"gvanhouten" wrote:

Here we go. Please take a look as something clearly is not right...

Not sure if new nozzles need to be matched with new bodies? There is zero washer or anything between nozzle and body. Seems a little odd but that was how the last set was and I did not see anything in the parts book saying anything else...

Please comment on what you think... I did not yank the pump I listened and left it alone. Waiting for a consensus to say yank it...

Like I mentioned before, they are hand tightened or just snugged, no washers. When the holddown nut is torqued that's what keeps the nozzle and body tight and sealed in the precombustion chamber. That's why the nuts are torqued, if over tightened it will crush and damage the nozzle.

"Rome wrote:

Like I mentioned before, they are hand tightened or just snugged, no washers. When the holddown nut is torqued that's what keeps the nozzle and body tight and sealed in the precombustion chamber. That's why the nuts are torqued, if over tightened it will crush and damage the nozzle.

Thanks Rome,

I did not over tighten you can see the nozzles new ones are leaking and not consistent...

"gvanhouten" wrote:

Here we go. Please take a look as something clearly is not right...

Not sure if new nozzles need to be matched with new bodies? There is zero washer or anything between nozzle and body. Seems a little odd but that was how the last set was and I did not see anything in the parts book saying anything else...

Please comment on what you think... I did not yank the pump I listened and left it alone. Waiting for a consensus to say yank it...

Should work now Neil... Thanks for letting me know

Here is another one without the nozzles on them to show pump flow..

I think those nozzles are junk! Check the body, what the nozzle threads on to, is the outlet hole in the middle or are there two holes going out the side above the threads on the body? Just a note though, it does say in the service manual that if the holddown is not torqued tight or excessive looseness will allow the nozzle to leak and in some instances cause the nozzle to bulge or split.

That's not really a good test. That leakage at the capsule to body joint is affecting the pressure build up needed to crack the nozzle.
When tested on the proper test stand the capsule is retained in a nozzle holding sleeve that is threaded to a substitute holder keeping the capsule enclosed and sealed.
There is no washer involved with sealing the capsule to body joint although one could probably be utilized for test purposes.
That #6 capsule definitely has a problem. It should not leak as it does out the tip.
Your getting plenty of fuel supply.
Both capsules and pumps can be professionally tested. You need to source that service and utilize it.

"Rome wrote:

I think those nozzles are junk! Check the body, what the nozzle threads on to, is the outlet hole in the middle or are there two holes going out the side above the threads on the body? Just a note though, it does say in the service manual that if the holddown is not torqued tight or excessive looseness will allow the nozzle to leak and in some instances cause the nozzle to bulge or split.

The body is straight through they are brand new from cat!

Meaning the nozzles...I agree with old magnet that the test is probably not the greatest as it needs to held in place for this particular test...

I agree Mag, I have seen those nozzle bodies with a hole straight out the end and some with two holes out the side and no hole in the center. From the whole prechamber/nozzle cutaway in the service manual, the body with the holes out the side would not let the fuel go straight to the nozzle, the threads and the mating surface of the nozzle and body would block the fuel from getting to the nozzle.

"gvanhouten" wrote:

The body is straight through they are brand new from cat!

Meaning the nozzles...I agree with old magnet that the test is probably not the greatest as it needs to held in place for this particular test...

10-4, just asking.

"Old wrote:

That's not really a good test. That leakage at the capsule to body joint is affecting the pressure build up needed to crack the nozzle.
When tested on the proper test stand the capsule is retained in a nozzle holding sleeve that is threaded to a substitute holder keeping the capsule enclosed and sealed.
There is no washer involved with sealing the capsule to body joint although one could probably be utilized for test purposes.
That #6 capsule definitely has a problem. It should not leak as it does out the tip.
Your getting plenty of fuel supply.
Both capsules and pumps can be professionally tested. You need to source that service and utilize it.

I agree with you regarding not the greatest test. Would you if you where me just purchase 6 new pumps for the top of the IP? I believe they call them jerk pumps.. I have sourced a shop on Oahu and he does all the pacific coast for Hawthorne Cat.... he wanted the whole pump and injectors to see...

Ask again if they can test just the nozzles and individual pumps (no they are not referred to as jerk pumps)
I'd go the test route before buying anything, that's what the test process is for.