Gun pulsating/vibrating

schrec

schrec

New member
I have a 5.5, 3500, with a K7 unloader. The gun is vibrating. I know the problem is on the skid. I just dont know where it is.
 
Check to make sure you have no air being sucked in to the pump and you also might want to make sure that you inline filter is not clogged.
 
Vibrating or pulsating? If pulsating you either have too small a tip or something lodged to restrict flow.
 
RMedbery said:
Vibrating or pulsating? If pulsating you either have too small a tip or something lodged to restrict flow.
Click to expand...

...or crap in your valves.

Does it pulse under pressure or in bypass?
 
you probably have debris in your check valves,they r located under the big bolt like covers make sure they are functional too.
 
Valves trouble shooting

Probably bad packings or a bad valve. First, check the valves. Take out each of the valves and hold it in between your thumb, pointer and middle finger like a Hershey Kiss. Try to suck through them one at a time. If you have a good valve you can NOT suck through it but you are able to blow it open. You may clean them by soaking them in toilet bowl cleaner for about twenty or thirty minutes.
 
That would be too easy. I would also check the rubber o-rings while I had the valves out, but that is just me.
 
I agree, it is most likely air getting into the system.

HOWEVER, I do put Vacuum gauges on my pumps to see what is the vacuum is.
A vacuum gauge will tell you if you have air or a clogged filter / line.

Should be about -1 to -3 pounds MAX. If more, there may be some blockage. ( Filter or water line not big enough for flow ). This has happened to us before and creates a harmonic distortion withing the pump.

If positive, then you may have some air mixed with the water flow, which is what I thing it is.
 
Russ Johnson said:
Soak the valve in toilet bowl cleaner to remove debris? How about popping it apart, removing the crud, and putting it back in the pump?
Click to expand...

Russ,

Your way is what I would recommend, and would do myself.

Oh Well
 
PWProducts said:
Probably bad packings or a bad valve. First, check the valves. Take out each of the valves and hold it in between your thumb, pointer and middle finger like a Hershey Kiss. Try to suck through them one at a time. If you have a good valve you can NOT suck through it but you are able to blow it open. You may clean them by soaking them in toilet bowl cleaner for about twenty or thirty minutes.
Click to expand...

OK guys...

I jumped the gun. Yes, remove the valves and separate them from the o-rings. Most of our customers around the country do not have the luxury of running purified water through their pumps. Most of the water around the country seems to be scale-forming. Therefore, leaving deposits on wetted components of pumps. Using a descaler on the plastic and stainless pieces was only a suggestion. (Toilet bowl cleaner is a descaler found commonly around the house or shop and is more mild than a commercial grade compound and less expensive, too!)

For GP's recommendation, please visit the following link:

(http://generalpump.com/PDFs/TECHNICAL DATA/ServiceManual.pdf)

Thanks for your patience guys. After this post, I am not sure if this is an appropriate place to offer help or not.

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I am sorry I havent posted back on here to reply to all the great info I have been given. I forgot I wrote this thread cuz every time I got on it was off the top 10. I have a 3/4 hose inlet that I replaced. I checked the check valves for debri, nothing. This happened right after someone in the company hooked up to the back of a restaurant, and filled up with hot water.
 
While you had those valves out did you happen to pull out the packings as well?
 
nope sure not
 
We had a similar problem recently and we found our packings were worn and had to be replaced. You might want to check them out if possible.
 
PWProducts said:
OK guys...

I jumped the gun. Yes, remove the valves and separate them from the o-rings. Most of our customers around the country do not have the luxury of running purified water through their pumps. Most of the water around the country seems to be scale-forming. Therefore, leaving deposits on wetted components of pumps. Using a descaler on the plastic and stainless pieces was only a suggestion. (Toilet bowl cleaner is a descaler found commonly around the house or shop and is more mild than a commercial grade compound and less expensive, too!)

For GP's recommendation, please visit the following link:

(http://generalpump.com/PDFs/TECHNICAL%20DATA/ServiceManual.pdf)

Thanks for your patience guys. After this post, I am not sure if this is an appropriate place to offer help or not.

.​
Click to expand...

Dont walk away.

I welcome your idea. (and all the other tried and tested suggestions too :))
 
Russ Johnson said:
...or crap in your valves.

Does it pulse under pressure or in bypass?
Click to expand...

Hey Russ,
My unloader just started to pulsate yesterday when in bypass. Everything is fine when under pressure.
Thanks in advance for any assistance.
 
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