What do inj pump ID numerals/letters represent?

Tx Jim · May 10, 2019

Injector pump technicians I have a question. What do inj pump ID numerals/letters represent on Roosa-master DBGVC429 BAJ or 4AF? Do these pumps require different timing locations?
Thanks,Jim

Dieseltech · May 10, 2019

DB means B execution of two plunger D pump with .920 rotor, G-mechanical flyweight governor, V= vertical mount, F= flange mount, C= clockwise, CC= counter clockwise rotation, 4 means four cylinders, 29 means .290 plunger diameter, next number is a spec number, letters are accessory code. AF is on fixed phase, no advance pumps, AE is on pumps like IH 460,560, and 660 with light load advance, AJ is on pumps equipped with speed advance. AL is seen on speed advance pumps with electric stop solenoid. Timing always needs to be checked per the service manual, or spec sheet may have it too but not always. JD 3010 and 4010 used AF, no advance pumps from factory, but a field update to AJ speed advance for better starting came out later. A different flywheel timing used for the AJ pumps. DC and JDC pumps have four plungers, DM pumps can have two or four depending on fuel delivery needed.

Tx Jim · May 10, 2019

Thanks for reply. The IP in question is on a '66 JD3020

Dieseltech · May 10, 2019

All 20 series, 30, 40, and 5020 used TDC timing. The 3010 AF is 10 degrees BTDC, WITH advance 4 degrees. 4010 AF is 14 degrees BTDC, WITH advance is 8 degrees.

JDEM · May 10, 2019

The "D" stands for "die-cast." The "B" is the basic pump model/generation.

Roosa invented the distributor pump in 1947. First models were sand-cast housings and called "Model A."

Model A pumps were made until 1956. Then production of the model B and D pumps began. Model B still used sand-cast housings and model D
used die-cast housings.

In 1953, CAV purchased rights to copy the American "Roosa" pump and make their own version for use in the rest of the world.

For a long time there was an agreement that American equipment used Roosamaster and never CAV when sold in the USA. Obviously that deal
ended at some point.

John Deere - as I recall - was the 2nd tractor company to use the Roosa rotary-distributor die-cast pump. That was on the 1960 1010. I
think Hercules was the first to use it.

JDEM · May 10, 2019

In reference to the first distributor pump John Deere used on a tractor.

1960 1010 with a Roosamaster pump: DBGVC429-1DH

D stands for die-cast housing
B stands for pump model
G stands for the governor
V stands for vertical mount
C stands for clockwise rotation
4 stand for four-cylinder engine application
29 stands for .29" diameter pump plungers
1DH is the option package

Tx Jim · May 10, 2019

Thank you for the very informative replies.
Jim

Dieseltech · May 10, 2019

Hercules was probably first, IH 350 with the Continental GD 193 had the RoosaMaster pump in 1956 or 57, and the 460, 560, and 660 all had the pump in 1958 as did some Ford 144 and 172 engines.

Crazy Horse · May 10, 2019

Texas ..... some good replies here for you. Funny that some guys reply with a whole stack of good info and take the time to do that but,
because they haven't read any other replies, someone has already said the same thing. Happens all the time. Well, the important thing is
that you got what you asked about.

Tx Jim · May 10, 2019

Crazy Horse
Oh well as long as info is correct it's appreciated.
Jim

JDEM · May 10, 2019

If you are referring to my reply, I certainly DID read the prior posts. I added some new information that was not other posts. At least not in this thread. Who exactly are you referring to, who you claim is not reading the posts fully? I figure it is easier to ask rather then sit here and try to guess.

JDEM · May 10, 2019

I read mention somewhere of Hercules being the first, but cannot cite a model number. The idea of a distributor pump - at least the first one - should of seemed pretty far fetched. I still find it amazing they last as long as they do. Take the example of an 8 cylinder engine. If it uses an in-line setup - each cylinder has its own pump. At 3000 RPM, each pump is operating 1500 times per minute. Now - with the same 8 cylinder engine with a distributor-rotary pump? The central plungers operate 12,000 times per minute if my math is correct.

Crazy Horse · May 10, 2019

Well JDM, I don't want you sitting up all night guessing, that wouldn't be fair, you probably have better things to do. I was referring to your and someone else's replies regarding the answer to the original post ..... "What do inj pump ID numerals/letters represent?" I believe there was an earlier post by Dieseltech that gave the same info with regards to the original question about the numbers & letters. I wasn't referring to anything else, you did add some extra stuff. Anyways, correct me if I'm wrong.

Bob Bancroft · May 10, 2019

AC D17D 1957

JDEM · May 10, 2019

My point here is why mention this the way you did, unless it is a complaint?

You stated . . " they haven't read any other replies ."

You have also now made it clear "they" happens to be me.

I know in my case, I read ALL the replies and added to the pool of info already posted. Not just a repeat of what was already posted. Seems if anything, perhaps you did not read all the replies as to their content?

The way I see it - many people take the time to be accurate and contribute info here - obviously at "no charge." It costs nothing to read it and it is beyond me why there are complaints like this. It reminds me why I spend less time on forums now adays.

Dieseltech · May 10, 2019

Yes, RoosaMaster/Stanadyne, and the CAV DPA are both good, simple pumps compared to inline pumps, and the opposing plungers are busy on an eight cylinder engine. What does help them live is in most applications each plunger at full load delivery moves .040 inch or less. Inline pumps have the advantage when higher full load fuel delivery is needed, and will last 10,000 to 15,000 hours with normal service. Rotary pumps with the same care need service in most cases 2,500 to 4,000 hours. Good clean fuel, with no water or dirt will add life to any fuel system. Any pump that comes in for service I ask, how does engine start when HOT? Hard starting hot is a good sign the hydraulic head is getting worn internally.

Crazy Horse · May 10, 2019

Well, there certainly are a lot of other things to do if a guy walks away from forums. Most of us probably spend too much time behind a computer screen to begin with in the first place. So, occasional posts that get under a person's skin can have a positive result.

Scott 730 · May 11, 2019

(quoted from post at 20:33:58 05/10/19) My point here is why mention this the way you did, unless it is a complaint?

You stated . . " they haven't read any other replies ."

You have also now made it clear "they" happens to be me.

I know in my case, I read ALL the replies and added to the pool of info already posted. Not just a repeat of what was already posted. Seems if anything, perhaps you did not read all the replies as to their content?

The way I see it - many people take the time to be accurate and contribute info here - obviously at "no charge." It costs nothing to read it and it is beyond me why there are complaints like this. It reminds me why I spend less time on forums now adays.

JDEM, when I was getting ready to re seal the pump on my 4020, the info I found in the archives here proved invaluable. The archived posts by you, Dieseltech,Al Baker, Tim S., and others was a great help to a first time pump repair novice.
It can be tough to put up with some of the keyboard commandos here at times, but your expertise is greatly appreciated by me at least. Thank you for all your contributions to the forum.

What do inj pump ID numerals/letters represent?

Tx Jim

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Tx Jim

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