Rebuilding a Citroen D Height Corrector
Rebuilding your height correctors is one of the key steps to restoring correct suspension
performance. Bad height correctors are to blame for a wide variety of maladies, including sudden
drops, erratic height control response, wandering height, even frequent cycling of the pump due
to fluid pressure loss. In the short time I have owned D’s I think I have seen every one of these.
In fact, they were all on my car!
No rebuild is complete unless you also clean out the crossover labrynth. In order for the spool
valve to find center, it must have equal pressure on both sides, and excess fluid that finds its way
out to the ends must have a way out. The tiny disks and spacers trap sludge and tiny particles,
which interfere with the passage of fluid from one side of the corrector to the other.
These tools are used to service the crossover. The diameter of this 5/16” bolt has been ground
down slightly, then a slot cut in its end to form a tool used to get the brass plug out. It is the
equivalent to the tool MR 1376-50 mentioned in the manual. A nail is selected that closely
matches the diameter of the hole found on the opposite side from the plug. The tip is ground flat
to prevent damaging the thin metal spacers. Once the plug has been unscrewed, the pile of disks
and spacers pushed out using the nail.
One major note of caution, though: this manual was written before the use of LHM and
consequently, where solvents used for cleaning suspension parts are mentioned, you MUST use
the proper solvents depending upon the fluid used in your car. For LHM cars, use LHM, gasoline
or mineral spirits. For LHS cars, use alcohol or hexylene glycol. It is also fine to rebuild an LHM
corrector with LHS compatible rubbers.
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