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Vintage Diesel and Oil Engines Fairbanks Morse, Lister, Petter, Witte and other pump injected Diesel oil engines.

Vintage Diesel and Oil Engines

Old CAV Injector Tester


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  #21  
Old 07-01-2018, 08:22:16 AM
Oil Power Oil Power is offline
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Default Re: Old CAV Injector Tester

This parts list may assist doggone1. Not sure which screw you refer to but perhaps you could identify it from the illustration. A new O ring on the valve behind the hand knob should cure the leak. If you cannot get the correct O ring from a fuel injection specialist, go to a bearing supplier as they usually can assist with O rings. If you require the illustrations at a higher resolution please send me a PM.
Hugh
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  #22  
Old 07-03-2018, 03:20:14 PM
doggone1 doggone1 is offline
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Default Re: Old CAV Injector Tester

Thanks Oil Power that helps a lot looks like im missing 16 needle valve will have a look tommorrow.
The adjusting screw on mine that i mentioned is behind the guage not showing on this parts list will try and get a pic tommorrow and post it
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  #23  
Old 07-04-2018, 12:40:55 PM
doggone1 doggone1 is offline
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Default Re: Old CAV Injector Tester

These are the pictures of the tester and the adjuster behind the gauge
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  #24  
Old 07-05-2018, 03:43:17 AM
Oil Power Oil Power is offline
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Default Re: Old CAV Injector Tester

Interesting! I have not seen this attachment on a nozzle tester before. I believe there will be a plunger beneath the adjustment screw. Its purpose is to adjust the volume of fuel contained collectively in the pressure gauge, the valve and the pipe leading to the injector. This volume has a bearing on the rate of back leakage when testing a nozzle. It is not something you will need to be worried about if you are only testing the odd injector. I would set the adjuster in a mid of perhaps well in position and leave it at that. If I can find a procedure for setting this adjustment I will post it.
Hugh
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  #25  
Old 07-05-2018, 07:33:28 AM
doggone1 doggone1 is offline
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Default Re: Old CAV Injector Tester

Thanks Hugh will set it midway have turned a brass needle valve to fit havnt had a chance to test it yet with new oring what is that supposed to do does it isolate the gauge thanks Ian
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  #26  
Old 07-06-2018, 09:08:03 AM
ronm ronm is offline
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Default Re: Old CAV Injector Tester

On the Bacharach testers I have used, the valve isolates the gauge while testing spray pattern & chatter. The rapid pulsation will damage the gauge. You bring the pressure up slowly to check the opening pressure & close the gauge off for the other tests.
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  #27  
Old 07-06-2018, 11:40:23 AM
doggone1 doggone1 is offline
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Default Re: Old CAV Injector Tester

Thanks tried it with the needle valve i turned down quickly and as you said this has isolated the gauge still got a leak when i open but my o ring isnt quite big enough so i will find a better one and i think it will be fine thanks for all your help
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  #28  
Old 07-13-2018, 03:13:42 AM
Oil Power Oil Power is offline
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Default Re: Old CAV Injector Tester

More on the nozzle tester volume adjuster. The following pages explain its purpose and the adjustment procedure.
Hugh
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  #29  
Old 07-14-2018, 03:31:16 AM
doggone1 doggone1 is offline
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Default Re: Old CAV Injector Tester

Thanks for that Hugh that explains it all I will set it up as per instructions I had a chance to turn another needle valve more accurately and fitted with a new o'ring it has stopped the leak and is working well now I can see why you need to isolate the gauge now.
Just need to set my injectors now.
Thanks again Ian
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