Schaeffler FAG HYDNUT-E Series User manual

Hydraulic Nuts
HYDNUT..-E, HYDNUT..-E-INCH
User manual

Foreword
New designation The new hydraulic nuts can be identified from the -E in
the designation. The E stands for Enhanced and this means that
some improvements have been made.
Measuring
the drive-up distance
At first sight, it is not possible to identify the new piston form,
but it is precisely this characteristic that gives a major advantage:
the drive-up distance can be measured simply using a conventional
dial gauge. This is fitted in the hole for the dial gauge and is located
by hand using a knurled clamping screw made from plastic.
The tip of the measuring pin lies flat on the new collar of the piston,
which means that the stroke can be measured precisely.
Marking The marking is also a new feature. Each hydraulic nut is marked
with the maximum permissible pressure and the thread present.
This facilitates reliable operation and damage-free mounting.
Mounting and dismounting Mounting and dismounting is aided by the hand lever now supplied.
This is inserted in a handling hole and, as a result, the hydraulic nut
can be easily screwed and unscrewed.
If maintenance or repair becomes necessary at any time, the new
dismounting screws made from corrosion-resistant steel give
considerable benefit in dismounting. The annular piston can thus
be unscrewed uniformly from the press ring.
The maximum stroke is indicated by a red O ring, thus reliably
preventing excessive outward movement of the piston and all
the resulting consequences. Simple visual inspection is sufficient
during use.
Current version A current version of this user manual can be found at
http://medien.schaeffler.com using the search term BA4.

2 BA 04 Schaeffler Technologies
Page
Contents
About the user manual Symbols ................................................................................... 4
Availability................................................................................ 4
Legal guidelines........................................................................ 4
Original user manual................................................................. 4
General
safety guidelines
Usage for the intended purpose ................................................ 5
Usage not for the intended purpose........................................... 5
Qualified personnel .................................................................. 5
Hazards .................................................................................... 5
Protective equipment ................................................................ 5
Safety regulations ..................................................................... 6
Scope of delivery ................................................................................................. 7
Accessories .............................................................................. 8
Further information ................................................................... 8
Damage during transit............................................................... 8
Defects ..................................................................................... 8
Description Press ring.................................................................................. 9
Annular piston .......................................................................... 9
Sealing rings............................................................................. 9
Red O ring................................................................................. 9
Press ring.................................................................................. 10
Annular piston .......................................................................... 14
Other components .................................................................... 15
Function ................................................................................... 17
Commissioning Checking the hydraulic nut........................................................ 20
Lifting the hydraulic nut out of the transport container and
transporting the hydraulic nut ................................................... 21
Preparation for mounting .......................................................... 23
Mounting the hydraulic nut ....................................................... 25

Schaeffler Technologies BA 04 3
Page
Applying the mounting ring ....................................................... 32
Applying the intermediate ring .................................................. 33
Selecting and mounting the dial gauge...................................... 34
Selecting the pressure generation device .................................. 37
Operation Drive-up distance ..................................................................... 38
Hydraulic oil ............................................................................. 38
Maximum pressure ................................................................... 39
Mounting the hydraulic hose..................................................... 40
Bleeding................................................................................... 42
Pressing the component into place ........................................... 44
Pressing back the annular piston
HYDNUT50-E to HYDNUT190-E................................................... 47
Pressing back the annular piston
HYDNUT200-E to HYDNUT1180-E............................................... 48
Decommissioning Storage .................................................................................... 54
Troubleshooting ................................................................................................ 55
Maintenance Maintenance plan..................................................................... 56
Ordering the seal...................................................................... 56
Replacing the seal .................................................................... 56
Dismounting the annular piston................................................ 57
Dismounting the seals .............................................................. 58
Cleaning the components ......................................................... 59
Mounting the seals ................................................................... 60
Mounting the annular piston..................................................... 61
Disposal Regulations .............................................................................. 63
Technical data, accessories
and replacement parts
................................................................................................ 64
Appendix EC Declaration of Conformity..................................................... 65

4 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
About the user manual This user manual is part of the product and contains important
information.
Symbols The warning and hazard symbols are defined in accordance
with ANSI Z535.6-2006.
WARNING
In case of non-compliance, death or serious injury may occur. 
CAUTION
In case of non-compliance, minor or slight injury will occur. 
NOTICE
In case of non-compliance, damage or malfunctions in the product or
the adjacent construction will occur.

Availability This user manual is supplied with each hydraulic nut and can also
be ordered retrospectively. An electronic version (.pdf) is available
in the Mediathek on the Schaeffler page of the Internet.
WARNING
Serious injuries may occur due to the escape under high pressure
of hydraulic oil in the absence of important information for the user
since the user manual is incomplete, illegible or absent.
As the safety coordinator, you must ensure that this user manual is
always complete and legible and that any persons using hydraulic
nuts have the user manual available.

Legal guidelines The information in this manual corresponded to the most recent
status at the close of editing. The illustrations and descriptions
cannot be used as grounds for any claims relating to devices that
have already been delivered. Schaeffler Technologies AG & Co. KG
accepts no liability for any damage or malfunctions if the device or
accessories have been modified or used in an inappropriate manner.
Original user manual The original user manual is taken to be a user manual in
the German language. A user manual in another language is to be
taken as a translation of the original user manual.

Schaeffler Technologies BA 04 5
General safety guidelines It describes how the hydraulic nut may be used, who may use
the hydraulic nut and what must be observed in general during its
use.
Usage
for the intended purpose
In the case of hydraulic nuts, usage for the intended purpose
comprises the mounting and dismounting of rolling bearings
as well as the mounting and loosening of press fits such as ships’
propellers and rubber blades, shaft couplings and gears.
Usage not
for the intended purpose
The hydraulic nut must not be used to lift loads. Unilateral loading
is not possible, instead load must be applied uniformly over
the circumference of the annular piston.
Usage not for the intended purpose can lead to injury or damage.
Qualified personnel The hydraulic nut must only be used by suitably qualified personnel.
A person defined as qualified personnel:
■ has all the necessary knowledge
■ has been trained in working on rolling bearings and hydraulic
tools
■ is aware of all the hazards and safety guidelines
■ is authorised to use a hydraulic nut by the safety co-ordinator
■ has fully read and understood this user manual.
Hazards If a hydraulic nut is damaged, hydraulic oil may be sprayed out under
high pressure. For this reason, only an undamaged hydraulic nut may
be used and repairs to the hydraulic nut are therefore prohibited.
Protective equipment Personal protective equipment is intended to protect operating
personnel against health hazards. This comprises safety goggles,
safety shoes and gloves and these must be used in the interests
of personal safety.

6 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Safety regulations The following safety specifications must be observed when working
with the hydraulic nut. Further guidelines on hazards and specific
operating procedures can be found, for example, in the descriptions
of the operation of hydraulic nuts, see page 38.
Safety specifications for the pressure generation device can be
found in the user manual of the pressure generation device.
Transport If the ambient conditions during transport differ to a large extent
from the ambient conditions specified for its operation, usage of
the hydraulic nut must be stopped immediately.
The hydraulic nut must always be stored and operated under
the ambient conditions described. Before storage, preservative must
be applied to the hydraulic nut in order to give protection against
corrosion.
Unsuitable ambient conditions can endanger the health of
the operating personnel.
The hydraulic nut must not be operated at a pressure greater than
the maximum permissible operating pressure.
These ambient conditions are as follows:
■ humidity max. 65%, non-condensing
■ no aggressive chemicals in the environment
■ temperature from +5 °C to +40 °C
■ clean environment.
Maintenance The hydraulic nut must undergo regular maintenance, see page 56.
Only original replacement parts may be used.
Conversion The hydraulic nut must not be converted.

Schaeffler Technologies BA 04 7
Scope of delivery The scope of delivery comprises the hydraulic nut, accessories and
user manual, see
table and Figure 1 .
Hydraulic nut HYDNUT
1)
Allocation, see tables , page 12.
2)
Allocation, see tables , page 11.
Component Designation Quan-
tity
Hydraulic nut HYDNUT 1
Clamping screw – 3
Screw plug (G
1/4
)HYDNUT.PLUG 2
Dismounting screw
1)
– 3
5
Valve nipple (G
1/4
)PUMP1000.VALVE-NIPPLE 1
Hand lever
2)
HYDNUT-HANDHEBEL-D10.PRT 1
HYDNUT-HANDHEBEL-D12.PRT 1
HYDNUT-HANDHEBEL-D16.PRT 1
Seal set
(replacement outer seal,
replacement inner seal and
red O ring)
HYDNUT...SEAL 1
User manual – 1
 Hydraulic nut
 Clamping screws
 Screw plug
 Dismounting screws
 Hand lever
 Valve nipple
 Replacement seals for outer side,
inner side and red O ring
 User manual
Figure 1
Scope of delivery
HYDNUT...-E(-INCH)
000B0603000B0603

8 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Accessories Hydraulic nuts are supplied with the appropriate replacement seals.
Other accessories are available, see page 64.
Further information The scope of delivery does not include the following documents:
■ TPI 195, FAG Pressure Generation Devices
■ TPI 196, Hydraulic Nuts HYDNUT
■ MH 1, Mounting of Rolling Bearings
■ WL 80110, Reduction in Radial Internal Clearance in Mounting
of FAG Spherical Roller Bearings with Tapered Bore.
Damage during transit Any damage during transit must be reported as a complaint to
the carrier.
Defects Any defects must be reported promptly to Schaeffler Technologies
AG & Co. KG.

Schaeffler Technologies BA 04 9
Description All hydraulic nuts are of a similar design. They have a metric,
trapezoidal or inch size thread on the inner cylindrical surface of
the annular piston. Accessories are necessary for operation.
A hydraulic nut comprises a press ring, in which a movable annular
piston is located. Between these two components is a ring gap filled
with hydraulic oil. This is sealed by means of two seals,
Figure 2 .
Press ring The single piece press ring made from steel supports the movable
annular piston.
Annular piston The single piece annular piston is made from steel.
The annular piston has two slots for sealing rings and one flat slot
for the red O ring.
Sealing rings Two sealing rings made from soft PVC are inserted in corresponding
slots in the annular piston and seal off the ring gap between
the annular piston and the press ring. This prevents escape of
the hydraulic oil in the ring gap.
Red O ring The red O ring is made from PVC and indicates that the annular
piston may only be moved out as far as this position.
 Press ring
 Annular piston, hardened
 Sealing ring, PVC
 Red O ring
Figure 2
Hydraulic nut
000B05FA000B05FA

10 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Press ring The single piece press ring supports the movable annular piston and
has a thread on the inner cylindrical surface,
Figure 3 .
Thread
on inner cylindrical surface
In order to allow mounting on the thread of a shaft, withdrawal
sleeve or adapter sleeve, the inner cylindrical surface has a metric
fine pitch thread, a trapezoidal thread or an inch size thread.
Threaded hole
for folding clevis
A suitable folding clevis can be screwed into this threaded hole
in the outer cylindrical surface.
Folding clevis The complete hydraulic nut can be transported using a folding
clevis of sufficient load carrying capacity (not included in the scope
of delivery).
Alternatively, a round sling or steel rope of sufficient load carrying
capacity can be used for transport. The steel rope may only be
wrapped around the outer cylindrical surface of the press ring.
 Thread
on inner cylindrical surface
 Threaded hole
for folding clevis
 Folding clevis
 Handling hole
 Threaded hole
for dismounting screw
 Dismounting screw
 Threaded hole G
1/4
 Screw plug, SW 6
 Hole for dial gauge,
diameter 8 mm
 Threaded hole
for clamping screw
 Clamping screw, M4
Figure 3
Press ring
000B05F1000B05F1

Schaeffler Technologies BA 04 11
Handling holes Depending on the size, there are two, four or six pairs of handling
holes. In each case, two holes are always arranged opposite each
other, with one hole in the end face and the other in the outer
cylindrical surface. If the hand lever is inserted in the handling hole,
the press ring can be rotated more easily.
HYDNUT..-E
HYDNUT..-E-INCH
A hand lever made from steel is included in the scope of delivery.
NOTICE
Damage to the handling holes and thus irreparable damage to
the press ring due to the use of an unsuitable hand lever.
Only use hand levers that are of precisely the stated diameter and
up to the maximum stated length.

Hand lever
for HYDNUT..-E
Hand lever
for HYDNUT..-E-INCH
Designation Quantity Diameter
from to mm
HYDNUT50-E HYDNUT195-E 2 ⫻ 210
HYDNUT200-E HYDNUT395-E 4 ⫻ 212
HYDNUT400-E HYDNUT1180-E 6 ⫻ 216
Designation Quantity Diameter
from to mm
HYDNUT90-E-INCH HYDNUT195-E-INCH 2 ⫻ 210
HYDNUT200-E-INCH HYDNUT380-E-INCH 4 ⫻ 212
HYDNUT400-E-INCH HYDNUT530-E-INCH 6 ⫻ 216
Designation Length Diameter
from to mm mm
HYDNUT50-E HYDNUT190-E 150 10
HYDNUT200-E HYDNUT395-E 250 12
HYDNUT400-E HYDNUT1180-E 300 16
Designation Length Diameter
from to mm mm
HYDNUT90-E-INCH HYDNUT190-E-INCH 150 10
HYDNUT200-E-INCH HYDNUT380-E-INCH 250 12
HYDNUT400-E-INCH HYDNUT530-E-INCH 300 16

12 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Threaded holes
for dismounting screws
The press ring has three or five threaded holes for dismounting
screws. If all dismounting screws are uniformly tightened,
the annular piston is pressed out of the press ring, see page 57.
Dismounting screws At the time of delivery, dismounting screws with flat end to
ISO 4026, DIN 913 are screwed into the dismounting holes and
are used for dismounting of the annular piston. The material
selected was corrosion-resistant steel, in order to prevent problems
due to corrosion.
HYDNUT..-E
HYDNUT..-E-INCH
Threaded holes G
1/4
The press ring has two oil ducts. The extension of each oil duct has
a threaded hole G
1/4
.
At an offset of 15° to the threaded hole for the folding clevis,
the outer cylindrical surface has a radial threaded hole G
1/4
. During
operation, the hole is used for bleeding. At the time of delivery,
a valve nipple is screwed in at this point.
At an offset of 180° to this hole, the end face has a second threaded
hole G
1/4
. During operation, the valve nipple is screwed into these
holes. At the time of delivery, the screw plug is screwed in at this
point.
Designation Quantity Thread
from to
HYDNUT50-E HYDNUT195-E 3M5
HYDNUT200-E HYDNUT395-E 3M6
HYDNUT400-E HYDNUT715-E 5M8
HYDNUT720-E HYDNUT1180-E 5M10
Designation Quantity Thread
from to
HYDNUT90-E-INCH HYDNUT190-E-INCH 3M5
HYDNUT200-E-INCH HYDNUT380-E-INCH 3M6
HYDNUT400-E-INCH HYDNUT530-E-INCH 5M8

Schaeffler Technologies BA 04 13
Screw plug One of the two threaded holes G
1/4
can be fitted with the screw
plug supplied. At the time of delivery, the screw plug is screwed into
the axial threaded hole G
1/4
.
Hole for dial gauge The hole through the press ring is used to locate a dial gauge and
has a diameter of 8 mm.
Threaded hole
for clamping screw
At an angle of 90° to the hole for the dial gauge is a threaded hole
for locating a clamping screw.
Clamping screw The clamping screw made from plastic is knurled and can be tight-
ened or loosened without the use of a tool. It locates the clamping
shank of the mounted dial gauge. The material of the screw was
selected such that the clamping shank is not damaged by the screw.
HYDNUT..-E
HYDNUT..-E-INCH
Designation Length Thread
from to mm
HYDNUT50-E HYDNUT195-E 6M4
HYDNUT200-E HYDNUT925-E 10 M4
HYDNUT930-E HYDNUT1180-E 15 M4
Designation Length Thread
from to mm
HYDNUT90-E-INCH HYDNUT190-E-INCH 6M4
HYDNUT200-E-INCH HYDNUT530-E-INCH 10 M4

14 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Annular piston The single piece annular piston is made from steel. The annular
piston has two slots for sealing rings and one flat slot for the red
O ring. At or above a stipulated size, there are three threaded holes
in the annular piston,
Figure 4 .
Slots for sealing rings Two slots support the sealing rings made from soft PVC.
Slot for red O ring A flat slot supports the red O ring made from PVC.
Threaded holes for eye bolts In the case of hydraulic nuts HYDNUT410 or larger, there are
threaded holes in the annular piston. At the pitch circle, the holes
have a spacing of 120° to each other. If eye bolts are screwed
into these threaded holes, the annular piston can be transported
by means of a lifting device, see page 58.
HYDNUT..-E
HYDNUT..-E-INCH
 Slot for sealing ring
 Slot for red O ring
 Threaded hole for eye bolt
Figure 4
Annular piston
000B05E8000B05E8
Designation Thread
from to
HYDNUT410-E HYDNUT595-E 3 ⫻ M6
HYDNUT600-E HYDNUT1180-E 3 ⫻ M8
Designation Thread
from to
HYDNUT410-E-INCH HYDNUT530-E-INCH 3 ⫻ M6

Schaeffler Technologies BA 04 15
Other components For operation, the hydraulic nut requires a hydraulic line and
a pressure generation device filled with hydraulic oil,
Figure 5 .
Hydraulic line The points stated below are only a selection. Ensure that all
guidelines from the manufacturer of the hydraulic line are observed.
The hydraulic line:
■ must fulfil all legal requirements valid at the point of use
■ must be checked before each use
■ must not be damaged
■ must be approved for the operating pressure
■ must be suitable for the hydraulic oil used
■ must not exceed the maximum permissible operating period.
Further information on the hydraulic line used is given in
the documentation for the hydraulic line.
 Hydraulic nut
 Hydraulic line
 Pressure generation device
 Hydraulic oil
Figure 5
Equipment
000B05DF000B05DF

16 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Pressure generation device The points stated below are only a selection. Ensure that all
guidelines from the manufacturer of the pressure generation device
are observed.
The pressure generation device:
■ must fulfil all legal requirements valid at the point of use
■ must be checked before each use
■ must not be damaged
■ may only be operated at a pressure that is lower than
the maximum permissible pressure of the hydraulic nut
■ must have a sufficiently large tank, see page 37.
Further information on the pressure generation device used is given
in the documentation for the pressure generation device.
Hydraulic oil The hydraulic oil used must correspond to a particular viscosity
class, see page 64.

Schaeffler Technologies BA 04 17
Function The end face threaded hole G
1/4
is used for a screwed-in valve
nipple G
1/4
. The pressure generation device and valve nipple are
then connected with each other by means of a hydraulic line.
In the pressure generation device, hydraulic oil is placed under high
pressure and flows into the hydraulic nut. When oil without air
bubbles escapes from the second (upper) threaded hole G
1/4
,
the hydraulic nut has been bled.
The screw plug is then screwed into the upper threaded holes G
1/4
.
This creates a closed pressure chamber.
In the pressure generation device, hydraulic oil is placed under high
pressure and flows into the pressure chamber. The annular piston
undergoes movement,
Figure 6 .
 Pressure generation device
 Hydraulic line
 Hydraulic nut, threaded hole G
1/4
 Valve nipple G
1/4
 Pressure chamber
 Screw plug
 Direction of movement of annular
piston
Figure 6
Functional principle
000B05D6000B05D6

18 BA 04 Schaeffler Technologies
Hydraulic nuts
HYD-NUT..-E, HYDNUT..-E-INCH
Mounting In the mounting of rolling bearings, the end face of the annular
piston presses on the end face of the bearing inner ring, withdrawal
sleeve or mounting plate,
Figure 7 .
Mounting on and dismounting from an adapter sleeve can be carried
out using the oil pressure method. In this method, an additional
pressure generation device is used to press hydraulic oil between
the fit surfaces of the sleeve and bearing inner ring as well as
between the sleeve and shaft.
 Mounting on shaft
 Mounting on adapter sleeve,
oil pressure method
 Mounting on withdrawal sleeve
 Mounting on withdrawal sleeve,
oil pressure
Figure 7
Mounting method
000B025C000B025C