Power Steering Pump teardown

minicoopers43 · Post by **minicoopers43** » Tue Apr 06, 2010 4:38 pm

Well i decided to take out my power steering pump to see if i can do anything to fix it.
Here is what i found...

: Fluid; P4030282.JPG (101.11 KiB) Viewed 33984 times

This should be a green color!

Inside the pump

: pump side; P4030283.JPG (222.79 KiB) Viewed 33984 times

: motor side; P4030286.JPG (190.2 KiB) Viewed 33984 times

minicoopers43 · Post by **minicoopers43** » Tue Apr 06, 2010 4:42 pm

Motor full of carbon

: carbon; P4030287.JPG (187.13 KiB) Viewed 33983 times

: motor; P4030289.JPG (182.15 KiB) Viewed 33983 times

as you can see there isn't much brush left.

: brush; P4030292.JPG (182.75 KiB) Viewed 33983 times

I took this to a local electrical shop that works on DC motors and at first they said they could do it but they would have to modify some brushes from a golf cart motor and it would be $100 parts and labor but they called today and said its not possible. I suspect they just had better things to do rather than tinker with a motor they don't know if they'll actually get working. I think i'm just going to send it to BBA Remanufacturing and suck it up.

ksminiman · Post by **ksminiman** » Tue Apr 06, 2010 5:59 pm

yummy! what year is your car again? it looks like that thing got really hot!

minicoopers43 · Post by **minicoopers43** » Tue Apr 06, 2010 11:07 pm

It's a 2003, the fan seemed to be working fine, i think the placement of these is just terrible there is too much heat from the exhaust.

Minidave · Post by **Minidave** » Wed Apr 07, 2010 10:16 am

I can fix that motor......

All it needs is a good cleanup, some new bearings and new brushes, and maybe turn the commutator down if it's worn badly.

I just did the same repair to an electrical motor on my wife's Audi, hers was a secondary air injection pump, but the motor doesn't care what it's doing.......go here to read about it.... http://forums.audiworld.com/showthread.php?t=2778668

minicoopers43 · Post by **minicoopers43** » Wed Apr 07, 2010 12:39 pm

I was just going to replace the brushes and clean it out but the problem is i have no idea where to find brushes. If you think you can fix it i'll be more than happy to let you have a go.
Let me know if you'd like to and maybe we can meet up sometime. I will even pay you if you'd like

I just don't want to spend the $200 to have BBA do the same thing i should be able if i had the parts.

Minidave · Post by **Minidave** » Wed Apr 07, 2010 2:38 pm

PM sent

davester · Post by **davester** » Thu Apr 08, 2010 9:04 am

Is this going to be a "GARAGE DAY" ???? Get lots of practice and I will help if needed....

Minidave · Post by **Minidave** » Thu Apr 08, 2010 6:31 pm

The reinstall may be a garage day thing....

You missed the last one, we did about 6 things to x Uh Oh x's MCS about a week ago -things went well tho....

minicoopers43 · Post by **minicoopers43** » Thu Apr 08, 2010 7:08 pm

after the pump is fixed all i need is a new low pressure hose and its ready to go back in. the next thing i'm getting is camber plates and front control arm bushings. maybe i can get them sooner than later then it will definitely be a garage day.

davester · Post by **davester** » Thu Apr 08, 2010 7:12 pm

Sorry, I did not know of the garage day. Please let me know of the next one---

Minidave · Post by **Minidave** » Thu Apr 08, 2010 8:16 pm

It wasn't announced, as it was kinda last minute as to what day we could do it, I'll be sure to post the next one.....

Counterfit_Mini · Post by **Counterfit_Mini** » Fri Apr 09, 2010 6:13 am

Ooooo maybe we can install my roof rack too. LOL

Minidave · Post by **Minidave** » Tue Apr 13, 2010 3:58 pm

Well, a few pics before/after......

The commutator was well worn, but the brushes didn't seem that bad to me, once I freed up the stuck one. I assume the little piece of wire in the one was put there intentionally by minicoopers43 to hold the brush back. Even so, it was stuck in the holder, cleaning it seemed to free it up.....

I replaced the bearings, machined down the commutator, cleaned and re-assembled the pump. Now to see if it works!

Minidave · Post by **Minidave** » Tue Apr 13, 2010 4:04 pm

All back together now....

I'd like to learn more about these devices, under the brush assembly is a little "computer" of sorts, I guess it reads how far the wheel is turned or how quickly and adjusts how the motor and pump respond.....don't know for sure tho.

minicoopers43 · Post by **minicoopers43** » Tue Apr 13, 2010 4:18 pm

WOW! that looks great Dave. Thanks so much for doing all you could to my pump. It should last me quite a while longer now. Were you able to test it with a 12V battery?

Minidave · Post by **Minidave** » Tue Apr 13, 2010 4:36 pm

Not yet, I was hoping to do that tonight when you got there, it'll take both of us, one to connect the wires and one to hold it down, I'm sure it has a lot of torque!

toeknee · Post by **toeknee** » Tue Apr 13, 2010 8:57 pm

Dave--

I do think it is about time for you to open up your own repair shop. The club alone would probably keep you in business.

Minidave · Post by **Minidave** » Wed Apr 14, 2010 9:46 am

Thanks, Toeknee...........I'm working on it, actually. Got to have something to do when I retire, you know......

minicoopers43 · Post by **minicoopers43** » Sat Apr 17, 2010 5:15 pm

SUCCESS! It works, or should i say still works. The real test will be if it keeps working and doesn't randomly go out drivin down the road like it did before. Thanks a lot Dave!

Minidave · Post by **Minidave** » Sat Apr 17, 2010 5:18 pm

Yay!

Another success story from the MINIDave Minigarage.........

Next up, control arm bushings....

boxer · Post by **boxer** » Sat Apr 24, 2010 4:12 pm

I'm game as the first test subject for control arm bushings. Need them installed but could use a second pair of hands. Have garage.

davester · Post by **davester** » Wed Jun 30, 2010 8:19 am

OK, you've had your rebuilt Minidave special power steering pump installed for about ten weeks. Time for for a progress report. Is it still performing as good as new? How about some input on the subject----

minicoopers43 · Post by **minicoopers43** » Wed Jun 30, 2010 3:04 pm

10 weeks WOW! I can't believe its been that long. Well i haven't had a single problem with it, before it would randomly go out for short periods and now its power steering all the time.

Minidave saved me a lot of $

davester · Post by **davester** » Wed Jun 30, 2010 5:01 pm

Glad to hear the fix worked. Congrats---

Kansas City MINI Enthusiasts

Power Steering Pump teardown

Power Steering Pump teardown

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