HELP -- Pressure Isn't Right

Johnson said:
David, testing pressure at your pump head is not hard. Does the gauge have a q.c. and plug on it? That will make it easier so you can take it on and off.

Snap it on the output of the pump and see what it reads with the machine running and the gun closed.
Then you can set the pressure from there.
Click to expand...

Here is a picture of my pump as I see no easy way to attach anything to it. I have 2 pressure gauges -- one screwed into a quick-connect and plug and one gauge by itself. The one screwed into quick connects is how I have been testing at the wand.

Here is another question: See the 90' elbow coming out of the pump then up into the unloader? It goes into a reducing bushing before going into unloader. I have blown 4 of these reducing bushings since I installed the unloader a year ago. Can I get an elbow (assume 3/8" to 1/2") somewhere so I don't have to keep blowing reducing bushings every 3 months? Yes, even the stainless steel ones as you can see I had to install a brand new one a couple of weeks ago after another one blew and sprayed water all over my Vanguard! Thanks.
 

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HighTide said:
Here is a picture of my pump as I see no easy way to attach anything to it. I have 2 pressure gauges -- one screwed into a quick-connect and plug and one gauge by itself. The one screwed into quick connects is how I have been testing at the wand.

Here is another question: See the 90' elbow coming out of the pump then up into the unloader? It goes into a reducing bushing before going into unloader. I have blown 4 of these reducing bushings since I installed the unloader a year ago. Can I get an elbow (assume 3/8" to 1/2") somewhere so I don't have to keep blowing reducing bushings every 3 months? Yes, even the stainless steel ones as you can see I had to install a brand new one a couple of weeks ago after another one blew and sprayed water all over my Vanguard! Thanks.
Click to expand...

David, as Nigel suggested you can just attach the gauge on the output of the pump before the unloader. (you can plumb the one thats by itself or add a male q.c. and attach the one with a plug and coupler)

When I adjusted my unloader I plumbed it on the output of the unloader. From there I have a q.c. on the output of the gauge for the high pressure hose.
So basically it gets installed after the pump but before the hose.

As far as the bushing blowing I cant answer that. Maybe Russ will have what you need or can explain what to do to keep that from happening. Or anybody for that matter.
 
My guess is metal fatigue from the vibration, add the way in which the unloader is mounted, add pressure and you have a consumable that you will be replacing frequently. Remote mount the unloader on a block, run a jumper hose and there ya have it.
 
Mike, I replaced the sc swivel with a brand new one and rebuilt the original for a backup (found the right size o-ring at Ace Hardware--I think). SC is working good now but still only have 2,800 psi at the gun through 200 feet of new hose. I will order a "gauge port valve cap" soon and screw it into the top middle valve of the pump and mount a pressure gauge into it. My system has never had psi tested at the pump head and will do that before I try anything else. The SC worked good yesterday (new swivel and tips) even with lower psi.
 
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