1stGen.org

by **bgilbert** » Mon Dec 03, 2007 10:56 am

Friend of mine's injection pump has started a small leak between the hydraulic head and pump case. I know of the o-ring behind this that needs replaced, but I've never done one nor read how to do one. Seems like I read where someone (with the VE still on the engine) removed the injection lines, delivery valve holders, run/stop solenoid, loosened the screws that hold the hyd head to the case and pulled the head back slightly. Then with a dental pic pulled the o-ring over the square head and replaced it.

We experimented with a hydraulic head I have laying apart on the bench, and it sure looks like you'd stretch out the new o-ring way too much to where it wouldn't seal properly, let alone if you could even pull the head back far enough to get to the o-ring and not have anything fall out or out of place.

I figured at least we'll pull the pump to do the repair, it's easy to R&R a pump. Replace the o-ring on the backside of the pump while it's out and anything else that's easy to get to that is included in the DGK-121 seal kit. But my concern is how to do this repair of the hydraulic head o-ring, anyone? Thanks.

by **KTA** » Mon Dec 03, 2007 11:24 am

It is a pump tear down job out on the bench. I can't see even attempting it opn the motor and not having pieces inside end up where they aren't supposed to be. :roll:

by **wannadiesel** » Mon Dec 03, 2007 4:46 pm

Bill, have you seen the french VW VE teardown page?

http://translate.google.com/translate?u ... uage_tools

by **PToombs** » Mon Dec 03, 2007 5:16 pm

Super detailed pics! Except for the language differences, which you gotta figure out once in a while, it's a good write up!

by **BobS** » Mon Dec 03, 2007 5:42 pm

wannadiesel wrote:Bill, have you seen the french VW VE teardown page?

http://translate.google.com/translate?u ... uage_tools

WOW, that one hurts my head...
Try this one instead:
http://www.vwdieselparts.com/forum/viewtopic.php?t=6694

by **flashgordon** » Mon Dec 03, 2007 6:21 pm

I thing if i was attempting to build one of these pumps. I would save both of these links!!!!!!!!!!!!

Daves still has 100% of the pic's,..... and BobS version, is translated much better.

Flash

by **bgilbert** » Wed Dec 05, 2007 6:11 pm

Thanks guys, I've seen that link before, but never had the time or the core to tear into one and learn how. If I could just find a complete cheap core! All the ones I come across are good and cost at least $250. That's too much IMO to tear into for learning. I do have a basket case pump - completely torn down into all it's pieces. I could try to put it back together with the help of that site

.

by **dpuckett** » Fri Dec 07, 2007 5:22 pm

Doing the o-ring behind the head isnt a bad job. I'd think anyone who has done a gov spring job can do the o-ring. Just be careful with the shims and springs behind the head. I had the best luck holding the pump shaft at a 45* angle. Things didnt tend to come down so fast, yet you didnt have to pull stuff up and out, either.

Definitely take it off the truck. Put a gov spring in it while ya have it all apart and the seal kit there.

Daniel

by **Greenleaf** » Thu Dec 13, 2007 10:49 am

The link is a good one. I had a friend copied each and every page then I took them and installed them all into plastic sleeves. Installed them into a three ring binder. I now the manual version.

If someone is so inclined, you could make a killing on selling them to the gen populus. Please give me 10% for the idea. And NO, I don't need one, mine is fine. (and I insured it against theft) ;-)

Please keep in mind, the pump has some part(s) that are different and or NOT used in our pump. Just an FYI (Look, I racked my brain trying to figure out what part(s) I lost!!! LOL )

The job of O ring R&R. OK, look here. If you want to replace JUST one O ring then go ahead. You'll be pulling that pump again to replace more. LOL Have fun.

Pull the ENTIRE pump down. Inspect EVERYTHING and replace ALL the springs and seals. If your pump operated fine, then freshen it up w/springs and seals. If it don't work, pull it down anyway to locate the damages. A pump shop will charge you for a rebuild. What was rebuilt and how do YOU know what was bad? LOL

by **bgilbert** » Fri Dec 14, 2007 9:03 am

Greenleaf wrote:Please keep in mind, the pump has some part(s) that are different and or NOT used in our pump. Just an FYI (Look, I racked my brain trying to figure out what part(s) I lost!!! LOL )

Isn't that the truth. I'm putting together this pump I bought that was supposed to be complete but in a million pieces etc. Well according to the 103, 114 pump's exploded diagrams and that website I either have a bunch of stuff missing or each or some pump parts are pump/application specific etc.

I'm not very computer literate, I would pay someone to print out all those pages, but you know me, I'm cheap! Maybe I'll give it a try.