Checking Operating Pressure; Checking/Measuring Governor Pressure; Control Pressure - Porsche 928 Workshop Manual

928 Automatic Transmission/Gears, Valve Body
38
3. Lockplate must be pressed into nearest
locking slot again after finishing adjust.
ment.
4. Recheck after finishing adjustment.
Reference Information for Adjustments:
One turn of adjusting screw changes pressure
by 0.4 bar.
Checking Operating
Pressure
Not adjustable; modulating pressure
automatically affects operating pressure.
Checking Gove,rnor
Pressure
Note:
Always disconnect vacuum line to check
governor pressure.
Governor pressure is part of operating
pressure and is brought to the necessary
value by the centrifugal governor.
Measuring Governor
Pressure
Since governor pressure is derived from
operating pressure, operating pressure must
be checked simultaneously or previously.
Drive car on dynamometer or road and
compare governor pressure with values
specified in table.
If no or deviating governor pressure is
measured, the governor must be
disassembled. cleaned and repaired.
Control Pressure
Control pressure is part of modulating
pressure. It is regulated mechanically
depending on position of accelerator pedal.
If modulating pressure is adjusted correctly,
the control pressure will automatically be
correct.
a
Printed in Germany
-VIII, 1984 Checking Transmission Operation 38- 109