How do you check the hydraulic pressure for the convertible top of a 93 Cutlass Supreme and how do you increase the pressure or refill the fluid?
you will have to remove the rear seat as the pump is located
behind the backrest. To remove the back seat, you need an extension
for your socket wrench and remove the two nuts which are about
centered where each person sits. Then lift up the seat to clear
four guide/retaining clips.
Having done that, next lift the cloth well that is glued to the
top edge. Now you can see the pump/motor. it will have clear
hydraullic lines on both sides and a electrical connection. There
is a rubber plug on the side. Turn pump so this faces up. You will
need about 2' of rubber hose or a funnel and a coffee can 1/2 full
of trans fluid. Pull out the plug and insert hose from can to
pump.run top up and down a couple times. This will fill and bleed
the air out. You may need to do this 8-10 times. Don't let the
motor get hot--it's not made to go more than a couple times without
cooling off. Replace plug and inspect lines for leaks.
I have a 95 cutlass supreme, and the pump is visible and
accessible from the trunk. Just lift up the cloth bag that the top
folds into and you will see it. It is a long reach through the
trunk. My plug was on top of the unit, so I did not have to remove
the unit; just unplug and refill.