Thursday, July 08, 2010 - 07:26 pm, by: Tony Wang(Soartosky)
Hi guys, This is my first post and I need some help on my brake and suspension errors.
My abs pump is going on and off in an interval of about 2 seconds, it started this kinda of strange phenomenon last year and I didnt have time to fix it. Now I need to go through WOF again, and I have no idea how to solve the problem. I have changed the brake pads, bleed the brake system and the problem wont go away.
Please help me out here.
the car has been sitting there for 8 months or so, i just started it today.
Thursday, July 08, 2010 - 08:45 pm, by: Dave Hart(Davyboy)
Sounds like your accumulator has no nitrogen pressure so your pump runs every couple of seconds. You'll need to send it off to Peter Taplin over in Melbourne to be o/hauled, say $400 Aussie. Either that or find one in a wreckers with some pressure still in it.
Monday, July 12, 2010 - 07:46 pm, by: Dave Hart(Davyboy)
Yes, that goldy coloured lump of metal is the accumulator. Inside is a piston and on top of the piston is supposed to be a very high pressure of nitrogen. Underneath the piston is where the brake fluid gets pumped into. To pump the piston up requires the fluid to be at a greater pressure. As the nitrogen pressure leaks away (we're talking about a car which in your case is 19 years old) then the fluid needs to gradually fill the space inside to achieve the pressure required. Because only the nitrogen can compress then the pump needs to work harder the less the nitrogen becomes. You don't need to worry about the nitrogen pressure -yet- just the fluid pressure. What usually gets rid of the fluid pressure is that, without the key in the ignition, you quickly pump the brake pedal about 30 times to transfer the fluid from the accumulator back into the reservoir - you should see a rise in level. If that picture is of your unit then how you accomplish that I've no idea. Anyway the accumulator just screws off in the usual fashion but can be quite tight and I needed a chain grip but you may be lucky with an oil filter removal tool. Then just box it up and send to one of those guys in Aussie that over haul them; I used Peter Taplin who was very good and he'll take care of the nitrogen pressure, if there's any left.
Friday, July 30, 2010 - 07:09 pm, by: Tony Wang(Soartosky)
thanks for the reply I passed wof without the abs warning on my dash using your brake pedal pumping method. As the car is used daily, it would be more sensible to find a replacement here in New Zealand or regasing it.
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