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  1. IndroCruise

    AHC Accumulator Bleed Question

    This makes good sense @2001LC -- as always. An expanded explanation and pictures are offered below and may be of interest to others. Over-pressure in the hydraulic side of the membrane will be matched by the gas pressure equalising as the nitrogen is compressed on the gas side of the membrane...
  2. IndroCruise

    AHC Accumulator Bleed Question

    That is good news!! Yes -- definitely worth checking and recording all physical tape-measured heights at each wheel and all Height Control Sensor readings, along with Front and Rear AHC pressures and Height Control Accumulator pressure. At the same time, it is worth taking pictures of the...
  3. IndroCruise

    AHC Accumulator Bleed Question

    Just to mention that this response by the vehicle means that it is not in one of the 'fail safe functions' (phew!!) because AHC is at least working. It is still important to check that the AHC system is working correctly and that a raise has been completed correctly -- even if no DTC's are...
  4. IndroCruise

    AHC Accumulator Bleed Question

    Amazing short life from the previous replacement 'globes'! Were they new when installed? Makes sense that there is some improvement when one new 'globe' is added. The Front 'globes' and actuators are hydraulicly connected -- the Front Gate Valve in the Control Valve Assembly is 'normally open'...
  5. IndroCruise

    AHC Accumulator Bleed Question

    There is no problem creating "yet another AHC thread" -- just ask away! There is not enough information to offer a definitive diagnosis but here are a few thought-starters which may help …. Vehicle: 2001 LX470 -- so 22 years old 299,000 miles DFW Texas vehicle -- so underbody probably is in...
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