[urq] 20VT 3B Power Steering

[Martin Pajak]

This is the pump I used on my 90q tdi 

http://www.ebay.com/itm/VW-PASSAT-AUDI-A4-BRAKE-VACUUM-PUMP-8E0-927-317-/280
899956635?pt=Motors_Car_Truck_Parts_Accessories&hash=item4166f12f9b&vxp=mtr

it is OEM and Volvo uses it on their XC90 as well

Now Volvo goes a step fruther and uses an external switch (Audi uses the
Engine ECU to control the pump).
So I also installed the Volvo switch.

http://www.matthewsvolvosite.com/forums/viewtopic.php?t=43817&p=213031

The unit takes about 5-10 seconds from empty to build up enough vacuum to
activate the switch.
While driving if I press the brake pedal pedal the pump turns on for 1-2
seconds each time to replenish.

Works great.

Cheers
Martin Pajak

http://www.quattro.ca 

1982 Audi Ur-quattro, SQ project
1983 Audi 80 quattro, Euro 2-Tür
1983 Audi Ur-quattro, Stock Helios Blue
1984 Audi Ur-quattro, 20vt with 6-speed
1993 Audi 90 CS quattro, 2.5 TDI with 6-speed
1993 Audi 80 quattro Avant, 2.5 TDI with 6-speed

 

-----Original Message-----
From: Louis-Alain Richard <laraa at sympatico.ca>
To: 'Patrick Carlier' <p.carlier at pandora.be>; 'Jee Yoo'
<guards4s at gmail.com>; urq <urq at audifans.com>
Sent: Tue, Jun 19, 2012 4:42 pm
Subject: Re: [urq] 20VT 3B Power Steering


Easier than this, Renault diesels from the beginning of the 2000's have a
pump that we all know too well. 

It's exactly the same Bosch unit that powers the cruise control on turbo
cars... 
older or newer. 

Standalone 12V unit, with a check valve and rubber mounting for quietness of
operation.

4B0 907 325:
http://www.ebay.com/itm/1999-VW-PASSAT-CRUISE-CONTROL-VACUUM-PUMP-4B0907325-
/160700434278#ht_2174wt_1163

I guess these are a dime a dozen in a scrapyard.

Louis-Alain

 

-----Message d'origine-----
If you do insist on having a vacuum assisted brake, then get one of those
vacuum pumps from a diesel engine to power it. Some diesels, Ford Transit
fyi, have a vacuum pump on the alternator. Easy and effective.

Pat


 
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Version: 2012.0.2180 / Virus Database: 2437/5080 - Release Date: 06/19/12