Rebuilding an injector pump

[Frankinfl]

My experience has been different. But I do not have any financial gain involved.

 

[Dieseltech]

My experience has been different. But I do not have any financial gain involved.

Then you got lucky, I had a Ford CAV DPA PUMP last week that had the same hard starting when hot trouble, and a Stanadyne/ROOSA JD 4020 pump this week that both need the head/rotor assembly replaced. Poor fuel filter care can wear the rotor and head bore quickly causing the internal leakage. The vane pumps are designed to move much more fuel through the pump for lubrication and cooling than the engine actually needs to run.

 

[Goose]

Forget doing it yourself. I'm guessing you don't have the proper equipment and SQUEAKY clean work place to do it. I need the Roosamaster pump done on an Allis Chalmers D19.

I once took a class in diesel injector systems at our local community college, and rebuilt a Roosamaster pump during the class. The instructor actually had us students assemble the pump holding our hands and the parts submerged in diesel fuel to keep the acid on our fingers from contaminating the precise surfaces in the pump.

At the moment, I'm waiting to see if the Diesel Dept. at the college will rebuild my pump. Sometimes they take projects like that for students to do. The students do the work, but they're graded on it and the instructor makes sure it's done right.

 

[Fritz Maurer]

The injector pump is on an Oliver 88 with a super 77 engine. The injector pump is a roosa master 635
I called a local Oliver parts dealer that I do a lot of business with and he said he has a completely rebuilt roosa master 633 for $1000 or $800 if I give him the core. Does this sound reasonable?

I really don't think you're going to do much better than that.... the last head assembly i bought was about $700 , and that was a decade ago.

 

[John Deere D]

Hello all I have a roosa master Injector pump that has pressure issues. I can't start the tractor without pull starting it and I can't bring the engine to an idle without it dieing. So I want to rebuild it but all the shops around me either don't want to mess with it or they want a high rate to work on it. So I thought I could rebuild it myself. the mechanical part does not worry me. But I'm not sure what all goes into recalibrating the pump.

Do you guys have any input? Thanks

Send pump to a professionally trained FUEL pump specialist:
I have all my later Grand Fathers Medical Surgery equipment,and his medical books............I sure as hell would not remove someones innards!

 

[Frankinfl]

Then you got lucky, I had a Ford CAV DPA PUMP last week that had the same hard starting when hot trouble, and a Stanadyne/ROOSA JD 4020 pump this week that both need the head/rotor assembly replaced. Poor fuel filter care can wear the rotor and head bore quickly causing the internal leakage. The vane pumps are designed to move much more fuel through the pump for lubrication and cooling than the engine actually needs to run.

Of course you have seen bad pumps. But if they all needed heads and rotor there would be no core pumps to rebuild. The rotary pumps are simple robust pumps that mostly need simple repairs.
Why do you not want people to fix any problem with there pump?

 

[G1000VISTA]

Rebuilding pumps is expensive . There is a guy local that has a pump shop that gets pumps in from all over the nation and ships them back out. He's over on Red power under cihtech. Real stand up straight guy that has forgot more then I'll ever know about pumps. I would send it to a shop somewhere and pay the cost. You do it and something wrong you have to eat it. They mess it up , they eat it.

 

[Dieseltech]

Of course you have seen bad pumps. But if they all needed heads and rotor there would be no core pumps to rebuild. The rotary pumps are simple robust pumps that mostly need simple repairs.
Why do you not want people to fix any problem with there pump?

They can do whatever they want with it, no skin off my nose. You would be surprised how many I see on occasion that come in after, "I've had it apart three times and it STILL won't work!

 

[used red MN]

Reach out to diesel tech on here before you do anything.

A. M. you can contact Dieseltech through the YT private message system called “Conversations” by the software. To do this click his username by his reply and there you will see “Start Conversation” click that and it has a form that looks very similar to how it did when you created this post. Fill that in, this will be private message between him and you. When he replies a number will show up by your envelope/mail symbol. You click the envelope to see the “conversation”/message and then reply to him there again in private. Do not check “Lock Conversation” that will shut off anybody’s ability to reply. That is just a hard stop if it is ever needed.

 

[M-MAN]

I see a misconception in the posts. With a diesel injection pump there's two types of problems. The first is leaks and somehow people consider re sealing a pump a rebuild. It isn't. Your technical manuals explain this. I have re sealed Roosa Master pumps myself. It isn't all that difficult except for the cleanliness.

The second problem is a pump with worn parts that need replaced and needs to be brought back to like new condition. That's a rebuild. It takes someone with a lot more training and skills to even know what to look for along with the test equipment to make sure they didn't miss anything.

A couple years ago my 851 needed pump attention. Yes there was a drip from the pump that I could have fixed. The problem was the hard starting both hot and cold. That pointed to extremely worn parts and knowing that was beyond my skillset I contacted Dieseltech and sent him my pump. He found pert near everything inside was shot. Fortunately for me he had the parts I needed in a used batch he acquired. He rebuilt the pump and sent it back. I installed it and then spent mabey 10 minutes bleeding it and she cranks and runs like a top. That's the first time I ever saw one of those ford's you could bleed with the starter and not overheat it. Done right and a very reasonable cost works for me.

 

[showcrop]

Of course you have seen bad pumps. But if they all needed heads and rotor there would be no core pumps to rebuild. The rotary pumps are simple robust pumps that mostly need simple repairs.
Why do you not want people to fix any problem with there pump?

The problem lies in the word "mostly".

 

[Frankinfl]

Twenty or so years ago there was a poster on this forum that went by "JDMaris". He had been a Deere mechanic. He encouraged people to work on their own injection pumps. He said most of the pump problems could be fixed on the tailgate of your truck.
In the past this forum has helped and encouraged people to fix their own tractors. I spent some time away from this forum and on my return I find people advocating you can not do that yourself. This change makes me sad. I really enjoyed the old days of help and encouragement.

 

[Dieseltech]

Twenty or so years ago there was a poster on this forum that went by "JDMaris". He had been a Deere mechanic. He encouraged people to work on their own injection pumps. He said most of the pump problems could be fixed on the tailgate of your truck.
In the past this forum has helped and encouraged people to fix their own tractors. I spent some time away from this forum and on my return I find people advocating you can not do that yourself. This change makes me sad. I really enjoyed the old days of help and encouragement.

He moved to Michigan from New York some time back. Reason I don't encourage it is because I've seen too many times Billy Joe Jim Bob Bubba Junior makes the damage much worse after he "attempted" to fix it..

 

[BarnyardEngineering]

You have a competent Injector pump Tech right here on Y T, Dieseltech. Reasonable and honest.

Yeah, not to mention busier than a one-legged man at an a$$-kicking contest...

 

[BarnyardEngineering]

The injector pump is on an Oliver 88 with a super 77 engine. The injector pump is a roosa master 635
I called a local Oliver parts dealer that I do a lot of business with and he said he has a completely rebuilt roosa master 633 for $1000 or $800 if I give him the core. Does this sound reasonable?

Yes!

 

[Destroked 450]

Good internet service has only been available in my area for just over a dozen years, I found this forum a short 9 years ago, not being a follower of green JDMaris is a name I’m not familiar with
I have seen thousands of post encouraging first timers and old timers to work on and make their own repairs. However I’ve also seen to many that were encouraged to do their own inj pump repair post back saying they went from a leaking pump to a non running tractor that they are considering selling for scrap
In the past 20 years parts for some of these old pumps have gone from plentiful to near non existent, for this reason alone I would not encourage a first timer to tear into one and accidentally damage it beyond repair
I do all of my own equipment repairs except injection pumps, for that I have a neighbor a few miles from me that is a medically retired pump tech (car accident), on the last 3 CAV pumps he’s worked on for me 2 had worn cam rings, the fuel calibration was off on all of them, I can’t fix that

 

[Frankinfl]

I am glad that I was part of this forum when JDMaris was also a part as his encouragement has allowed me to fix several injector pumps. I find rotary injection pumps to be fairly simple and straight forward. I would go so far as to say if you can not disassemble and reassemble a rotary injection pump without damaging the pump you should not be taking engines and transmission apart.

 

[Dieseltech]

The injector pump is on an Oliver 88 with a super 77 engine. The injector pump is a roosa master 635
I called a local Oliver parts dealer that I do a lot of business with and he said he has a completely rebuilt roosa master 633 for $1000 or $800 if I give him the core. Does this sound reasonable?

The DGFCL635-7AQ pump you have IS NOT for the Oliver/Waukesha engine you have, it's for a much larger Continental TD427 turbocharged Genset engine. You should look for one of these following pumps.
DBGFC627-1BH or 5BH, FITS THE SUPER 77
DBGFC627-2BH, 3BH, 4BH,or 1ED, fits the 770
DBGFC627-2DH, fits the 1550
DBGFC629-5BH, fits the 880
DBGFC 629-7BH, fits the 1600.
The 6 means 6 cylinder engine, the 27 means .270 inch plunger bore, 29 is .290 bore. The 35 is .350 inch bore. MUCH TOO LARGE for the engine you have.

 

[trackrat]

listen to dieseltch ,i was a shop foreman for a jd dealer went to school on pumps i know that i don't know enough to work on pumps plus i don't have the equipment to set them correctly save yourself money let a pump shop fix it

 

[showcrop]

Twenty or so years ago there was a poster on this forum that went by "JDMaris". He had been a Deere mechanic. He encouraged people to work on their own injection pumps. He said most of the pump problems could be fixed on the tailgate of your truck.
In the past this forum has helped and encouraged people to fix their own tractors. I spent some time away from this forum and on my return I find people advocating you can not do that yourself. This change makes me sad. I really enjoyed the old days of help and encouragement.

J.DeMaris was originally from Northeast VT, then he lived in upstate NY near Tug Hill for most of the time that he was posting here. He is a very good mechanic. I remember his post about repairing them on the tailgate of a truck, and yes this still applies. Perhaps the difference is in the number of posters here who had tried repairing pumps themselves with a lack of success. I would estimate that for everyone who posts about repairing one successfully, there are twenty who post because they tried and were unable to solve the problem. A lot of this is due to the lack of a test stand which you need for adjusting the pump for proper performance one it is back together with some new parts.