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Messages - ajaffa1

Pages: [1] 2 3 ... 113
1
Other Slow Speed Diesels / Re: Bamford in a box
« on: May 22, 2024, 12:14:52 PM »
I have used both copper and Dowty washers in many situations in the past. Of the two I prefer annealed copper because it does not decay like the neoprene O'Ring in a Dowty washer. Many years ago I had to fight a fire in a very large air compressor, a dowty washer had been weeping cooling oil onto the internal electric drive motor. The vertical chimney and cooling matrix was also full of cooling oil. When it caught fire it went up like an atomic bomb. Four engineers managed to control the blaze until the fire fighters arrived. Hundreds of thousands of dollars of damage!

Bob

2
Well done VP. Your new pipes look excellent. Glad you are feeling well enough to get back to what you love doing.

Bob

3
Lister Based Generators / Re: Time for generators
« on: May 13, 2024, 12:01:46 PM »
Hi BruceM, I`m hoping the wiring insulation is going to be OK. There are four things that PVC hates: time, hydrocarbons, heat and rodents.
This was made in 1976 so it`s old enough for time to have taken it`s toll. I had to replace a lot of exposed PVC cabling around the engine.
There was a leaking diesel fuel line that some idiot tried to fix with a pipe clip rather than replace the rubber fuel line, so the entire unit was covered with diesel that had dried into a nasty sticky varnish. This was previously owned by the New South Wales State Emergency Services, a hot day up there would be 50+ centigrade in the shade, plenty of opportunity for PVC to degrade. I did dig a few mouse nests out of the sound proofing but haven`t seen any eaten cabling yet.
I have lived through one mouse plage and seen the damage these little buggers can cause, just as an example; they tried to get into my chest freezer, they could not get in through the top because I had loaded it with concrete building blocks. Didn`t stop them from eating all the wiring and insulation underneath the unit! They also ate the rubber water pipes on my Wife's car, luckily we only took a short journey and didn`t seize the engine.
I`ll let you guys know how it goes.

Bob

4
Everything else / Re: Current limiting device
« on: May 13, 2024, 11:21:25 AM »
Hi Veggie, I am a little curious as to what you are trying to achieve. You have told us that you have a 1000 watt grid tied inverter connected to a 24 volt DC battery bank. How are the batteries being charged, solar panels? Are the batteries being charged from the grid during the day and discharged back into the grid at night?  Are you trying to run off grid at night? Much more info required please.

Bob

5
Lister Based Generators / Re: Time for generators
« on: May 12, 2024, 11:27:56 AM »
G`Day again, my next job is to strip paint and service this control panel, I hate electrical work.

Bob

6
Lister Based Generators / Re: Time for generators
« on: May 12, 2024, 11:21:55 AM »
Thank you Bruce for your kind words. Yes, this unit is a very nice reliable old girl which will probably still be going long after I am gone. Once it is running I will have to write an idiot proof instruction manual explaining how to start/stop it, maintain it and switch the house over to run off it.

Over the last few days I stripped, cleaned and painted the drive coupling. This is a nice unit and has had a good dose of O ring grease applied to the rubbers, that make up the coupling before fitting. I spent a lot of time buggering about to get the coupling as well aligned as humanly possible, a few shims made from damp coursing and it is as good as I can get it. There is a 10 thou gap between the two halves of the drive coupling and this gap only moves by 1 thousands of an inch as I rotate it. Not perfect but as good as I can get it.
A fresh coat of Brunswick green and it should last for years. pics attached.

Bob


7
G`Day VP, I would leave the wrapping on the exhaust pipe. Doing so will increase the temperature in the pipe and reduce the tendency for soot deposits to form and clog the pipe.
I completely understand your horror at discovering that the insulation material is fiberglass, very nasty stuff to deal with using the correct protective equipment. Without it you would have been in a whole new world of discomfort. I hope that the itching and rash has gone away, I found that a very hot shower will remove most of it.
Not surprised that the supplier sold you a very large sheet of gasket material, probably been sat on his shelf for years. I have found smaller quantities for sale on Ebay but they are not cheap.
Keep up the good work.

Bob

8
Lister Based Generators / Re: Time for generators
« on: May 10, 2024, 09:25:50 AM »
Hi Dax021, thanks for the compliment. No great skills involved in this, mostly time, patience and elbow grease. The ability to use a soldering iron helps. Taking lots of photos before and during disassembly helps a lot when it comes to reassembling stuff, especially when you get to my time of life and the memory isn`t what it was. I am a huge fan of electrical heat shrink , very often the original cable identification tags/colours have disappeared, fallen off or become illegible. a dollars worth of different colour heat shrink during disassembly will save you hours of aggravation later.

Bob

9
Lister Based Generators / Re: Time for generators
« on: May 09, 2024, 11:16:39 AM »
G`Day again. Having fitted the brush holders and adjusted them, I decided I was on a roll so I refitted the transformer pack and pulled the wiring back into place. I then took a look at the radio suppression assembly and replaced the four buggered capacitors with new ones. The replacements are smaller than the originals but are rated the same, should be OK. Once these were fitted I powered up my multimeter and  checked the outputs between the neutral slip ring and three others. Just spinning the armature by hand produced 0.1 volt AC from each phase, very happy as it looks like there is enough residual magnetism left for this to re-energise itself without having to flash the field windings.
Pics attached.

Bob

10
Lister Based Generators / Re: Time for generators
« on: May 09, 2024, 10:57:35 AM »
Sorry, forgot to post pics of the brush assemblies

Bob

11
Lister Based Generators / Re: Time for generators
« on: May 09, 2024, 10:52:40 AM »
G`Day Guys and Girls, so having had two wet days I have been able to concentrate on the generator head. The armature is back in place and both bearing houses have been fitted. I popped out the bearing seals at each end and applied a little fresh grease before assembly.
I cleaned the four slip rings with a scourer pad and they look fine, no sign of wear. I spent a lot of time and effort cleaning the brush assemblies, they came out real nice. The brushes look good, one very small chip on one brush, I don`t think it will ever be a problem.
Pics attached.

Bob

12
Lister Based Generators / Re: Time for generators
« on: May 09, 2024, 09:24:04 AM »
Hi Broncodriver. I did post some pics to the LEF while the shed was being built. The shed measures 13m long by 12m wide with two outdoor covered parking spaces and is fully insulated. All up, including concrete slab, 200 tonnes of road base, electrics, plumbing, landscaping and water tanks this cost A$90,000 just shy of $60,000 US.
A couple of pics attached, sorry about the mess, I`m too busy to tidy up!  :laugh:

Bob

13
Lister Based Generators / Re: 1925 Lister 2T and Generator
« on: May 08, 2024, 11:15:31 PM »
Hi Chris, Don`t worry about the skill level of the mechanic, looks like he is getting lots of on the job training.
The gunk in the bottom of the engine is probably the result of non detergent oil which allowed dirt and debris to sediment out. Modern detergent oils keep this stuff in suspension so that it can be removed by an oil filter.
Good luck with the cleaning.

Bob

14
Hi VP, very glad to have you back. Your work just gets better every time, well done.
Not a big fan of Doctors, on two occasions they have prescribed medications that put me in hospital. Please get yourself an up to date copy of Mims. This is the medical practitioners handbook and lists all the medications currently available along with their side effects and how they interact with other medications. Personally, despite having had a heart attack, I take no medications at all. I take a couple of large glasses of red wine every evening, I`ll probably die from liver failure.
Hope you feel better soon, good luck with the vintage engine hunt.

Bob

15
Lister Based Generators / Re: Time for generators
« on: May 07, 2024, 12:27:05 PM »
G`Day Guys and Gals, not much to report, had to spend my day sowing grass seed as we have a wet weather event coming our way.
I did however, find the time yesterday to clean up and test the three phase transformer pack, everything tests OK, cleaned and varnished as per photos. This is a very simple set of transformers that regulates the generator output. All of the load on the generator runs through the 3 large transformer windings, this produces a voltage in the 3 windings on the other side of transformer which are rectified and fed to the field windings. As the load increases so does the voltage being fed to the field windings to compensate for the increased load. This should be a very stable generator so I doubt I will be worrying about an AVR.
Couple of pics attached.

Bob

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