of the job, they had been using a Cat D8H 46A, 270hp model, to load them. I was running an O&K G350 grader on that job, 42 tons and 380 hp, with a push block on the front and it could load a 660 better than the D8H by quite a bit.

I later worked on another job with those same 3 x 660B's when they were being loaded by a D10N and sometimes a D9L. The D10N had a slight edge but the D9L wasn't far behind.

Thanks again for bringing the 660 and for all your efforts in getting the show together.

Just as a side issue, on the Friday afternoon, I was running Ed Akins' Cat D7 for a while and pushed Claney Suffield on the D6 9U and can a number of times. I was pushing him mostly in 2nd gear, picking him up on the run. Claney was doing something that I have only ever seen one other Cat-and-can operator do. He would be down in 1st gear by the time I picked him up and he would use the D7 's power to keep him rolling while he changed up into 2nd to continue loading, then let me keep pushing him after he had loaded and got the bowl out of the ground while he changed into 3rd for the run to the dump area. Great stuff, Claney.