92 RR Classic conversion to non ABS?

[David Harris]

The ABS on the 92 is a non pass through system. The pump and accumulator make the system have "power"
I would just remove the parts but since there is no booster present and the master is the ABS module without the use of the pump and accumulator and pressure switch the ABS will not allow the fluid to pass through there is no pass thourgh to the powered side of the front calipers and there is no pass through to the rear calipers with out the ABS working there are no brakes

The 92 is a stand alone rare beast. Its not so simple to just pull the fuse or remove the parts.

OK. Since the calipers are the same for ABS and non-ABS (and I know they are because I just replaced the calipers on my non-ABS 92 RRC and the part numbers are the same), just take the ABS cylinder/pump lines, etc out and replace them with the standard non-ABS booster and cylinder and you should be good to go.

David

 

[David Harris]

Your understanding is correct but what year? what other parts are needed? Do you have to swap the pedal assembly? What perportioning valve do you use. How do you convert from the dual line front calipers to the single outlet master. Those are the questions I need help with.

The pedal assembly is the same and the non-ABS uses the same dual line calipers as the ABS. I have them on my 92 RR without ABS. Again, just put the non-ABS booster and mc in. You have to use the correct non-ABS mc for a 92 though, and that may be where you're facing problems with trying to install non-ABS parts from an earlier vehicle. I can take some photos of my non-ABS 92 system if that would help.

David

 

[zolo]

The pedal assembly is the same and the non-ABS uses the same dual line calipers as the ABS. I have them on my 92 RR without ABS. Again, just put the non-ABS booster and mc in. You have to use the correct non-ABS mc for a 92 though, and that may be where you're facing problems with trying to install non-ABS parts from an earlier vehicle. I can take some photos of my non-ABS 92 system if that would help.

David

That would be great. Do you happen to have part numbers for the non ABS MC and Booster? Is it stamped somewhere by chance?
I can get the non ABS lines.

 

[David Harris]

That would be great. Do you happen to have part numbers for the non ABS MC and Booster? Is it stamped somewhere by chance?
I can get the non ABS lines.

Here are the photos. The master cylinder has four ports. The driver's side ports both go directly to the front DS caliper. The passenger side ports connect to dual lines which run across the firewall. One of the lines goes directly to the front PS caliper and one goes to the proportioning valve (photo 3). The proportioning valve has three ports. One of them accepts the line from the mc, one goes to the other line for the front PS caliper and one goes to the rear axle, where it splits into two lines across the tubes for the DS and PS calipers.

The part number for the MC is NTC4991. Atlantic British lists it for all 1987-92 RRC's. I can't find a part number for the booster, but I assume one from any 1987-92 RRC would work considering the application for the MC. Hope this helps.

David

 

[d110pickup]

The booster on my 87 is an oddball (expensive!) unit; I wouldn't consider it.
Mike

 

[zolo]

Here are the photos. The master cylinder has four ports. The driver's side ports both go directly to the front DS caliper. The passenger side ports connect to dual lines which run across the firewall. One of the lines goes directly to the front PS caliper and one goes to the proportioning valve (photo 3). The proportioning valve has three ports. One of them accepts the line from the mc, one goes to the other line for the front PS caliper and one goes to the rear axle brakes, where it splits into two lines across the tubes for the DS and PS brakes.

The part number for the MC is NTC4991 and is listed for all 1987-92 RRC's. I can't find a part number for the booster, but I assume one from any 1987-92 RRC would work considering the application for the MC. Hope this helps.

David

You are the man, Thanks for the info. While you where busy being the man I removed the pump, accumulator, and the one way valve on the ABS unit itself.
I dissassembled all parts cleaned and reinstalled. I replaced all copper sealing washers as needed. Payed special attention to the pump head as it is very special and uses a centrifical type pump head with 5 little arms that sling out and pump when the motor is on.

Guess what happened?>>>>>
It works now. A rebuilt and cleaned and I have good brakes and NO ABS light.
Wow Im proud of that. What a strange design but the brakes are very strong now. I guess when it works it works.

Still Im buying the parts to convert for when this system takes a dive for good. But for now I still have just $500 in it. A running driving and now braking "Classic" RR.

Thanks for the help.

 

[David Harris]

You are the man, Thanks for the info. While you where busy being the man I removed the pump, accumulator, and the one way valve on the ABS unit itself.
I dissassembled all parts cleaned and reinstalled. I replaced all copper sealing washers as needed. Payed special attention to the pump head as it is very special and uses a centrifical type pump head with 5 little arms that sling out and pump when the motor is on.

Guess what happened?>>>>>
It works now. A rebuilt and cleaned and I have good brakes and NO ABS light.
Wow Im proud of that. What a strange design but the brakes are very strong now. I guess when it works it works.

Still Im buying the parts to convert for when this system takes a dive for good. But for now I still have just $500 in it. A running driving and now braking "Classic" RR.

Thanks for the help.

Very cool . . . classic Rover fix. These vehicles reward TLC from a hands-on owner. Welcome to the Rover family!

David

 

[Maude]

But for now I still have just $500 in it. A running driving and now braking "Classic" RR.

Nice work. Welcome to the "family"... :victory:

 

[Michael Slade]

What? No pats on the back for me? Where is the love! :coffeedrink:

 

[zolo]

What? No pats on the back for me? Where is the love! :coffeedrink:

Sorry Sorry much love for you. Thank you for the advice. It was good advice. Im glad your were able to confirm that it would indeed work if I pulled that crazy pump apart. I read up on it a bit but there is so many wild ideas on how to make the RR abs work that I was glad to hear you say just pull it apart and stop whinning.

That is a very old school design. Apparently it is a similar design to some fuel pumps.
Also to note this system is similar/the same both in maker and design to the
H1 hummer brake design. not that it matters.

 

[Michael Slade]

Sorry Sorry much love for you.

Just glad to be able to help. Most ABS issues are that damn pump. That pump's main issues are old brake fluid. If you can score a RRC with the ABS that doesn't work, for cheap, you know what to do.

XOXOXO

 

[RoverDude]

I believe I have all the parts you will need. e-mail me at roverdudeATsbcglobalDOTnet