General ts2021L pump. The pump is brand new.(out of the box). After getting it hooked up on my machine, I have not been able to get it to work yet. Here is what happens. I turn the engine on(Briggs 16). Pump turns quietly and smooth. I pull the trigger and she vibrates and gets noisy as heck. Seems to have full power but, the vibration and noise are so bad that it scares me to run it long. There is no air leaks(pulled pump off and made sure 3 times already) and am using forced water fed directly to the pump. All bolts are tight and everything seems to be in place. Pump runs smooth until I pull the trigger. I broke a belt the first time I hooked it up(a very strong 1.5 inch wide gear belt). I thought I did not have pulleys lined up right at that time but now, I am sure they are lined up right. I looked over the 2021 trouble shooter guide and it seems to be more than "chattering".
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pump vibration
- Thread starter WashWagon
- Start date
No chem lines going into the pump. It seems like what is happening is that the pump is under tremendous strain when the trigger is pulled. I "think" the vibration is the gear belt being chewed up by the pulley. (maybe that is why the first one popped). It turns fine and very smooth when in bypass mode. Could the unloader cause some kind of hard strain like this on the pump. I am running a K7unloader, but the old pump I replaced was 4.5gpm and the new2021 is 5.5gpm(i think?). Should I get a bigger or different type unloader to compensate for the extra gpm and would or could the old k7 unloader be what is causing the strain on the pump. Thanks for everyones help.
B.E YOUNG Sr
New Member
I am not sure if the unloader is sized correctly for the pump. Never ran a K-7 but seem to remember something about changing restrictors depending on gpm being used.
Did you adjust the unloader setting when you reinstalled it on the new pump? You should always verify the setting is still correct using a gauge. You are now running 24% more water if you are running 5.5 gpm.
Did you adjust the unloader setting when you reinstalled it on the new pump? You should always verify the setting is still correct using a gauge. You are now running 24% more water if you are running 5.5 gpm.
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Unloader is plumbed the same as it always has been. Tried different guns and nozzles. The pump does not want to turn when trigger is pulled without lots of effort. The belt is a gear belt. It looks like a timing belt on foreign cars. It is 27 inches total length and 1.5 inches wide with gears or notches that fit into the pulley. The machine is manufactured by Hydrotek. MARK, even though an undersized unloader would still cycle, could it be making the pump harder to turn? Like I said, smooth running until I pull trigger. At this point, I dont think the pump itself is vibrating, I think vibration is coming from the pulley stripping away at my gear belt when under pressure. I have not checked valves yet. I have not even used the pump since I put it on. I am trying to get all options open before I pull it off the machine again.
Thanks
Thanks
O
OrangeCrest
Guest
I thought that I wasn't sucking any air and assumed it was the unloader. I changed over to a K-7 and if it gets any air at all, it starts surging like crazy.
Chaging out the unloader to the K-7 was great at first, then I started losing pressure and the surging got worse.
I changed over to clear hosing from the supply tank to the pump and "Ding!!" There was the problem... It turned out the connection between the tank and hose at the tank was sucking air through the metal threads.
Added teflon tape and problem solved.
Having the clear hosing before the pump is the way to go. Any air coming though can be seen, bubbles kind of like air going into a fish tank.
Before I did this, I replaced the rings, seals, valves, two-pistons and the unloader. Added the clear hose, found the air leak, $1.98 took care of the problem.
Chaging out the unloader to the K-7 was great at first, then I started losing pressure and the surging got worse.
I changed over to clear hosing from the supply tank to the pump and "Ding!!" There was the problem... It turned out the connection between the tank and hose at the tank was sucking air through the metal threads.
Added teflon tape and problem solved.
Having the clear hosing before the pump is the way to go. Any air coming though can be seen, bubbles kind of like air going into a fish tank.
Before I did this, I replaced the rings, seals, valves, two-pistons and the unloader. Added the clear hose, found the air leak, $1.98 took care of the problem.
B.E YOUNG Sr
New Member
I checked today and your K-7 should be able to be used in either gpm rating.
B.E YOUNG Sr
New Member
Orangecrest,
Glad you got it fixed and it was an easy one.
Are using clamps on your hose?
If you are a couple of drops of locktite will keep the screw from loosening up.
Looks like Mark's initial diagnosis was right on!
Glad you got it fixed and it was an easy one.
Are using clamps on your hose?
If you are a couple of drops of locktite will keep the screw from loosening up.
Looks like Mark's initial diagnosis was right on!
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Scott Stone
New Member
Since you replaced the pump, and it is a different one than original, are sure the drive belt is aligned properly? teh motor would have enough guts to pull the pump when it wasn't under load, and would puke and die once it got under load. Just eyeball it and make sure the belt is straight. Also, since you have a k7, are your nozzle sthe right size on the wand? Did you put teflon on all of the incoming ports? are the all tight? did you double check the lower port opposite the side that the hose goes into the pump and make sure it is tight? Did you fill the pump with oil?
Just some random thoughts.
Scott Stone
Just some random thoughts.
Scott Stone
ShellBean_1
New Member
Same exact thing just happened to me. Threads were stripped & was dripping on the hose connection.DROVE me crazy looking for a plase where air could be getting in.Amazing that a little drip like that can cause such a horrable sound when you pull the trigger.I think the clear hose idea is a very good idea.
I think I got her fixed. Thanks for everyones advice. I adjusted the K7 unloader to almost wide open. I idled the engine down a little also. I retightened the belt and fired her up. I played around with the machine for about half an hour and everything seems to be working fine and I have a lot more pressure with the new pump. I am going to do a little more "tweaking" before I set her back on the truck but it looks as everything is ok. These things are so simple, but so complicated at the same time.