kingswood Posted November 2, 2017 Report Share Posted November 2, 2017 i have a jabsco water pump 2620-252 and it has screws holding the cover on, want to swap them for bolts/set screws does any one know the size and length thanks Link to comment Share on other sites More sharing options...
WotEver Posted November 2, 2017 Report Share Posted November 2, 2017 20 minutes ago, kingswood said: i have a jabsco water pump 2620-252 and it has screws holding the cover on, want to swap them for bolts/set screws does any one know the size and length thanks Can you not remove one, measure it, replace it? Link to comment Share on other sites More sharing options...
adrianh Posted November 2, 2017 Report Share Posted November 2, 2017 If the pump is American then probably unf, if not then metric. You will need to measure the top diameter and pitch accurately, then allow a small amount on the diameter to identify any screw. If you don't have the equipment to do this go to a local fastener supplier or engineering shop with a sample. The small numbered American sizes are easily confused for metric. Not all small metric sizes are easily obtained. If you are using stainless make sure they are well greased. Link to comment Share on other sites More sharing options...
ditchcrawler Posted November 2, 2017 Report Share Posted November 2, 2017 Have you seen these http://www.speedseal.com/Pages/techdetails.html Link to comment Share on other sites More sharing options...
Ex Brummie Posted November 2, 2017 Report Share Posted November 2, 2017 Why do you wish to replace the screws? Bolts can be overtightened causing distortion of the cover. As long as the gasket is sound, screws should suffice. Link to comment Share on other sites More sharing options...
Iain_S Posted November 3, 2017 Report Share Posted November 3, 2017 The screws do tend to get mashed a bit, especially if the pump is awkwardly placed. The Speedseal kit Brian recommended is a really good modification. Since fitting one to Gamebird, I can drain the pump or change the impellor, without taking the oil filter off Link to comment Share on other sites More sharing options...
Momac Posted November 3, 2017 Report Share Posted November 3, 2017 (edited) A fiend had an emergency need due to discovering the threads damaged on one of the screws. I had some A2 stainless Button head screws in my tool box and to our surprise they seemed to fit nicely. To be honest i can't recall if they were M5 or M6 - but certainly metric. https://www.screwfix.com/p/easyfix-button-head-socket-screws-a2-stainless-steel-m6-x-20mm-50-pack/8878t The screws , whether original or otherwise only need to be tightened very gently. Alternatively......... https://www.asap-supplies.com/catalogsearch/result/?q=pump+screws https://www.toolstation.com/shop/p85347?searchstr=m6 x 20mm Edited November 3, 2017 by MartynG Link to comment Share on other sites More sharing options...
Naughty Cal Posted November 3, 2017 Report Share Posted November 3, 2017 11 hours ago, ditchcrawler said: Have you seen these http://www.speedseal.com/Pages/techdetails.html We have these fitted and they are brilliant. We use this version the Speedseal Life: http://www.speedseal.com/SpeedsealLife/SpeedsealLife.html The teflon plates help reduce the wear on the impellor if it should run dry. It sounds like snake oil, but we used to go through two or three impellors a year due to dry running after picking up crap on the water intake. Since fitting this we replace the impellors every two or three years when they wear out. The plate has more then paid for itself over the years. 1 Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 3, 2017 Report Share Posted November 3, 2017 I just have a complete spare pump, it is easier to unbolt it (3 bolts) and disconnect the in/out hoses and replace the whole unit than it is to mess about trying to reach around the engine to try and unscrew half-a-dozen unseen screws, remove the impellor, replace impellor and re-fit the cover plate without dropping anything. The ‘old’ unit can be serviced in comfort and put back into the spares box. I also carry spare starter motor, alternator, hoses, fan belts etc. etc. It is easier to DIY than sitting waiting hours for help to turn up. Link to comment Share on other sites More sharing options...
smileypete Posted November 3, 2017 Report Share Posted November 3, 2017 Wonder if studs and wingnuts will do. Could even wire the wingnuts with eg light galvanised or solid copper wire if paranoid about them loosening. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 3, 2017 Report Share Posted November 3, 2017 6 minutes ago, smileypete said: Wonder if studs and wingnuts will do. Could even wire the wingnuts with eg light galvanised or solid copper wire if paranoid about them loosening. Mousing Link to comment Share on other sites More sharing options...
smileypete Posted November 3, 2017 Report Share Posted November 3, 2017 18 minutes ago, Alan de Enfield said: Mousing ? Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 3, 2017 Report Share Posted November 3, 2017 (edited) 55 minutes ago, Alan de Enfield said: Mousing 37 minutes ago, smileypete said: ? Using a fine (galvanised or Stainless steel) wire to secure shackles, nuts, hooks etc. on boats & aircraft. Commonly found on anchor shackles to stop them 'working open' due to either abrasion or vibration. Edited November 3, 2017 by Alan de Enfield 1 Link to comment Share on other sites More sharing options...
WotEver Posted November 3, 2017 Report Share Posted November 3, 2017 38 minutes ago, Alan de Enfield said: Using a fine (galvanised or Stainless steel) wire to secure shackles, nuts, hooks etc. on boats & aircraft. Commonly found on anchor shackles to stop them 'working open' due to either abrasion or vibration. Interesting. When I’ve done that on aircraft props the engineer simply called it ‘fitting the locking wires’. Link to comment Share on other sites More sharing options...
bizzard Posted November 3, 2017 Report Share Posted November 3, 2017 Only needed on Shackletons though. Link to comment Share on other sites More sharing options...
WotEver Posted November 3, 2017 Report Share Posted November 3, 2017 3 minutes ago, bizzard said: Only needed on Shackletons though. “Have you moused your Shackleton?” Is a phrase I never thought I’d hear... Link to comment Share on other sites More sharing options...
bizzard Posted November 3, 2017 Report Share Posted November 3, 2017 Lots of things used to be locked with locking wire on vehicles years ago, like certain flywheel bolts, propshaft bolts ect, especially on diesel engines. Link to comment Share on other sites More sharing options...
Naughty Cal Posted November 3, 2017 Report Share Posted November 3, 2017 3 hours ago, Alan de Enfield said: I just have a complete spare pump, it is easier to unbolt it (3 bolts) and disconnect the in/out hoses and replace the whole unit than it is to mess about trying to reach around the engine to try and unscrew half-a-dozen unseen screws, remove the impellor, replace impellor and re-fit the cover plate without dropping anything. The ‘old’ unit can be serviced in comfort and put back into the spares box. I also carry spare starter motor, alternator, hoses, fan belts etc. etc. It is easier to DIY than sitting waiting hours for help to turn up. On our engine it is far easier to change the impeller then it is to take the pump off. It has been off to fit a rebuild kit with new bearings, seals and shaft. But in a hurry four thumb screws and an impeller change is a less then 5 minute job. Last carried out in the middle of Loch Ness! Link to comment Share on other sites More sharing options...
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