LW is chattering pretty violently. advice

[soonermajic]

Anyone have any advice? I had my distributor come out, & he sold me a part, charged me $475 for parts & labor (for checking it out) & I replaced the part....STILL chattering!

help? It does this on the HP rinse, for about 5 seconds, then goes away

 

[I.B. Washincars]

Sounds like a cavitation issue to me.

 

[MEP001]

A chattering that goes away is most likely air backing up into the pump or a restriction in the inlet plumbing.

 

[Waxman]

i would check the inlet screen on my hp feed tank. do you have this?

i would then check water feed to hp pump at every point i could disconnect it from feed tank to pump.

i would look for leaks. if air is entering it will chatter. on my touch free it happens if my hp wax runs low and chem line is pulling air (instead of wax ) and injecting it into hp pump.

what part did tech replace? maybe they installed or wired it wrong. did it work properly at all after the part was replaced?

 

[soonermajic]

They replaced the Big plastic check valve, up top in the holding tank. The ball was gummed up & would seeme to be sticking. it worked for ONE DAY!

 

[kentadel]

If that cured it for a day that would be the place to start.

 

[soonermajic]

actually, just for a few washes on the first day. Was back to chattering that same day. Sometimes it chatters really bad, sometimes not as violently...

 

[Waxman]

I agree go back to that check valve. maybe it is gunked up again?

 

[MDrost1]

Btw, you can get the check valves at complete plumber source online. Spears 4529-015 1-1/2" 4529-015 1 $84.00 $84.00
PVC Schedule 80 Socket

 

[soonermajic]

$84? WOW! Dealer charged me $157!!!!!!!!!!!

Seems odd that it could get gunked up again, in ONE DAY. I only wash 10/cpd, so it ain't from overuse. lol

 

[Waxman]

you should get hip to doing repairs yourself. saves a bundle!

 

[bryan church]

I have seen a bad pressure regulator do this. They can suck air in from the hole at the top.

 

[Scrub Free]

Every time for me it has been air entering system a few times with a floating foot valve.

 

[soonermajic]

Scrub Free, that is interesting.... didn't even think about that.

 

[Rick Lancelle]

They replaced the Big plastic check valve, up top in the holding tank. The ball was gummed up & would seeme to be sticking. it worked for ONE DAY!

I would recommend upgrading to a 2" Check Valve, we have found that the 1-1/2" check valve can and will not have enough allowed flow which creates the cavitation or starvation of the pump initially.