Porsche 928 Workshop Manual page 1115

38
Automatic Transm~ssion/Gears. Valve Body
928
E Pressure Test
This pressure test wll lndlcate any defects in the
hydraulic control system.
MEASURING NOMINAL PRESSURES
Automaftc fransm,ss~on IS f,tted wfh three measur,ng
~""nec,~o"s. so fha, the thrrp ,""I, imporfanf
pressures lmodulntl?g pressure. opernt~ng pressure.
governor pressure, can be measi;red Wlfh help Of a
:ester
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i - Mndulating pre5rule
6 Governnr ~ressucc
A pressure tester with up fo 25 bar pressure range
is required for measuring the operating pressure.
The 10 bar pressure wswr is applted for modulatmg
and governor pressure tests.
Pressure gauges are best connected. that they can
be read by driver durtng a test drove (if a dynamo
mewr is not avalablel.
Tester IS set up in footwell in front of front
mssenger's seat. Pressure gauges are connected to
fhelr measurtng points by way of hoses. whtch are
gutded through wndow of r,ght door. Th,s requ,res
dlsconnectlng and pushing shield for rear muffler
astde.
Screw I" adapters for modulattng pressure and
go"ernor pressure co""ect!ons.
A - Short adapter for modulattng pressure
E - Long adapter for governor pressure
0
38.106
Checking Transmission Operation
Printed in Germanv
(Transmission Type A 28.01)