Benford 1999 5 ton Dumper Cav pump problem

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Jeremy Rowland
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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #11 by Jeremy Rowland » Fri Jan 27, 2017 2:49 pm

Mike I cannot see any wear on that? I assume you are talking about the drive lever? You would see wear on it if it was knackered, does the lever move the diaphragm up an down okay and is the cam lobe okay that works the lever?

Jeremy

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mickdoc6238
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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #12 by mickdoc6238 » Fri Jan 27, 2017 4:29 pm

Jeremy Rowland wrote:Mike I cannot see any wear on that? I assume you are talking about the drive lever? You would see wear on it if it was knackered, does the lever move the diaphragm up an down okay and is the cam lobe okay that works the lever?

Jeremy


Hi Jeremy
I was looking on ebay for a new one and and the new one on the picture has more of a square end at 90°(the end shaft that goes into the engine).
On mine it's has a 45°almost like it's been filed at an angle.Thought this could be wear over the years.
Yes the lever moves up and down fine with the diaphragm and everything seems good.

Looks like it's back to square one :doh:


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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #13 by diggerjones » Fri Jan 27, 2017 7:10 pm

Even if it was worn, you would still be able to pump it with the hand lever

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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #14 by FOWLER MAN » Fri Jan 27, 2017 8:02 pm

The lever on the back of the pump is different for every engine to allow for the position and diameter of the cam that drives it.
The lever on your pump looks fine.


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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #15 by essexpete » Fri Jan 27, 2017 10:47 pm

Was going to comment on the drive lever but I see others already have.

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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #16 by mickdoc6238 » Sat Jan 28, 2017 11:04 am

Thank you guys.....
Looks like I will switch my attention back to the Cav pump again.
Maybe by pass the lift pump with a temp tank before like DiggerJones suggests just to rule out any problems with it to be sure.

Any other ideas thrown into the pot would be very welcome if not already tried
Thanks all
Mick


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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #17 by edenboy » Fri Feb 03, 2017 8:25 pm

mickdoc6238 wrote:
diggerjones wrote:Maybe before you mess with the pump, rig up a temporary tank. Then you're not relying on the lift pump



Just whipped off the Lift pump and hoping that the end should not look like this and I have found my problem

What do you recon is the 45° angle wear and should it be square ?
Image


Those lift pumps are really cheap and would cost around £25 if you have any doubt. Also check the stop solenoid, turn the ignition on and pull a wire off to check for a clicking noise. The ignition also has to be on to bleed it. Bleed from the 8mm bottom bleed screw first. I bleed the top once once it's running. I'm not sure if these engine apply but there are check valves on or near the banjo union with a small ball bearing in, these keep the low pressure side pressure up to feed the pump. Main priorit before removing the pump is to get fuel out of it. Remove the last pipe to the pump and see if it bleeds to there?

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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #18 by FOWLER MAN » Sat Feb 04, 2017 2:32 am

Hi Mike,
Kevin is right, I forgot to mention switching on the ignition to bleed the system. :oops:
Fred

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Re: Benford 1999 5 ton Dumper Cav pump problem

Post #19 by mickdoc6238 » Mon Feb 06, 2017 6:12 pm

edenboy wrote:
mickdoc6238 wrote:
diggerjones wrote:Maybe before you mess with the pump, rig up a temporary tank. Then you're not relying on the lift pump



Just whipped off the Lift pump and hoping that the end should not look like this and I have found my problem

What do you recon is the 45° angle wear and should it be square ?
Image


Those lift pumps are really cheap and would cost around £25 if you have any doubt. Also check the stop solenoid, turn the ignition on and pull a wire off to check for a clicking noise. The ignition also has to be on to bleed it. Bleed from the 8mm bottom bleed screw first. I bleed the top once once it's running. I'm not sure if these engine apply but there are check valves on or near the banjo union with a small ball bearing in, these keep the low pressure side pressure up to feed the pump. Main priorit before removing the pump is to get fuel out of it. Remove the last pipe to the pump and see if it bleeds to there?


This is really useful information,I have just fitted yesterday a new Lift pump and had high hopes but after trying to bleed later last night gave up as nothing was coming out of bleed screws.
I will give it another go later tomorrow with the ignition turned on as up until now the ignition has always been turned of.
Thank you for this and also you Fred for sticking with me on this.
Best regards to you both
Mick


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