EHCS Replacement Pump - BMW Luxury Touring Community
 
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post #1 of 9 Old Sep 13th, 2010, 9:42 am Thread Starter
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EHCS Replacement Pump

I have not come across on this forum the info on were to get the Marzocchi pump replacement for the electohydraulic center stand. So from the USA representative of Marzocchi Pumps they gave me the name of Motion Industries as a distributer of their pumps and they had locations across the US. I contacted their office closest to me(about 45 miles) and they have ordered one of these pumps for me, it has a 12 week lead time and costs $150 with shipping. The 12 week lead time was also what the Marzocchi Pump Representative told me to expect. So, obviously they do not keep them in stock in the USA.

I ordered: Marzocchi Pump - U 0.25 R 24 FX

Hope this info is useful to others.

Bill Dowdy
2014 RT
2006 LT
2000 HD Ultra Classic
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post #2 of 9 Old Sep 13th, 2010, 12:27 pm
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Re: EHCS Replacement Pump

Bill.. if this works for you, let us know.. we'll then ask the gu-ru's to stick it in the "HOW"...

...............
J.M.J...
Dcn Channing

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post #3 of 9 Old Sep 13th, 2010, 2:53 pm Thread Starter
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Re: EHCS Replacement Pump

sorry just noticed I put the wrong pump number it should read KX not Fx. The full number is

U 0.25 R 24 KX

Bill Dowdy
2014 RT
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post #4 of 9 Old Dec 29th, 2015, 4:35 pm
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Re: EHCS Replacement Pump

I know that this is a really old post. I am actually curious if anyone has used this pump as a replacement. I am trying to get the internal seals for the OEM pump.

Thanks..
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post #5 of 9 Old Dec 29th, 2015, 6:42 pm
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Re: EHCS Replacement Pump

Quote:
Originally Posted by dsherman View Post
I know that this is a really old post. I am actually curious if anyone has used this pump as a replacement. I am trying to get the internal seals for the OEM pump.

Thanks..
I remember John Zeiler kicking the issue around a little while back. Thought that he and others had it sorted out. You might try digging up JZ's posts on this if you need intel

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post #6 of 9 Old Dec 29th, 2015, 8:10 pm
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Re: EHCS Replacement Pump

Well I have rebuilt about 25 of these actuators and only had one issue with the actual pump. That was where the owner had disassembled it and put the plastic inserts back into the rubber seals backwards. All I had to do was reassemble them the correct way and all was well. I usually don't even disassemble them anymore, but do pull the two nuts to remove the pump from the body and I just flush fresh oil through the pump and then re-install - never had a leak. Of course everything must be spotless on reassembly or you will have a leak.
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Last edited by jzeiler; Dec 29th, 2015 at 8:18 pm.
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post #7 of 9 Old Dec 30th, 2015, 12:19 pm
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Re: EHCS Replacement Pump

Quote:
Originally Posted by jzeiler View Post
Well I have rebuilt about 25 of these actuators and only had one issue with the actual pump. That was where the owner had disassembled it and put the plastic inserts back into the rubber seals backwards. All I had to do was reassemble them the correct way and all was well. I usually don't even disassemble them anymore, but do pull the two nuts to remove the pump from the body and I just flush fresh oil through the pump and then re-install - never had a leak. Of course everything must be spotless on reassembly or you will have a leak.
how much to have you go through and rebuild the EHCS unit? Thanks

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post #8 of 9 Old Dec 31st, 2015, 3:08 pm
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Re: EHCS Replacement Pump

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how much to have you go through and rebuild the EHCS unit? Thanks
In a nut shell I drain the unit, pull the motor off, inspect the brushes and then remove the cylinder. Next remove the pump from the body and then split the body. Remove the pressure regulator and relief valve. Now I can thoroughly clean every thing and then reassemble with new o-rings. Flush the pump with fresh oil. Replace the shaft wiper and seal. Polish the shaft (or replace if pitted/scored). Put it all back together and fill with 140 ml of jack oil and load test. More or less...

But you can get by with just pulling the cylinder off and replacing just those two o-rings, shaft and wiper seals ($25 kit from Allied Metric Seals). But I usually get 5 years out of a rebuild my way.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #9 of 9 Old Jan 1st, 2016, 10:04 am
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Re: EHCS Replacement Pump

I emailed a company to see if I could get the internal seals for the pump with no luck. I found that the torque for the pump to be 5.4NM which I converted to about 47 in lbs. bench bleed it and had no leaks. Reinstalled the actuator and while the first attempt to use the center stand nearly worked correctly, it timed out and stopped. The 2nd attempt did in fact work correctly. Hopefully all is well now. Keeping the motorcycle on the side stand sure makes starting way more oily. Didn't run it yesterday so today am going to start her and hopefully the oil that accumulated in the head will have leaked back down and it'll not have so much smoke upon start up.

Douglas..
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