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Lot of push power. The scraper operator could put both transmissions in neutral and the old 9s would still load it with no problem. I strongly believe that, anyway, but I could be wrong.

Back in the days , their was a holland loader that was 2 D 9 s attached in a frame with a vertical dirt wall trimming blade for operating in circles with a conveyour belt and its own engine atop to run the belt , load out large belley dump trucks of 120 ton of dirt or other material , .

Wouldn’t the safety and environmental weasels have a fit , if they had been around then , we’d still driving on wagon trails..😮

Pros tag on the fly , a little riskier in rocky material , but it can be done , saves fuel and cycle time

Just an observation, Are these units straight pipe exhaust ?? I remember the muffler assembly above the engine hood back in the day

!@**..

I saw the Quad 9's operating in the late 70's near Merced, CA. Front 2 had 9 foot riper shank. Back 2 were pushing. When turning 1 and 1/2 foot would not even come out of the ground. The ground rumbled like a constant earthquake from 1/4 mile away. It was awesome!

dont look like D9's , more like D6

Talk about a quick fill up.

أللهم صل على محمد وعلى اله وصحبه وسلم. ١.١٤٤٥

try that with two D11s , now that would be some thing.

I ran a double 9g just like that

That’s the way to load scrapers 2 nines up there arse

Eculid

Been a pusher with D8 to Exclude 18 's & 24's on chalk in Kent waybackvwhen ,I have seen a tandem set up but pushing a E24 even with a then modern D8 took serious grunt and was very slow. This/these would have been the kit to have!

Mantap keren ni

Cool machine looks like a brute👍🇺🇸🇺🇸

Mechanics didn't have to fix no damn A/C system either, when operators were real men

Хорошая техника, хорошая работа. Пока сущесвовал СССР работал на скреперах. Удовлетворение от проделаной работы. На работу ходил с радостью.👍👍👍✊🤚

i wonder how steering works when they're connected like this

Western Construction had these Quad 9's pushing 631's building Hwy 80 in Wyoming in 1969. I was quite young and I went there with a friend who was looking for a job and I got on a DW-21 water pull. Later back home Peter Kiewit used a similar Quad 9 along with a single 9 to triple push 651's building the Dana Point Marina in 1970. An old black fellow named Riley Brown ran it, and I was on that job running a 651 Scraper. A good memory.....

great film! brings back memories of working on i-80 in iowa early 1960's running a d-9 pushcat , no air condition cabs in those days ! we were lucky to have an umbrella!

Very interesting to see such engineering skills of people in the old days

Just awsome 👍👍👍🇬🇧

How much H.P with the 2 9,s?

Speaking of power, I was on a 657E for Independent, and the 651 spread was single and double pushing with D10T's. I'd cruise by and often they'd be sitting, so I'd drop in the 51 cut and get a quick pushed load. On more then one occasion I/we were loaded with a triple 10T push! With that much power, just hog, boil, and go. I took some pretty impressive photos too!.....

Peter Kiewit had a pair of Quad 9's on their Dana Point, CA marina job around 1970 or so. It was operated by an old black guy named Riley Brown, and he had an umbrella just as pictured. I was a young scraper hand and the boss put me on the jump seat next to Riley to let me see how he ran it, but I never got the chance to do so. Bummer! They were triple pushing 651's and we had a flat out, bladed and bee gee'd haul road and we sure moved a lot of dirt!.....

Before I retired last, I hd a customer that i moved for maybe 25 years. Still uses Cat 21 scrapers with cable controls. He has a D9L and a D8H that has a pony motor to Start it. Everything is in tip top shape

2009. Kentucky Speedway Parking Expansion. Sparta, KY. Due to maintenance issues and parts rarity, they were taken out of service a few years later. We bought them in the early 70’s so got many years out of them. I think they were the last set still out working. Thanks for all the comments

Where was this at?

That is one interesting configuration. I bet it was a fun one learning how to steer it.

DD9G 1965-1980

Yo soy operador de bulldozer Y me da vergüenza ver ese pobre operador con una sombrilla en la cabeza porque no le ponen techo casetilla

Everything just open cab, no air con. Must’ve got so hot doing that all day.

Caterpillar machines rule the earth 🌍

I remember dad talking about working nights in page az. Running quad 9s he worked in most of the 50 states and canada from the fortys to the eighties RIP dad

I love seeing these old machines next to new ones. I worked on a job/for a company that ran 67-72 Clark 290m right next to the newest (2000) John Deere 8-wheelers with Miskin cans. Funny thing is the Clarks beat that setup in every way but air conditioning!

That’s no where near a D9

How did that happened when there is only 1 driver on D9?

I like ur canopy.😁👍👍

They're quad nines

An amazing piece of engineering but I can't help wonder if there's an unemployed "cat skinner" standing way off to the side cursing under his breath.

, nice work, greetings one Chanel from Indonesia 👍

I ran d9 like this for year best days of my life

Nice pair...

Great machines. Wish they were still working.

👍👍👍👍

My god theres a long day. Good thing the dirt is wet and no wind blowing.

A very cool machine to operate, I saw this on the cut in the Hill project at the end of the 80's by Harper Constitution.

Is it just me or does 4 motors loading dirt seem excessive. Guess diesel was cheap once upon a time.