KSB fuel leak?

[GHarman]

Got the Kit, Bosch part #DGK121 for the VE pump. Now to determine the correct o-ring-seal/s. The description on the box says there is an illustrated parts listing. Not in the box! Will have to search the Bosch website for proper application diagrams. GregH

 

[GHarman]

The Bosch website was a dead end. Will call CMP in AM to see if they can e-mail a copy of an exploded view of the KSB with o-ring sizes. GregH

 

[GHarman]

sdstriper, Thanks for the VE pump schematics. GregH

 

[GHarman]

Comrades, I am havink seekrret document from BOSCH courtesy of special agent at Central Motive Power ( BaHaHa says Boris) Am forwarding it via e-mail to Robin to post for you . Oo. The version I sent doesnt copy on that end. Robin suggested we go to a JPG file format. The picture is the pressure modulation valve portion of the KSB. This is not exploded in the VE-pump schematics. The second page is the parts list. Greg

 

[PToombs]

Woo Hooo! We're gonna get pictures! Oo. I love pictures! :-laf Thanks Greg, this will help a lotta people.

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

Sorry It took so long, GregH

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

Lets try this again, one at a time with proper orientation. GregH Cant get it to download again????

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

Trying again for individual pictures. GregH

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

One more time with the single view. Greg

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

Here is the parts list. Greg

 

[GHarman]

Pressure Modulation Valve, KSB, VE pump

Here is the parts list, again. Greg

 

[GHarman]

KSB plug, leak repair

For you all out there that do this on a regular basis this leak fix is a piece of cake. I am not a diesel mechanic nor do I have automotive maintainence training, I just need my truck to run reliably. That being said; I remember about cleanliness first, on injection pump systems. I flushed off the outside and wiped down the work area with a lint free cloth. Removed the plug. No fuel leaked out. Part number 3 and 4 in the exploded view were the subjects for replacement. Inspected #3 o-ring that was captured on the plug shank. Measured it with a vernier caliper to match it to a new o-ring in the DGK-121 kit. The #4 o-ring stayed in its seat in the pressure control module bore. Stripped a piece of copper electrical wire and used a dental mirror and removed the stuck o-ring. The #3 o-ring was cracked and flattened and very brittle and the #4 o-ring was severely flattened. Located o-rings in the kit that were oversized in OD and undersized in ID by a slight amount. Soaked everything with MMO and assembled the o-rings to the plug. Screwed the plug back into the housing until it got tight. It was still quite a ways from being in position but the #3 o-ring had not seated as yet. When that slipped into its seat the plug got loose again. I tightened it until it seated with a pressue measured in 'THUMB POUNDS":-laf. Anyway, IT DONT LEAK NO MO' I hope this helps others out there with the same problem. BTW the plug appears to have a ball and spring check or relief valve in it. I dont know if there are parts or a replacement available for this. GregH

 

[GHarman]

I want to thank you all for your input and help in getting this headache taken care of. Thank you so much. GregH

 

[Jet Tech]

Still a great post Greg - Thanks for all of the follow-up! #3 and #4 are the parts I need.

 

[GHarman]

Jet Tech!
Glad this thread was a Help to You!
GregH