New second hand hydralic pump - not so great

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jwthwaites96
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New second hand hydralic pump - not so great

Post by jwthwaites96 » Tue Sep 23, 2008 8:20 pm

Hi Guy's, I am hoping you guy's might be able to advise me, a fellow BXer and myself have just installed a new second hand HP pump on my 1.9 diesel. Started it up and it works but it is noisey, I am guessing it should be quet but I kind of hoping its not ment to be, something along the lines of diesels being noisey so the HP pump are noisey.
Any help is always appreciated.
J

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ken newbold
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Post by ken newbold » Tue Sep 23, 2008 9:25 pm

Just pot luck I think, it could mean there's wear in the pump of course, but I've known noisy pumps last for years.
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jonathan_dyane
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Post by jonathan_dyane » Tue Sep 23, 2008 10:29 pm

What sort of noise is it?

Are you sure the belt isn't slipping?

They have to be 'kin tight ;-)
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Aerodynamica
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Post by Aerodynamica » Tue Sep 23, 2008 11:59 pm

If you just installed it there can be air in it. Did you prime the pump with LHM before connecting it all up? also once installed, you do the old trick of running it with the bleed bolt of the pressure regulator open then tighten it until the reg cuts out and then open it a gain- repaet this for a minute or so to purge all the air out the regulator and pump.

I had a loud new pump on the CX a few months ago due to not priming properly - primed, restarted and suddenly all was quiet...
Graeme M

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jwthwaites96
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Post by jwthwaites96 » Wed Sep 24, 2008 8:35 am

Hi Guy's, cheers for all the usggestions.
well as for the noise, i'm not sure how best to discribe it, possibly a ticking, it sounds like the bearing is just banging around, I think its rythmic.
The bleed screw thing, do you bleed it till lhm comes out of the bleed?
The belt was slipping but that is all tight now, so thats not the problem.
J

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Aerodynamica
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Post by Aerodynamica » Wed Sep 24, 2008 2:23 pm

The bleed screw thing, do you bleed it till lhm comes out of the bleed?
! no don't remove it or anything!

Sorry I should have been clearer - With a 12mm spanner, all you do is loosen the bolt on the pressure regulator body by no more than 1/2 turn. If the engine is switched off and you then do this you'd hear a sudden localised whoosh sound as the accumulator dumps its contents. With the engine running, loosen this by half turn and wait a few seconds then retighten and wait until you hear the regulator click, repeat a few times - no fluid should come out anywhere - you're bleeding the LHM back to the tank. Some say this procedure should be done with the suspension at high setting but I can't see why it makes a difference. This job is dealing only with the HP pump, regulator/accumulator and the LHM tank.

It was a regular rhythmic ticking my pump was giving too - it suddenly vanished after bleeding.

Having said that it -MIGHT- be caused by a bad pump but you can eliminate it by bleeding the regulator.
Graeme M

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Mk1 Xantia 1.9TD SX

'c'est hydropneumatique'

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Post by DLM » Wed Sep 24, 2008 3:43 pm

If you've got air in the pump - not unusual after a refit or reconnection , then it'll probably be rattling like a bag of nails. Exactly how big a bag of nails, and how many nails depends on the amount of air and where it is.

Cure as per Aerodynamica's post.
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jwthwaites96
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Post by jwthwaites96 » Sun Oct 05, 2008 12:00 pm

hi Guys,
well we have tried doing the bleeding you mentioned but it is still clunking, now at this point i would say its knackered but the thing that makes me think that there is still hope is that the power streering works great but when driving and doing a right hand corner it gets really heavy, would this be due to air being in the system?

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Aerodynamica
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Post by Aerodynamica » Mon Oct 06, 2008 12:57 am

Does it get heavy turning right when you're stopped too?
Graeme M

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Mk1 Xantia 1.9TD SX

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jwthwaites96
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Post by jwthwaites96 » Mon Oct 06, 2008 8:50 am

Hi Sorry i dont think i discribed that too well, by right hand corner i ment 90o angle so going to the extremes of the turn, in both directions. Hope thats clearer.
J