ndg
Part of things
Posts: 109
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Mar 21, 2017 15:50:49 GMT
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Sure. But you can buy a $hitter for £500 in worse condition. Can't lose on this one 😊 Feeling quite good about my (fully functional) one for 150 quid then. Even if did have to fork out £120 for a service kit and inverter to run it....... |
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Last Edit: Mar 21, 2017 15:51:05 GMT by ndg
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Mar 21, 2017 15:54:51 GMT
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Sure. But you can buy a $hitter for £500 in worse condition. Can't lose on this one 😊 Feeling quite good about my (fully functional) one for 150 quid then. Even if did have to fork out £120 for a service kit and inverter to run it....... You got lucky then. Have been looking for two years and have never seen one go for less than £450 around these parts. |
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Mar 21, 2017 19:20:27 GMT
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My Hydrovane experiences from many years ago (late 80's) were not very positive. It overheated alot and cut-out (usually at very inconvenient times) and was good at filling the air system with oil. The Hydrovane service dept certainly knew how to charge, but I'm not sure the engineer they used to send had any idea what he was doing as the oil-puking habit started after he messed with it. It got fired in the end in favour of a conventional piston compressor which cost less than a visit by Hydrovane. Pity - I always liked the concept. Good luck with yours!
Nick
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1967 Triumph Vitesse convertible (old friend)
1996 Audi A6 2.5 TDI Avant (still durability testing)
1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
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Mar 21, 2017 20:12:32 GMT
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when running right they do chuck a bit of wind out!
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'80 s1 924 turbo..hibernating
'80 golf gli cabriolet...doing impression of a skip
'97 pug 106 commuter...continuing cheapness making me smile!
firm believer in the k.i.s.s and f.i.s.h principles.
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Huzzah. I'm back from 3 weeks holiday and JB is back on the case.
I've always considered getting one of the old compressors with massive tanks, but stuffed compressors, then chucking a nice 3 piston unit on it from a local supplier.
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My Hydrovane experiences from many years ago (late 80's) were not very positive. It overheated alot and cut-out (usually at very inconvenient times) and was good at filling the air system with oil. The Hydrovane service dept certainly knew how to charge, but I'm not sure the engineer they used to send had any idea what he was doing as the oil-puking habit started after he messed with it. It got fired in the end in favour of a conventional piston compressor which cost less than a visit by Hydrovane. Pity - I always liked the concept. Good luck with yours! Nick Yes,they can be a bit like that. You either swear by them or you swear at them 😂 Think they were only ever produced on Fridays and Tuesdays. If you got one built on a Tuesday,it was worth hanging onto,if you got a Friday one, you were in for trouble! |
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Back to it then. Made enquiries,asked around and placed some ads for an oilcooler. No joy. Seemed as if they were rarer than poor quality wobbly children's play pony exhaust. Couple of people would sell me complete airends ,untested,( let that read buggered,but we will pretend we don't know that), units complete for £3-400 . Somehow during this stage I got in contact with a stonemason in Portugal who had a diesel powered variant of the same model I had,and was also looking for spares.Not that I have any use for a stone mason as I feel it would be a bit pretentious to have a bust of myself carved out of granite to put in my garden,and when I pop my clogs I would prefer a last party involving fire and a last blowjob as my ashes get scattered into the wind, as opposed to a tombstone marking where the maggots devoured me.😂.Anyway, he wanted to know if I had had any luck with spares,as he wanted to convert his to three phase electric and dump the diesel motor. Well, seeing I had a brand new 3phase electric motor sitting there,I think you can guess what happened next.....  All the bits he needed,motor,fan,bellhousing,coupling,pipes,fan shroud etc,on a pallet. He arranged a courier to collect and my bank balance went up by £350 😂😂. So, this compressor had made me £300 profit and I still had the airend.Game on. Looks like this compressor could ,if I was careful,land up costing me nothing..... |
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Last Edit: Mar 22, 2017 4:24:56 GMT by Deleted
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 The damaged shaft was an easy fix. Into the lathe and turn the damaged bit where the two lips of the seal had worn into it,down to the same diameter as where the coupling goes on. Then I machined a new sleeve and shrunk it on.  After a quick polish,it's good to go. Polished up on my Google fu at the same time and found out where double lipped ptfe seals are made...  Three days later and £65 I had a new seal  These seals are very easily damaged. You have to be extremely careful when you install them. The fact that you push the shaft against the seals natural path of deflection,coupled with the step in the shaft can destroy the seal in seconds. So,plastic condom/ dildo like insertion tool made,bit of lube and....  Shaft in with no damage to the seal 😊  |
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There's a lot more dildos in this thread than there used to be...
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The eagle eyed amongst you may have noticed something in the last couple of photos. Seeing I couldn't find an original oilcooler, the compressor had cost me -£300 and I no longer had a motor for it,I had decided to modify it a bit. First up was tapping the housing to suit 1/2" pipe fittings.  That allows me to run a conventional oilcooler on the side,as opposed to the donut type oilcooler it originally had. Plan was to derate this unit a bit as well. I don't need air at 10bar, it's a waste of time and energy compressing air to 10bar only to regulate it down to 6 bar for general use and then down to about 3,5 bar for the plasma cutter.I also don't need the volume of air this could produce,so,plan is to drop the working pressure of the rotor chamber down to about 7 bar,(very easy to do,hydrovane themselves do the same thing on certain models), and to run the compressor at a slower speed. The new hydrovanes do something similar by running a variable speed drive/ motor controller, and when demand is low on the system,the motor ramps down to a minimum rpm of around 700.As demand goes up,the vfd ramps up and the rpm ,dependant on load,is adjusted up again until on full chat it runs at 1440rpm. Nothing as fancy on mine.Belt reduction to get it to run at about 1100 rpm via a belt drive with pulleys, and it should all be happy running off a 2kw ,single phase 1440 rpm motor....Time will tell, but no reason why it shouldn't.... |
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ndg
Part of things
Posts: 109
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Mar 22, 2017 10:10:25 GMT
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Feeling quite good about my (fully functional) one for 150 quid then. Even if did have to fork out £120 for a service kit and inverter to run it....... You got lucky then. Have been looking for two years and have never seen one go for less than £450 around these parts. I did yes, bought from a factory auction, with the risk of it being knackered. I reckoned I could sell parts to recoup the majority of the value if I needed to. On your plan to derate, and sorry if I'm teaching anyone to suck eggs, info on these isn't that common, so wanted to share what I'd found. It's tricky to tell from the photos, but it looks like yours is either a 501PUTS or 502PUTS? The 501 should generate 4.2cfm, and the 502 8.2cfm (to make it clear to other readers, this is FAD at 10 Bar, not displacement, which is how most compressors are marketed). There were a few other changes, but as I understood it, the air ends of these two are essentially the same, with the difference in delivery being due to a faster motor on the 502 (2850 vs 1410rpm). Your plan to run a belt drive from a 2kW motor sounds good, 1100rpm should give you ~ 3.3cfm, and only requires ~0.9kW, so you'll have plenty of headroom. 7 Bar is a good pressure to go for, as you say, hydrovane do this too, and it's well clear of the 5Bar setting of the minimum pressure valve (again for other readers, this keeps the pressure inside the housing to at least 5Bar as the internal pressure is used to circulate the cooling/lubrication oil through the oil cooler). As a side note, as I had a VFD to run mine, I added a pressure sensor to build in load dependant running. I got the logic working okay, but found that the two pole motor I was using started to cog against the load as I ran the speed down. I think it would be much better to take a 4 pole motor and run it to 200% speed, so a 501 would have been a better starting point for that - though I don't know if the motor would have been okay with it. The winding currents would be the same but the voltage would be double as would the heat generated. |
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Mar 22, 2017 10:39:50 GMT
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^^
It is a 25PUAS. 20 cfm, 3,8kw, 1760 rpm. 10 bar working pressure. So, with it running 1100rpm and 6.8bar on a 2kw motor, might still be a bit tight. Can always change the pulleys for more reduction, but I think anything lower than 700rpm and you run into problems lubrication and oil separation wise. Worth a punt though !
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Last Edit: Mar 22, 2017 10:40:56 GMT by Deleted
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ndg
Part of things
Posts: 109
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Mar 22, 2017 11:46:37 GMT
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Ah, a bigger machine then, no wonder you don't need it at full chat!
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bstardchild
Club Retro Rides Member
Posts: 14,975
Club RR Member Number: 71
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Mar 22, 2017 13:31:20 GMT
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Anyway, he wanted to know if I had had any luck with spares,as he wanted to convert his to three phase electric and dump the diesel motor. Well, seeing I had a brand new 3phase electric motor sitting there,I think you can guess what happened next..... All the bits he needed,motor,fan,bellhousing,coupling,pipes,fan shroud etc,on a pallet. He arranged a courier to collect and my bank balance went up by £350 😂😂. So, this compressor had made me £300 profit and I still had the airend.Game on. Looks like this compressor could ,if I was careful,land up costing me nothing..... I don't say this about many people but I'm going to say it now If you fell into a bucket of curse word you would still climb out smelling of roses  |
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Mar 22, 2017 13:50:25 GMT
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^^
😂😂😂
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Mar 22, 2017 14:40:33 GMT
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If you fell into a bucket of curse word you would still climb out smelling of roses I guess some people make their own luck. Using the bucket of curse word to plant the roses!!! |
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Mar 22, 2017 21:15:10 GMT
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bah....if I fell in a box of lady bumps I'd come up sucking my thumb!
hope yonder portuguese stonebasher doesn't see this thread as he will realise he is funding our entertainment!!!
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'80 s1 924 turbo..hibernating
'80 golf gli cabriolet...doing impression of a skip
'97 pug 106 commuter...continuing cheapness making me smile!
firm believer in the k.i.s.s and f.i.s.h principles.
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Mar 22, 2017 23:25:45 GMT
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The eagle eyed amongst you may have noticed something in the last couple of photos. Seeing I couldn't find an original oilcooler, the compressor had cost me -£300 and I no longer had a motor for it,I had decided to modify it a bit. Ah I thought for a moment you were going to build a rotary engine for it.  |
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bah....if I fell in a box of lady bumps I'd come up sucking my thumb! hope yonder portuguese stonebasher doesn't see this thread as he will realise he is funding our entertainment!!! Eduardo is a really nice guy. He was so thankful that someone would help him out. I gave him copies of the relevant assembly diagrams so we could work out what he had and what he needed. We spoke on the phone a couple of times. Always makes me laugh when you hear a person speaking English, when it's not their mother tongue,and they have a perfect American accent. I asked if he lived Stateside at some point,and he said he has never left Portugal.He taught himself English,which was perfect,from self learning tapes. Tapes must have been American ! He suggested the price,which I didn't quibble about,and given it was a never used three phase,four kw motor of decent make,he got a good deal. He said hydrovanes were not that common in Portugal,and most people he had contacted wouldn't help with shipping there. All I did was bolt it to a pallet,he arranged everything else.... |
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The eagle eyed amongst you may have noticed something in the last couple of photos. Seeing I couldn't find an original oilcooler, the compressor had cost me -£300 and I no longer had a motor for it,I had decided to modify it a bit. Ah I thought for a moment you were going to build a rotary engine for it. It's got rotary heritage already.Was tempted to give it a full Bridgeport,but figured I didn't need a compressor than went BRAP BRAP BRAP 😂 |
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