does anyone know who rebuilds these things? does anyone know if anibodysells them rebuilt vs. new?
abs pumps
- Thread starter carlosz
- Start date
I wish I knew of PT's line on rebuilt pumps...
+1 on accumulator, unless you know how to tell that one's good.
+1 on accumulator, unless you know how to tell that one's good.
some people over on rr.net weighed them; found a 'bad' one to be around 1065 grams, and a new one to be about 1095 grams (or 438 new pennies).p m said:
See this thread.
ptschram
Well-known member
p m said:
It took me a long time to find a "Good" source for them. I have only sold a few of them, but they've all survived beyond the warranty period!
They are more expensive than used, less than new, but expensive all the same.
PT
PT, is it just the electric motor part of the pump that is rebuilt, or is it more involved than that?
ptschram
Well-known member
sven said:
From what I've learned since working with the gentleman who doe sthe rebuilding, the motor does not fail until the pump does. When the pump seizes, the motor fails, thus in order to provide a reliable rebuilt pump, both the hydraulics and the electrics must be rebuilt.
The last time I sold one, IIRC, the pump ran about $600 exchange, but I'd have to confirm the price before quoting.
Jim - awesome link.jim-00-4.6 said:
First, I've never known what's inside that ball - now I do.
And I do believe that there is a measurable amount of nitrogen inside.
Funny, it looks like this ball is poached from a Citroen's hydro-pneumatic suspension.
ptschram
Well-known member
p m said:
Which look kinda like Mercedes' hydro suspension. I wonder if the fluids are compatible.
Paul, given your luck with Bilstein shocks -
it just occured to me that all I'd need to make a good accumulator is a small lathe.
Get a broken Bilstein shock, take it apart carefully, cut about 6" from the bottom mount - you may be even able to do it with the gas piston and nitrogen in place!
Cut a fine thread into the wall of the shock, and make a cap with an NPT or AN or metric fitting.
I've rebuilt Bilstein shocks in the past in this way. The only think I'm not certain about is whether the seals they use would live up to the brake fluid.
it just occured to me that all I'd need to make a good accumulator is a small lathe.
Get a broken Bilstein shock, take it apart carefully, cut about 6" from the bottom mount - you may be even able to do it with the gas piston and nitrogen in place!
Cut a fine thread into the wall of the shock, and make a cap with an NPT or AN or metric fitting.
I've rebuilt Bilstein shocks in the past in this way. The only think I'm not certain about is whether the seals they use would live up to the brake fluid.
i think there's a guy on the southern california land rover club who has rebuilt them successfully, I think I actually met him at RR7 or something. I'll see if I can find him. . .
When I replaced my pump and accumulator, I put a hose on the bleed screw on the accumulator. It bubbled like a mo-fo for a few minutes, so I'm sure that was the nitrogen escaping. I drained almost a large bottle of brake fluid out of it. (My original problem was a noisy pump and a drained master cylinder resevour).
It's another $80, but only two more steps after removing the pump.
It's another $80, but only two more steps after removing the pump.
ptschram
Well-known member
az_max said:
Nope, that was just air escaping from the system that was introduced. There is a diaphragm that keeps the brake fluid separate from the nitrogen.
on that note, I wonder if it would be possible to recharge the acumulators with proper amount of nitrogen.?
The problem is - why was it lost in the first place? If that's a hole in the rubber diaphragm, filling it up won't help it.
If the diaphragm is good, you could drill a hole in the back and tap it for a 1/4 NPT port (+check valve +whatever connector you need for 80-bar line).
If the diaphragm is good, you could drill a hole in the back and tap it for a 1/4 NPT port (+check valve +whatever connector you need for 80-bar line).
ptschram
Well-known member
If mine was rusted through, it was the inside like the link's pics.
Other cars have accumulators that can be serviced. how? I don't know. I thought possibly using a needle through the diaphram. Looks like there's a rubber plug there in the pics. Or they just might have service ports on the back sides.
Other cars have accumulators that can be serviced. how? I don't know. I thought possibly using a needle through the diaphram. Looks like there's a rubber plug there in the pics. Or they just might have service ports on the back sides.