Member postings for Robonthemoor

All done and working as it should, once we established it was .3 hp not 3hp, Al204 gave me his small converter he no longer uses and bigo 2800rpm and pumps like a good-en.

thanks all for you help, could not have done it with out you.

Rob

Best debate I've ever read" Al""we will just put a valve on it.

rob

I've fitted a fair few bearing & seals in my time, and I'm almost sure no seal was in that housing, but I can imagine some do have seals, I must say I would expect to see one, but" as the text above says,, pressure has to escape when the tap is off, & not a relief valve in sight .

rob

sorry to state the most obvious but is the rotation correct. Yes a gap in the housing to shaft is normal to allow the outlet on the discharge to be throttled and release the excess flow back to the tank.

Is the converter variable speed

Eric

Rob, as Dave says above, the pump housing must be fully immersed in the fluid being pumped, most run with fluid covering the pump by a good couple of inches.

Most of these pumps (that I've seen) do pour out a fair bit of fluid from the shaft housing when running, this is to prevent cavitation (and the noise that ensues) when the pump outlet is stopped off and also helps to maintain a good mix of coolant fluid.

Edited By Lofty76 on 09/11/2013 22:43:41

No seals in there, if I get chance tomorrow night I will take a photo.

rob

Yes this is the problem, I did not see the . Before the 1 very sorry all for the confusion. Al kept on saying to me 1 hp sounds a bit big for a coolant pump, sometimes we just get our head in the sand. Thanks for all your input & gens.

Rob

final say, should be 0.1 hp

Earth to L1 260v earth to L2 260v earth to L3 265v

L3 to L1 415v L3 to L2 415v

L2 to L1 000v L2 to L3 415v

Wire colours , blue brown black green. In the top of the motor just 1 2 3 terminal

can you work it out from this?

Rob

Yes Jonathan just running that 1 hp motor on its own, the lathe as it's own inverter.

rob

Yes Les your right about the converter, and will check the voltages tonight, at work now. The motor turns as free as a bird so no holding back there, the converter has a sticker on the out plug 415v but like you say each phase could be adrift! I had an electrician look at it last week and different volts was confusing him he his getting some advice from the maker of the converter and was due to come on Saturday to check it, but my son needed him on the farm and that is priority so may get him back this next week. Al204 his coming over today to get his van service by my other son, he said he would bring over his converter to try it on the pump, so when I get back to night I will be loaded with info for you all, pending the grandchildren not carting me off to do something for them, it's all go.

Rob

I can suck fluid up with my mouth, so I would say no blockage. As for the impeller' like I say its in good condition . Will put it in a bucket and well cover the housing and shaft, see if that helps, but with the motor running 1000rpm lower! Then I can't see things improving.

rob

Rob

Hi Eric, I have tried both rotations with the same effect, the converter has 6 setting the higher the number the more power, I use it on my surface grinder running all 3 motors, if I increase the power say number 3 the pump slows! Almost to a stop, So on number 1 it runs but not at full speed! & the boost light stays on! normally it gos out when the motor it's driving get to full speed.

rob

Hi Eric, I have tried both rotations with the same effect, the converter has 6 setting the higher the number the more power, I use it on my surface grinder running all 3 motors, if I increase the power say number 3 the pump slows! Almost to a stop, So on number 1 it runs but not at full speed! & the boost light stays on! normally it gos out when the motor it's driving get to full speed.

rob

I have a coolant pump on my lathe but it can't push the coolant up to the outlet! The pump states RPM 2800 but 2000 is the max I get! It's 3 phase and I'm running it through a converter, how do I test it's getting the correct volts, 3 wires on the back of the pump 1 2 3 terminals, and an earth,. Also when the pump is running fluid is coming out the drive shaft see photo, should it do this? I have got it apart but there are no seals around the shaft just a small gap say half a mm, I will put the photos on in a moment as they are on my iPhone .

rob

according to the Dickson type chart that Jason sent me, it works out as a T2T , why do you think it's an T2 NJH?

Rob