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Old 14-08-14, 04:41 PM   #1
Dan_pt
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Default Bamford OV

Hi, With the magneto trip problem fixed I made an attempt at starting the Bamford today, upon cranking it became apparent that there is something amiss internally as the compression felt better if the engine was turned backwards!
Here is the engine in question..


The odd compression prompted me to lift off the valve cover..


I have never had an engine with a valve arrangement like this where both valves are operated from one rod.....and there lies my problem, the inlet valve is not being opened at all, the rocker has been welded at some time and does work as the exhaust valve opens and closes perfectly.
Here is a very short video of what is going on, just click on it and it will open up.

The valve operating rod looks like it is adjustable at the top but I have to say that it doesn't appear to even attempt to pull down. Are there two cams working opposite each other?
Can anyone shed some light on this please before I delve into the depths of the crankcase.

Many thanks Dan
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Old 14-08-14, 05:08 PM   #2
Appletop
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Don't know about the Bamford (Not jealous in any way...) but the PH Crossleys have a similar arrangement and these have a big spring to "pull" the pushrod back.
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Old 14-08-14, 05:56 PM   #3
Dan_pt
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Cheers Rob, maybe that is broken/missing on this one.

Dan
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Old 14-08-14, 06:02 PM   #4
stover600
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Just a thought on your comment regarding the compression but are you sure you're cranking it the right way?.
I see you have the option to put the handle on either side which will give you two different directions of rotation.
It sounds daft but worth checking with someone with a similar engine.
I would guess you crank it clockwise from the carb side allowing you to hold the choke at the same time.
Good luck Andy

Last edited by stover600; 14-08-14 at 06:04 PM. Reason: add text
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Old 14-08-14, 06:10 PM   #5
Dan_pt
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Quote:
Originally Posted by stover600 View Post
Just a thought on your comment regarding the compression but are you sure you're cranking it the right way?.
I see you have the option to put the handle on either side which will give you two different directions of rotation.
It sounds daft but worth checking with someone with a similar engine.
I would guess you crank it clockwise from the carb side allowing you to hold the choke at the same time.
Good luck Andy
A good point Andy. I did wonder about the direction of rotation because as you pointed out it could be cranked from either side. That was one reason for lifting the rocker cover so I could watch the valve sequence............unfortunately one of the bu~~ers will not move!!!!!!!!!!!

Dan
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Old 14-08-14, 06:44 PM   #6
air-cooled
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Well its easy enough to check the inside of a fold over Bamford, crack it open and have a look.

Phillip
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Old 15-08-14, 01:37 PM   #7
Dan_pt
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Now running like a clock......a rather noisy clock it's definitely firing very late so I will see if I can adjust the timing a bit.
I'm guessing that Rob was right and the valve gets opened by a spring as it turned out that the valve was stuck. With it freed off it all works perfectly.

Dan
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Old 29-07-17, 04:37 PM   #8
Tractorman19
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Default Bamford ov

Hello , i am new here and was wondering if anyone could help me with my ov engine , i cannot get the ek magneto set up right ... can anyone help with pictures or instructions please.... thank you
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Old 29-07-17, 09:16 PM   #9
lister man
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Has the mag got strong magnetism . is it returning to its keeper?
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Old 12-11-17, 09:37 PM   #10
Tractorman19
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Quote:
Originally Posted by lister man View Post
Has the mag got strong magnetism . is it returning to its keeper?
Sorry for delay ,yes it does return but now have found the problem , there is a half moon key way in the shaft which comes out the side of the engine which all to do with the timing , so now happy bunny as we have sorted it , but would like to find operating instructions if i can
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