Mercedes-Benz 602, Service Manual

Page: 320 / 324

2-pin connector on valve detach and briefly energize voltage. The
switchover valve must audibly actuate; replace if
necessary.
l-pin connector on pressure switch (S66)
detach and test for continuity with ohmmeter.
The pressure switch (S66) is open in the off
position.
Engine overload protection switch (S66) remove.
Connect pressure switch to cable of nozzle
tester KDJE-P 400.
Connect ohmmeter to pin of pressure switch
and to housing. Build up pressure of
1
0.15 bar at nozzle tester; the pressure switch
must not have any continuity. Replace pressure
switch if necessary.
Special tools
589 00 99 00
Commercial tester
Digital multimeter e.g.Sun, DMM 5
Valve tester e.g. Bosch, KDJE-P 400
(Bosch Order Designation)
Optionally O-6 bar pressure gauge e.g. Bosch No. 1687 231 000
Optionally nozzle tester EFEP e.g.Bosch No. 0684 200 700
09