Porsche 928 Workshop Manual page 339

20
Fuel Supply
928
Removing and installing the fuel tank gauge unit
When working on the fuel system, observe
relevant safety requirements. Do not remove
the gauge unit while the tank is full.
2. Before fitting a new tank gauge unit,
remove the transport protector.
1.
Remove luggage compartment floor cover.
ing. Remove cover of fuel tank gauge unit.
Undo hose clamp, disconnect fuel return
hose and electrical connector.
2. Undo union nut using Special Tool 9190
Take gauge unit complete with gasket.
Installation
1. Always use a new gasket. Coat threads and
seating area of union nut with Optimoly TA.
Note
TO facilitate assembly, immerse the union
nut into hot water (heated to approx. 66 to 70
deg. C) for approx. 8 minutes.
3. Tighten union nut to a torque of 35 + 5 Nm
(26 f 4 ftlb) using Special Tool 9196.
4. When fitting the fuel return hose,
make sure
the screw of the hose clamp does not con-
tact the union nut or the fuel tank gauge unit.
20- 16
Removing and installing the fuel tank gauge unit
a
Printed In Germany - XXVII, 1991