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951-150-032-EN
Version 08
EN 3. Overview, functional description
3.2 Design
The universal piston detector
234-13163-9 and the bipolar piston detec-
tor 234-11454-1 are position sensors that,
together with the respective pressure-re-
sistant adapter, are screwed into the feeder.
Through the closed adapter, the sensors
detect the feeder piston without coming into
direct contact with it.
Hydraulic pressure spikes therefore do not
act directly on the front sensor surface the
piston detectors.
There are different adapters depending on
the feeder series. These differ in terms of
thread size and clearance. They are specifi-
cally tailored to the respective feeder type
and piston type.
The piston detectors automatically detect
the clearance between the feeder piston and
the piston sensor following several feeder
strokes and adjust themselves automatically.
The universal piston detector automatically
detects the customer’s plug/cable assign-
ment, 2-wire design or 3-wire design (with
cable break protection).
The universal piston detector is not suitable
for usage in vehicles with KFGS or KFGL
lubrication pump due to an undefined pin
assignment. The bipolar piston detector is to
be used in this case.
The bipolar piston detector is available only
in a 2-wire design. The signal voltage can be
applied to either pin 1 or pin 4.
3.2.1 Function
When the piston detector is actuated (piston
stroke), a yellow LED lights up and indicates
correct functioning of the piston detector.
Subsequent replacement of the piston de-
tector during operation is possible in cases
of piston detectors with adapter which have
already been mounted if the corresponding-
ly designed adapter is also mounted. A check
of the adapter version (number of rings) is
to be carried out beforehand in accordance
with Chapter 5.1.
The piston detectors are available with a
corresponding adapter and cable harness
(cable harness only on feeder series SSV,
SSVL, SSVD,SSVDL, SSVE, SSVD-E as a re-
placement for all previous detectors of feed-
er series PSG1, PSG2, PSG3, VP, VPK, VPB,
SSV, SSV, SSVD, SSVDL, SSVE, SSVD-E.
VPB metering device, stainless
steel version
Due to the material used in the
piston (brass), the piston detectors
described here are unable to detect
the movement of the piston when
VPB metering devices in the stain-
less steel version are used. Instead
of the VPB metering device in the
stainless steel version, please use a
corresponding SSV metering device
in the stainless steel version.
