HELP REPLACING POWER STEERING PUMP

[sstomcat]

Originally Posted by 43sqd

The fix for this problem is to replace the P/S reservoir #000 460 01 83, seal/O-ring #000 466 18 80, lock clip #003 994 54 45 and two quarts of M/B P/S fluid.

After replacing the above items and filling with fluid, it is extremely important NOT TO START THE ENGINE until after the front wheels are raised from the ground and the bleeding procedure has followed.

So wherever you perform the repair, that is the location that you must raise the wheels.

Here are the instructions for the replacement and bleeding procedure. Hopefully the 2 yrs. of driving with air in your system did not ruin the pump, but this would be the cheapest way to find out.

While doing the engine oil change I found oil around the long bolt of the compressor. Tracing it back it seems that power steering fluid is leaking and the fluid is all over the pump area. I checked the level of the fluid and the 20C mark was way high almost close to the max line for 80C.

Shame that I did not check after the dealer flush a year back!

Question I have now is could this potentially have damaged the pump and causing the leak? I have ofcourse corrected the level, do I need o do anything else at this point of time? Thanks

[sstomcat]

Originally Posted by sstomcat

While doing the engine oil change I found oil around the long bolt of the compressor. Tracing it back it seems that power steering fluid is leaking and the fluid is all over the pump area. I checked the level of the fluid and the 20C mark was way high almost close to the max line for 80C.

Shame that I did not check after the dealer flush a year back!

Question I have now is could this potentially have damaged the pump and causing the leak? I have ofcourse corrected the level, do I need o do anything else at this point of time? Thanks

Anyone
?

[43sqd]

SS, one of the hoses is leaking not the pump itself. Spray the entire area with Brake Cleaner and then look for the source.

It is either the O-ring (#110) at the pressure line or the hose (#220) or the clamps (#230/270) at the return line. Once you open up the P/S system you will have to go through the bleed procedure as outlined in the pdf, with the front wheels off the ground.

My recommendation is, you should get the hose, O-ring and the two clamps to cover all bases.

[sstomcat]

Originally Posted by 43sqd

SS, one of the hoses is leaking not the pump itself. Spray the entire area with Brake Cleaner and then look for the source.

It is either the O-ring (#110) at the pressure line or the hose (#220) or the clamps (#230/270) at the return line. Once you open up the P/S system you will have to go through the bleed procedure as outlined in the pdf, with the front wheels off the ground.

My recommendation is, you should get the hose, O-ring and the two clamps to cover all bases.

Great Information as always, Thanks. I cleaned the area this week'nd and will be keeping an eye for the leakage. Will post back.

[sstomcat]

Originally Posted by sstomcat

Great Information as always, Thanks. I cleaned the area this week'nd and will be keeping an eye for the leakage. Will post back.

After couple of days and some driving still no new leak,looks like it was the overfill...

[phil.m]

I had leak from p/s reservoir about six months ago and replaced it and o ring. No more leak. I did not bleed the system and now have leak but not from reservoir. Could be hose or return line? Took to local indi this morning who said p/s pump needs replacing. $580

Any advice would be appreciated.

2001 ML320 91000 miles

[phil.m]

In addition, the steering is not hard to turn or noisy.