SKF LINCOLN Magnetic sensor M G Series User manual

Version 01
951-150-037-EN
Service manual
Piston detector
with non-adjustable sensing distance
EN
L+
1
2/4 L-
L+
2/4
1
L-
3
for progressive metering devices of the VPK, VPB and VPB series with
shortened stroke, with adapters, optionally with cable break protection
Piston detector

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951-150-036-EN
Version 01
EU Declaration of Conformity pursuant to Directive 2014/30/EU, Annex IV
The manufacturer, SKF Lubrication Systems Germany GmbH, Walldorf Plant, Heinrich-Hertz-Str. 2-8, DE - 69190 Walldorf, hereby
declares conformity of the electrical device
Designation: Piston detector
Model Magnetic sensor M...........G
Item number: 2340-00000026
Year of manufacture: See type plate
to all relevant harmonization legislation of the European Union at the time of placing on the market.
Furthermore, the following Directives and (harmonized) standards were applied in the applicable areas:
2011/65/EU RoHS II
Walldorf, March 15, 2019
Jürgen Kreutzkämper
Manager R&D Germany
SKF Lubrication Business Unit
Stefan Schürmann
Manager R&D Hockenheim/Walldorf
SKF Lubrication Business Unit
Standard Edition
DIN EN 60947-5-1 2018
DIN EN 50581 2013
EU Declaration of Conformity

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EN
Masthead
951-150-036-EN
Version 01
Copyright
© Copyright SKF
All rights reserved.
Warranty
The instructions do not contain any
information on the warranty. This can
be found in our General Terms and
Conditions.
Disclaimer of liability
The manufacturer shall not be held liable for
damage resulting from:
○Improper usage,
assembly, operation, configuration,
maintenance, repair, or accidents
○Improper reaction to malfunctions
○Unauthorized modifications to the
product
○Intentional or gross negligence
○Use of non-original SKF spare parts
The maximum liability for loss or damage
resulting from the use of our products is
limited to the purchase price. Liability for
indirect damage of any kind is excluded.
Masthead
Manufacturer
SKF Lubrication Systems Germany GmbH
Address of manufacturer plants
Headquarters
Walldorf Plant
Heinrich-Hertz-Str. 2-8
69190 Walldorf
Germany
Tel: [phone]
Fax: [phone]
Berlin Plant
Motzener Straße 35/37
12277 Berlin
Germany
Tel. [phone]
Fax [phone]
Hockenheim Plant
2. Industriestraße 4
68766 Hockenheim
Germany
Tel. [phone]
Fax [phone]
E-mail: Lubrication-german[email protected]om
www.skf.com/lubrication
This service manual must be en-
closed with the
product documentation
(e.g., metering device
documentation).

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Version 01
EN Table of contents
Explanation of symbols and signs
General warning Symbol Meaning
Wear personal protective gear
(face mask) Chronological instructions
Wear personal protective gear
(gloves) Bullet list items
Wear personal protective gear
(protective clothing)
Indicates the requirements that must be
met for the actions described
in the following
Pressure injection General notes
Hot surfaces
Warning level Consequence Probability
DANGER Death, serious
injury Immediate
WARNING Death, serious
injury Possible
CAUTION Minor
injury Possible
IMPORTANT NOTE Property damage Possible
Table of contents
EU Declaration 2
Masthead 3
1. Safety instructions 5
2. Scope of delivery/storage 5
2.1 Storage 5
3. Overview, functional description 6
3.1 Progressive metering device overview with .
piston detector 2340-00000026 6
3.2 Adapter 44-0159-25.. 7
3.3 Shielding sleeve 44-0811-2130 7
3.4 Shielding sleeve 44-0811-2129 7
3.5 System design of metering device
adapter and piston detector 8
3.5.1 Function 8
3.6 Field of application of the non-
adjustable piston detector 9
4. Technical data 10
4.1 Piston detector 2340-00000026 10
4.2 Connection options 2340-00000026,
12-24V DC, 3-wire PNP 12
4.3 Connection options 2340-00000026,
12-24V DC, 2-wire PNP/NPN 12
5. Assembly 13
5.2 Assembly of the new piston detector 14
5.1 Disassembly of the old piston detector 14
5.3 Conducting initial functional test 15
6. Malfunctions, causes, and remedies 16
7. Spare parts 19

1
2
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EN
1. Safety instructions /2. Delivery and storage
1. Safety instructions
To convert the piston detector, consult the
documentation for the metering device
(lifecycle manual, assembly instructions) in
which the previous piston detector is used.
The safety instructions in that documenta-
tion must be observed in full.
Further:
○The operator must ensure that these
conversion instructions and the corre-
sponding metering device documentation
have been read by the person who con-
verts the piston detector or supervises or
instructs said person.
○Depressurize the affected metering de-
vice before disassembling the defective
piston detector.
○The operator must also ensure that the
staff fully understands the content of the
instructions.
2. Scope of delivery/storage
The conversion kit for the piston detectors
includes a metering-device-specific adapter.
The piston detectors may be used only with
this adapter.
A stopper and a cable adapter are also en-
closed for the metering device version.
The scope of delivery also includes these
conversion instructions.
2.1 Storage
Storage conditions- See metering device
documentation and:
○Store in the original product packaging.
○Store protected from nearby sources of
heat or cold.
○The permissible storage temperature
range corresponds to the operating tem-
perature range (see "Technical data").
○Putting the products into operation or
operating them without having read the
instructions is prohibited.

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Version 01
EN 3. Overview, functional description
3.1 Progressive metering device overview with piston detector 2340-00000026
3. Overview, functional description
Mounting dimensions of the piston detectors
with sensing distance permanently set, Fig. 1
(....) = mounting dimension of previous piston detector
VPB (VH)* = VPB metering device with shortened stroke (special version)
SW 12
53,5 (53,5)
SW 12
53,6 (53,3)
SW 12
52,9 (53,3)
Piston detector 2340-00000026 VPK VPB VPB with
shortened stroke (VH)
Adapter for piston detector 44-0159-2515 44-0159-2519 44-0159-2518
Shielding sleeve for piston detector 44-0811-2130 44-0811-2129 44-0811-2129
Kit Order no. 24-0159-6029 24-0159-6034 24-0159-6033
VPB VPK VPB
(VH)*
Dimensions of piston detector, Fig. 2
44-0159-251844-0159-251944-0159-2515
8,5
15
M10x0,8
52
SW10
M12x1
8
8,7
3
LED
VPK
1 Ring on the hexagon
+ 2 rings on the cylinder
3 rings on the cylinder
VPB
2 rings on the hexagon
VPB (VH)
2 Ringe am Zylinder
Piston detector + Adapter

3
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EN
3. Overview, functional description
3.2 Adapter 44-0159-251.
Adapter 44-0159-251X, Fig. 3
3.3 Shielding sleeve 44-0811-2130
Shielding sleeve for VPB mete-
ring device and VPB metering device
with shortened stroke, Fig. 5
3.4 Shielding sleeve 44-0811-2129
Shielding sleeve for VPK
metering device, Fig. 4
Dim. A
Dim. B
Dim. C
Type DIM. (Dimension)
A B C
VPK 21.5 13.5 6
VPB 21.8 12.5 6.5
VPB (VH) 21.1 12.5 6.5

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EN 3. Overview, functional description
In cases of other piston detectors, with
and without adapter, the metering device
must first be depressurized. If an adapter is
already mounted, then it must be replaced
with the new adapter (see Figure 1).
Problems cannot occur in the stopper pres-
sure range of the sensor surface/meter-
ing device if using piston detectors with
adapters.
3.5 System design of metering device
adapter and piston detector
The piston detector 2340-00000026 is a
position sensor that, together with a pres-
sure-resistant adapter, is screwed into the
respective metering device.
Through the closed adapter, the sensor
detects the metering device piston without
coming into direct contact with it.
Hydraulic pressure spikes therefore do not
act directly on the front sensor surface of
the piston detector.
There are different adapters depending on
the metering device series. These differ in
terms of thread size and clearance. Another
feature is the wall thickness resulting from
the fixed nominal distance between the
metering device piston and the active sensor
surface.
If a piston detector of series
2340-00000026 is already installed, the
piston detector can be replaced subsequent-
ly during operation. However, the adapter
must not be removed while removing the
existing piston detector!
3.5.1 Function
Piston detector 2340-00000026 is de-
signed as a circuit closer (normally open
contact).
When the piston detector is actuated (piston
stroke), it closes and sends its output signal
(+) to the outlet (2/4). The signal lasts as
long as the piston detector is actuated by the
metering device piston.
At the same time as actuation, a yellow LED
lights up and indicates correct functioning of
the piston detector.
The piston detector automatically detects
the customer’s plug/cable assignment,
2-wire design or 3-wire design (with cable
break protection). The possibility of a wiring
error is thus excluded.
The piston detector, with the corresponding
adapter, is intended as a replacement for all
previous detectors.

3
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Version 01
EN
3. Overview, functional description
3.6 Field of application of the non-adjustable piston detector
Piston detector 2340-00000026 is de-
signed for immunity up to 0.2 mT. Sources
of interference beyond this level can be in-
creased to an immunity up to 0.7 mT using
an additional installed shielding sleeve
(see Fig. 1).
Due to the massive shielding of magnetic
sources of interference, this piston detector
is available only with a non-adjustable sens-
ing distance.
To prevent magnetic transmission from
the customer's magnetic component to the
metering device, SKF recommends install-
ing galvanic isolation, such as a plastic or
ceramic plate. Ensure that the fixing screws
are not magnetically conductive (stainless
steel screws without iron content).
The piston detector 2340-00000026 is
intended for use wherever customer's mag-
netic interference fields negatively affect a
conventional piston detector.
External magnetic fields can result in ex-
treme increase or reduction of the sensing
distance of a conventional piston detector,
causing the piston detector to no longer
provide a constant switching signal or no
longer reach its switching point.
Magnetic fields can be created by, among
other things, hardening processes, inad-
equately shielded servo motors, frequency
converters, magnetic filters, etc. on parts
mounted by the customer.
Measurements by SKF have shown that in-
terference fields with a strength of 0.1 to
3 mT can form.
Piston detector with shielding sleeve, Fig. 6

EN 4. Technical data
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Version 01
4. Technical data
4.1 Piston detector 2340-00000026
General data Designation
Field of application Lubricant metering devices
Ambient temperature [°C] -40 ....+85
Principle of operation Piston detector/position sensor with fixed sensing distance (not tracked)
Field of application Steel position sensor, detects only ferrous metals
Material Sensor surface: 1.4404; Housing: 1.4016; plug: PEI
Mounting type Mountable flush in associated adapter
Tightening torque [Nm] 7 ±0.5
Circuit state display LED Yellow/lights up on damping
Electrical connection M12x1 plug-in connection, gold-plated contact
Sensing range Approval/tests
Sensing distance [mm] 2.2 condition on delivery Certification CE
Hysteresis [% of Sr] ≤ 10% EMC
Accuracy/deviations EN 61000-4-2 [KV] CD:4 AD:8
Switching point [% of Sr] ±10% EN 61000-4-3 [V/m] 10 (80..2000 MHz)
Reproducibility [% of Sr] ±10% EN 61000-4-4 [KV] 2
Permiss. operating
pressure
with associated adapter
[bar]
Identical to permissible operat-
ing pressure of the metering
device in which the sensor with
adapter is installed (see meter-
ing device documentation)
EN 61000-4-5 [KV] 0.5 (line to line, Ri: 2 Ohm)
EN 61000-4-6 [V] 10 (0.15 .. 80 MHz)
EN 55011 Class B
DIN ISO 11452-2 [V/m] 100
Pulse in accordance with
ISO 7637-2 1 2a 2b 3a 3b 4 5
Immunity test level IV IV IV IV IV IV IV
Failure criterion C B C A A C C
Impact strength 1 million

EN
4. Technical data
4
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Version 01
Electrical data
Design 3-wire DC PNP; 2-wire DC PNP/NPN
Operating voltage [V] 10-36 DC, supply class 2 per cULus
Rated insulation voltage [V] 60
Power consumption [mA] < 5 (only in 3-wire operation)
Protection class III
Polarity reversal protection Yes
Readiness delay time [ms] <300
Output function NO-contact
Voltage drop [V] 3.5
Minimum load current [mA] 5
Residual current [mA] < 0.8
Current-carrying capacity [mA] 100
Short-circuit-proof Yes
Overload-proof Yes
Switching frequency [Hz] 10, with damping surface Ø 4mm to 7 Hz
Protection class [IP] IP65 / IP68 / IP69K; with cable box screwed
on properly
Salt mist (EN 60068-2-52 Kb) Immunity test level 5 (4 test cycles)
Immunity to
magnetic interference fields mT < 0.2
L+
1
2/4 L-
4
1
3
2
Connector pin assignment without cable break
protection 2-wire DC PNP/NPN
L+
2/4
1
L-
3
4
1
3
2
Connector pin assignment with cable break
protection 3-wire DC PNP

EN 4. Technical data
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Version 01
4.2 Connection options 2340-00000026, 12-24V DC, 3-wire PNP
Adernfarben / Core colors br = brown = braun / ws = white = weiß / sw = schwarz = black / bl = blau = blue
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
Load
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
Load
4.3 Connection options 2340-00000026, 12-24V DC, 2-wire PNP/NPN
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
load
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
load
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
load
1
2
3
4
12
3 4
+ 12-24 V DC
br
ws
sw
bl 0 V DC (ground)
load
NPN
PNP
NPN
PNP

EN
5. Assembly
5
4
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Version 01
4 3 2 1
VPK/VPB (VPB VH)
Assembly drawing, Fig. 7
5. Assembly
5.1 Disassembly of the old piston detector
1
2
3
4
5
6
7
8
9
10
(ensure full coverage)
5.2 Assembly of the new piston detector
2

EN 5. Assembly
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951-150-037-EN
Version 01
• Disconnect the electrical connection
cable (2) from the old/defective piston
detector.
• Loosen and unscrew the defective piston
detector (3) from the metering device (4).
• Remove the old packing ring (5) from the
metering device (4).
5.2 Assembly of the new piston detector
• Apply grease to the new packing ring (6)
and place it on the new adapter (7).
• Apply the adapter (7) to the metering
device (4) and tighten with the following
torque:
Tightening torque Adapter
SW 12 = 15+1 Nm
Apply new piston detector (8) to the adapter
(7) and tighten gently.
Avoid uncontrolled tightening of
the piston detector.:
This could cause damage.
Maintain tightening torque of
70.5 Nm.
• Tighten the piston detector (8) with a
torque of 70.5 Nm.
See Figures 1 and 7
• Depressurize the lubrication system and
metering device
• If possible, place a drip pan for the dis-
charging lubricant below the correspond-
ing metering device.
• Place individual parts of the new piston
detector replacement kit (1) on a clean
storage surface.
CAUTION
Pressure hazard
Before beginning conversion work,
depressurize the system in which
the metering device with the piston
detector to be replaced is installed
and depressurize the metering de-
vice itself.
See Figures 1 and 7
5.1 Disassembly of the old piston detector

EN
5. Assembly
5
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Version 01
Clean the work area/metering device of lu-
bricant contamination.
• Remove the drip pan.
• Activate the centralized lubrication
system.
• Execute several metering device strokes.
The yellow LED on the piston detector
lights up to indicate an active metering
device stroke. On the subsequent metering
device strokes, the signal from the piston
detector must be received by the customer’s
monitoring equipment.
• Check the piston detector signal (yellow
LED lights up).
• Check for correct lubrication volume at
the lubrication points.
See Figure 6
5.3 Conducting initial functional test
For kit version with shielding sleeve
• During the following installation of
the shielding sleeve, make sure that it is
not damaged by the thread of the piston
detector.
• Slip the shielding sleeve (9) over the pis-
ton detector (8) until it fits firmly on the
front of the metering device.
• Align the shielding sleeve (9) so that the
LED on the piston detector
is visible
(through shielding sleeve bore (10))
• Connect electrical connection cable
(provided by customer) (2) to the piston
detector (8).

EN 6. Malfunctions, causes, and remedies
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Version 01
6. Malfunctions, causes, and remedies
Malfunctions table
Malfunction Possible cause Remedy
No
Metering
device
signal
○Socket of piston detector not con-
nected or connected incorrectly • Check plug contacts
• Install socket correctly
○Signal line is broken • Check signal line
○Piston detector is not installed
correctly • Check engagement depth of adapter and piston detector, tighten if necessary
○Piston detector overtightened • Disconnect piston detector, perform functional test, replace piston detector if damaged
○Wrong adapter used • Use only an adapter approved for the piston detector (see marking, adapter surface has two
rings, see diagram in Technical data chapter).

EN
6. Malfunctions, causes, and remedies
6
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Version 01
Malfunctions table
If, after working through the fault causes (previous page), there is still a malfunction in the metering device signal (continuous
signal or missing signal), proceed as follows:
Malfunction Possible cause Remedy
Continuous signal
○Positive magnetic field that is present beyond the
permissible immunity margin
without shielding sleeve > 0.2 mT
with shielding sleeve 0.7 mT
Requirements:
The metering device must be functioning correctly, and the piston
detector must be connected correctly.
• Check for any excessive magnetic fields in the assembly area of the
metering device. Proceed as follows:
• Remove the metering device with piston detector from the in-
stallation location and carry out a functional test of the piston
detector installed in the metering device.
• If the fault (continuous signal or missing signal) no longer occurs,
suitable measures should be taken to prevent the excessive magnetic
field. Contact SKF Service for assistance.
• If the fault (missing change of signal) continues to occur, return the
entire metering device to SKF Service/your dealer - see the manufac-
turer's address on page 3).
Missing signal ○Negative magnetic field beyond the permissible im-
munity margin (less than < -0.7 mT)

EN 6. Malfunctions, causes, and remedies
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Version 01
Prohibited connections for the piston detector 2340-00000026
Malfunction Possible cause Remedy
Short circuit!
If pin 4 is connected to pin 3
(ground), a short circuit will
result!
When activated, the detector
will flicker due to short circuit
detection by the detector
Piston detector 2340-00000026 connected incorrectly
• Connect the piston detector in accordance
with Chapter 4.2, Connection options
2340-00000026, 3-wire PNP
Short circuit!
If pin 2 is connected to pin 3
(ground), a short circuit will
result!
When activated, the detector
will flicker due to short circuit
detection by the detector
1
2
3
4
12
34
+ 12-24 V DC
br
ws
sw
bl 0 V DC (ground)
load
wrong
connection
1
2
3
4
1
2
3 4
+ 12-24 V DC
br
ws
sw
bl
0 V DC (ground)
load
wrong
connection
Incorrect
connection
Incorrect
connection

EN
7. Spare parts
7
6
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Version 01
7. Spare parts
WARNING!
Adapters can be changed only on depressurized metering devices!
VPK VPB VPB with shortened stroke (VH) Quantity
Piston detector 2340-00000026
1x each
O-ring 96-9120-0062 WVN501-10x1 WVN501-10x1
Adapter for piston detector 44-0159-2515 44-0159-2519 44-0159-2518
Shielding sleeve for piston detector 44-0811-2130 44-0811-2129 44-0811-2129
Kit Order no. 24-0159-6029 24-0159-6034 24-0159-6033

951-150-037-EN
February 2020
Version 01
SKF Lubrication Systems Germany GmbH
Walldorf Plant
Heinrich-Hertz-Str. 2-8
DE - 69190 Walldorf
Tel.: [phone]
Fax: [phone]
E-mail: Lubrication-german[email protected]om
www.skf.com/lubrication
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