Cat No. 40 Scraper

[ubucat]

I recently purchased a D4 7U Serial # 41417. After reading numerous posts on this board, I have learned that is was set up to pull a scraper. It has the #44 hydrualic unit with 4 lines to the rear and the hood mounted surge tank. It has a diverter valve to change oil flow from the dozer to the 2nd rear remote. This machine is also a factory direct electric start with 24 volts.

I am interested in aquiring a #40 scraper for it and have located one locally. What is price range that these go for?

[Rd6 plower]

Any where from $1200-5000. My buddy paid $3000 for his. Now does your 7u have a factory 5 roller track frame also? By any chance do you think you could post a picture?:D

[Old Magnet]

I don't know about the actual selling price but I have seen asking price as high as $10,000 and a typical range of $5,000 to $7,500. They are a very desirable piece and if they are available on the open market price will surely be high. If you can snag one for a reasonable price I'd jump on it. Especially if your already set up to utilize it.

[7upuller]

I paid $3000 for mine as RD-6 stated above, but the tires were bad. The cylinders and hydraulic lines were also bad. Tires are the biggest repair cost.-glen http://picasaweb.google.com/7upuller/ChapterFivePlayDay09#5411806219675417106

[ubucat]

My D4 is a 4 roller track frame, I wish it was a five roller. It has a 4A dozer and a Safe-T-Cab ROPS has been added to it. I think the neighbor paid $1200 for his 40 scaper 6-7 years ago at a farm auction and intended to pull it with a wheel tractor. It had some tire issues also. He has never really used it, so I might be able to buy it from him.

[Old Magnet]

Is your Safe-T-Cab a two post type? Got one of those myself.

[ubucat]

Hopefully, I have attached a photo of my D4 with this message. The Saf-T-Cab is a 4 post unit. Was the dry air cleaner an option on the later 7U's?

[OzDozer]

ubucat - Cat offered conversions to dry-type aircleaners in the late 1950's, for the D6 to D9 tractors, some of the larger traxcavators, and the Cat 12 grader.
However, I can't find where D4 7U's were ever included in the dry-type conversion offers.
The "new" D4C was the first D4 offered with dual dry-type element aircleaner, in 1960.
Your tractor appears to have been converted by the installation of a later dry-type aircleaner off a later Cat .. possibly a D4C.

The #40 scraper is a rare beast, and OM's values are more in keeping with what they bring, in good shape.
You might get one cheap, if it needs new tires and hyd repairs .. but by the time you've outlaid the $$'s on tire and repairs, you'll be out of pocket to the tune of what good ones sell for. There were less than 700, #40 scrapers built, as I understand.

[Old Magnet]

The #40 Parts Book I have indicates the serial numbers went from 1W5001-1W5779.
Dry filters for the D4 were a Donaldson Filter Co. aftermarket add on.

[ubucat]

Old Magnet - Thanks for the info on the Donaldson filter setup. I have attached pictures of mine. Notice the radical bend in the throttle linkage and the reinforcement, obviously an add on. I appreciate all your help in figuring out the equipment on my D-4.

[Old Magnet]

Yes, that linkage is pretty radical:) :)
There are a couple of down sides to the dry filter.
1. Most installations, including mine, can be real knuckle busters as there is not much clearance for the levers and fingers.
2. Dry filters have a shelf life to them where the sticky stuff that aids in filtration tends to dissipate in time to where it becomes more of a screen than filter. Need to keep track of installation date. The filters are also kind of pricey.

If mine hadn't come with the dry unit I'd just a soon have the original oil bath filter.

[D4Jim]

Speaking of Donaldson, I don't know where I came across this but they made an early pre cleaner. I probably swiped this from OM!!

I guess I am old fashinoned like OM and like the oil baths.

[CR]

The dry filter housings for the 6U and 7U came in a kit that our dealer used to carry. The dealer also had a kit for the d6 & d7.

This was back 30 years plus, I doubt anyone there would even know where to look today for all the components.

The filter housing, or at least the one provided by our dealer came right from the D4C.