Pressure failure

Dizzle Dazzle

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Sep 24, 2019
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Konrad Bilinski
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Hey guys,

I bought a new APEX 570 truckmount system a little over a year ago. New tanks, new pump new hoses, everything was new. Currently it has about 320 hours on it. About every 10-20 hours of use mid job I lose pressure and I can’t get it back. Sometimes if I shut the machine down and work really slowly I’ll be able to finish the job other times the pressure just doesn’t return. When I get home I try to re-create the issue and sometimes it works fine. Sometimes the pressure isint there like on the job.

I’ve had it in service 10 times since I got it for this issue. literally about 30 hours. The service guy is great and very knowledgeable, he tinkers with all the connections, cleans all the screens we test and it works fine. However because this problem doesn’t manifest itself everytime they keep telling me everything is fine and send me on my way. We’ve done this 10 times already!

Then After about 20 hours of use I’ll lose pressure mid job and the process repeats again. This happens most often on tile cleaning jobs where I’m running the machine at about 1000 psi.

I’m honestly lost for words here, they said they tried everything and can’t find the issue. Has anyone had an issue like this before? What caused it? Is there anyway I can ask for a pump replacement, I know I’ve had it over a year but the system has 320 hours on it and it’s never worked fine from the beginning. My business is really picking up and I’m getting referrals like crazy but whenever I’m cleaning and the pressure goes I feel like someone hit me in the gut. I always have to end the job mid way and promise to come when the machine is fixed. I literally have anxiety over this.

Anyways, I’m all ears. If anyone has suggestions on how to deal with this please let me know.
 

OxiFreshGuy

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Nov 12, 2016
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Boris Johnson
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Interesting, I've got two of the Apex 570's, one with 500 hours and the other with 1,100 hours.

I've never had the issue with losing pressure unless water wasn't transferring from the transfer pump to the pre-heat water box.

If you put your mount on Run position (but not start it) and turn the Auxiliary switch to On, do you hear the transfer pump come on? Does it sound like its working properly?

The fact it happens on tile jobs at 1,000 PSI tells me maybe your transfer pump needs to be replaced, perhaps its not keeping up with the demand. I'd start there first (it's like $75-$100) before replacing the main pump.

One way to test this is to do a bucket test. Put three 5 gallon buckets in a row, crank up to 1000 PSI and run your spinner over the buckets and fill them up. See how long it takes to duplicate the problem.

If I had to bet money though, something screwy is happening with your transfer pump.

Another way to test this is to run water straight from the garden hose through your truck mount bypassing the transfer pump. If the problem still continues then it may be an issue elsewhere.
 

Dizzle Dazzle

Active Member
Sep 24, 2019
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Konrad Bilinski
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Canada
Interesting, I've got two of the Apex 570's, one with 500 hours and the other with 1,100 hours.

I've never had the issue with losing pressure unless water wasn't transferring from the transfer pump to the pre-heat water box.

If you put your mount on Run position (but not start it) and turn the Auxiliary switch to On, do you hear the transfer pump come on? Does it sound like its working properly?

The fact it happens on tile jobs at 1,000 PSI tells me maybe your transfer pump needs to be replaced, perhaps its not keeping up with the demand. I'd start there first (it's like $75-$100) before replacing the main pump.

One way to test this is to do a bucket test. Put three 5 gallon buckets in a row, crank up to 1000 PSI and run your spinner over the buckets and fill them up. See how long it takes to duplicate the problem.

If I had to bet money though, something screwy is happening with your transfer pump.

Another way to test this is to run water straight from the garden hose through your truck mount bypassing the transfer pump. If the problem still continues then it may be an issue elsewhere.
Thanks, I’ll pass this on to the service as guy as we try and work throguh the problem. I’m not very mechanically inclined although I’m forcing myself to learn.
 

Dizzle Dazzle

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Sep 24, 2019
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Konrad Bilinski
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If you put your mount on Run position (but not start it) and turn the Auxiliary switch to On, do you hear the transfer pump come on? Does it sound like its working properly?

I’d say it’s not working properly. The pump will run for a few seconds then turn off, then randomly turn on every few minutes.
 

OxiFreshGuy

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If you have an expansion tank (looks like a big cylinder) it may do that.

If you want give me a call I know these machines pretty well. Can find my number on the website 314-437-5045
 

Dizzle Dazzle

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Sep 24, 2019
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Konrad Bilinski
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Is there any water in your water box when this happens?
No
If you have an expansion tank (looks like a big cylinder) it may do that.

If you want give me a call I know these machines pretty well. Can find my number on the website 314-437-5045
thanks man, we’re out of the house all day today. Can I ring you up tomorrow?
 

Joe cool

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Jan 8, 2015
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20210304_152136.jpg
 

Joe cool

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20201118_084748.jpgRreach into the water box and clean the bonnet Screen filter . You need to clean the soap milk out on the bottom .
The teflon check valve Is letting Soap into the water box .
 

sbsscn

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Sep 17, 2009
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Arm Ben
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It almost sounds like your pump is not getting the amount of flow or pressure .

Does the psi gauge go up and down? or does it stay at zero?

If your system does Not have a water box, make sure at least 30 PSI is getting to your machine. Low pressure can cause cavitation to occur or slurping gulps of air.