Author Topic: Flushing 6.9 Suspension  (Read 770 times)

Rolo

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Re: Flushing 6.9 Suspension
« Reply #15 on: 26 April 2021, 05:11 PM »
I got the whole system flushed.  Washed out the oil tank.  It was in the parts cleaner for 1/2 hour and we used a 1" paint brush to scrub the bottom.  An incredible amount of rubber.  Nothing shiny like metal that we could see.  Cleaned the strainer which had a little rubber and replaced the filter which had blackened after only 2 years.

Used daantjie's method for flushing and pumped through 5 quarts until the oil was clear and for good measure used the bleeder valves front and rear.  There was still a lot of black oil after the up-down flushing method described above.

One thing is that the oil was all foamy when it came out of the bleeder.  Foamy and dirty.  Now the leaking pump and, if I can figure out how to get it out, the front leveler are off to Martin.

rumb

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Re: Flushing 6.9 Suspension
« Reply #16 on: 27 April 2021, 06:32 AM »
My theory is the foaming oil is from ruptured spheres.  The nitrogen from them mixes into the oil.
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UTn_boy

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Re: Flushing 6.9 Suspension
« Reply #17 on: 27 April 2021, 01:07 PM »
The bits of rubber you saw are also from the ruptured diaphragms in the accumulators.  Glad you cleaned it out! 
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Rolo

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Re: Flushing 6.9 Suspension
« Reply #18 on: 30 April 2021, 03:20 PM »
Martin says I'm just seeing the oil under pressure.  Milky for a few minutes, then it's just dirty oil.  Spheres are all new, so hopefully no more crud in the tank.