Bosch Rexroth Hagglunds VI 44 Series Manual

Hägglunds VI
Radial piston hydraulic motor
Installation and maintenance
manual
RE 15310-WA/10.2015
Supersedes:
EN 323-23br/2011
English

The data specied above only serve to describe
the product. No statements concerning a
certain condition or suitability for a certain
application can be derived from our informa-
tion. The information given does not release
the user from the obligation of own judgment
and verication. It must be remembered that
our products are subject to a natural process of
wear and aging.
© This document, as well as the data, specica-
tions and other information set forth in it, are
the exclusive property of Bosch Rexroth AG. It
may not be reproduced or given to third parties
without its consent.
Changes in the equipment may occur. We there-
fore reserve the right to introduce amendments
in the manual as we deem necessary without
notice or obligations.
This Installation and Maintenance Manual is val-
id for motor series 44, 64 and 84 manufactured
after 95-01-01. For older motors please contact
your nearest Bosch Rexroth representative.
The cover shows an example conguration. The
product supplied may therefore dier from the
gure shown.
The original operating instructions were pre-
pared in English.

Hägglunds VI, RE 15310-WA/10.2015, Intallation and maintenance manual, Bosch Rexroth Mellansel AB
3/68 Contents
Contents
Preface 2
1 General 4
1.1 Safety precautions 4
1.2 Motor data 5
1.3 Functional description 6
2 Technical data 8
2.1 Recommended charge pressure 8
2.2 Noise from a complete installation 9
2.3 Choice of hydraulic uid 10
Environmentally acceptable uids 11
3 Installation 12
3.1 Mounting instruction 12
3.1.1 Common lifting methods 13
3.1.2 Motor – rope drum – shaft adapter 15
3.1.3 Motor – valves 17
3.1.4 Motor – torque arm 18
3.1.5 Motor – front bracket 23
Mounting of bracket BB-46 and BB-85 on foundation 25
Mounting of winch on foundation 27
Brake assembly BA-43 and BA-63 28
Brake assembly BA-85 34
Brake cylinder BCI-M for brake assembly BA-43, BA-63 and BA-85 38
Draining of brake cylinders 40
Installation of brake assembly BA-43, BA-63 single acting
and brake cylinder BCI-M 41
Installation of brake assembly BA-43,
BA-63 double acting and brake cylinder BCI-M 42
Installation of brake assembly BA-85 single
+ double acting and brake cylinder BCI-M 44
3.2 Oil connections 47
3.2.1 Oil connections, motor without valve, series 44 and 64 47
3.2.2 Oil connections, motor series 84 48
3.2.3 Oil connections, V46-C 50
3.2.4 Oil connections, V46-O 51
3.3 Reversal of rotation 52
4 Handling 54
4.1 Instructions for storage 54
4.2 Before commissioning 55
4.3 Commissioning 55
4.4 Periodic maintenance 56
4.4.1 Cleaning and care 59
4.5 Disposing 59
5 Fault nding 60
6 Drawings 62
7 Declaration of incorporation 64

4/68 General
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
1 General
1.1 Safety precautions
It is of high importance that the Safety precautions are always followed, if you are
unsure about something, please do not hesitate to contact your nearest Hägglunds
oce for advice.
•Warning signs. In this manual you will nd the following signs which indicate a
potential hazard, which can or will cause personal injury or substantial property
damage. Depending on the probability of the hazard, and how serious the injury or
property damage could be, there are three levels of classication.
Warning sign, signal word Meaning
DANGER Indicates a dangerous situation which may cause death or
severe personal injuries if not avoided.
WARNING Indicates a dangerous situation which may cause death or
severe personal injuries if not avoided.
CAUTION Indicates a dangerous situation which may cause minor or
medium personal injuries if not avoided.
NOTICE Damage to property: The product or the environment could
be damaged.
•Application area. All new and rebuild applications, should always be approved and
supervised by Hägglunds personnel.
•Mounting. Carefully follow the instructions and be aware of the high weights and
forces during lifting.
•Before starting up. Before starting up new, rebuild or just worked on applications,
all accessories and safety arrangements functions, should be controlled/tested.
•Periodic maintenance. Notice the intervals in maintenance chart (4.4) and keep a
record.
•Dismounting. Carefully follow the instructions and be aware of the high weights
and forces during lifting.

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1.2 Motor data
Motor type
Full displacement
Max.***
pressure
Displacement shift
Ratio
Displace-
ment
Specic
torque**
Rated
speed*
Max.
Speed
Displace-
ment
Specic
torque**
Rated
speed*
Max.
speed
ViTsn n p ViTsn n
44-03300 3 325 53 100 200 320 1 662 26 100 200 1:2
44-04700 4 710 75 100 200 320 2 356 37 100 200 1:2
44-06800 6 790 108 90 170 320 3 393 54 90 170 1:2
44-09200 9 240 147 80 145 320 4 618 74 80 145 1:2
64-11100 11 080 176 70 120 320 5 542 88 70 120 1:2
64-13500 13 599 215 60 110 250 6 750 107 60 110 1:2
64-16300 16 340 260 50 100 250 8 171 130 50 100 1:2
84-14800 14 840 236 55 90 320 –––––
84-17900 17 961 286 55 85 320 –––––
84-21300 21 375 340 55 80 320 –––––
84-25100 25 090 399 55 75 320 –––––
84-38000 38 000 605 40 60 250 – – – – –
84-22300 22 300 355 55 55 320 11 150 177 60 85 1:2
84-33800 33 780 538 35 35 250 16 889 269 50 70 1:2
84-25100 25 090 399 40 55 250 8 362 133 45 75 1:3
84-38000 38 000 605 25 35 250 12 667 202 35 60 1:3
84-25100 25 090 399 40 55 250 16 724 266 45 75 2:3
* Related to a required charge pressure of 12 bar (175 psi) for motors in braking mode. Special considerations regarding charge
pressure, cooling and choice of hydraulic system for speeds above rated.
** Theoretical value
*** The motors are designed according to DNV-rules. Test pressure 70 bar (1000 psi) above max. pressure. Peak/transient pressure
70 bar (1000 psi) above max. pressure is allowed to occur 10000 times.
Quantity
Displacement
Specic torque
Speed
Pressure
Symbol
Vi=
Ts=
n =
p =
Metric
cm3/rev
Nm/bar
rpm
bar
US
in3/rev
lbf·ft/1000 psi
rpm
psi

6/68 General
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Motor type
Full displacement
Max.***
pressure
Displacement shift
Ratio
Displace-
ment
Specic
torque**
Rated
speed*
Max.
Speed
Displace-
ment
Specic
torque**
Rated
speed*
Max.
speed
ViTsn n p ViTsn n
44-03300 203 2 695 100 200 4 650 101 1 347 100 200 1:2
44-04700 287 3 814 100 200 4 650 144 1 907 100 200 1:2
44-06800 414 5 492 90 170 4 650 207 2 746 90 170 1:2
44-09200 564 7 475 80 145 4 650 282 3 738 80 145 1:2
64-11100 676 8 971 70 120 4 650 338 4 485 70 120 1:2
64-13500 823 10 935 60 110 3 600 411 5 467 60 110 1:2
64-16300 997 13 227 50 100 3 600 499 6 613 50 100 1:2
84-14800 906 12 017 55 90 4 650 – – – – –
84-17900 1 096 14 546 55 85 4 650 – – – – –
84-21300 1 304 17 292 55 80 4 650 – – – – –
84-25100 1 531 20 306 55 75 4 650 – – – – –
84-38000 2 320 30 756 40 60 3 600 – – – – –
84-22300 1 361 18 048 55 55 4 650 680 9 024 60 85 1:2
84-33800 2 064 27 339 35 35 3 600 1 031 13 669 50 70 1:2
84-25100 1 531 20 306 40 55 3 600 510 6 769 45 75 1:3
84-38000 2 319 30 756 25 35 3 600 773 10 252 35 60 1:3
84-25100 1 531 20 306 40 55 3 600 1 021 13 537 45 75 2:3
84-38000 2 319 30 756 25 35 3 600 1 546 20 504 35 60 2:3
* Related to a required charge pressure of 12 bar (175 psi) for motors in braking mode. Special considerations regarding charge
pressure, cooling and choice of hydraulic system for speeds above rated.
** Theoretical value
*** The motors are designed according to DNV-rules. Test pressure 70 bar (1000 psi) above max. pressure. Peak/transient pressure
70 bar (1000 psi) above max. pressure is allowed to occur 10000 times.
Quantity
Displacement
Specic torque
Speed
Pressure
Symbol
Vi=
Ts=
n =
p =
Metric
cm3/rev
Nm/bar
rpm
bar
US
in3/rev
lbf·ft/1000 psi
rpm
psi
1.3 Functional description
The Hägglunds VI motors are of radial piston type with rotating case. The case
is supported on the stationary cylinder block (5) by two main bearings. An even
number of radially positioned pistons (3) work in cylinder bores in the cy linder
block, which also houses the inlet and o ut let ports (A and C). Each piston is coupled
by a piston rod (2) to a cross head pin (6) upon which four cam rollers (7) are
mounted. The two inner cam rollers press against the cam ring (8) while the two
outer rollers work with in their respective guide plates (1). The cam ring is anchored
to the rotating case. The distributor (4) directs the input oil to the pistons during
their work strokes and re turns the exhausted oil back to the tank. The distributor is
coupled to the rotating case via a safety coupling (9).
The motor can be connected to a driven machine via two mounting surfaces on the
rear end of the motor.

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The symmetrical design of the motor has made it possible to construct it as a
2-speed motor. This means that two dierent speeds are obtained for a given ow.
The simplest way of performing displacement change over is by connecting a spe-
cial valve, known as a 2-speed valve, direct to the connecting ange on the cy linder
block.
The motor is designed so that pressure pulsations in the motor case are avoided.
This has the advantage that impurities are not sucked into the case.
9. Safety coupling
8. Cam ring
6. Cross head pin
7. Cam rollers
2. Piston rod
3. Piston
4. Distributor
1. Guide plate
5. Cylinder block
A = Port A
C = Port C
Fig. 1: The Hägglunds VI motor

8/68 Technical data
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
2 Technical data
2.1 Recommended charge pressure
The motor must be connected to the hyd raulic system so that it receives sucient
charge pressure at the low pressure connection. This applies to all types of
installations.
WARNING
In hanging load applications, charge pressure at motors connection must be
according to graph below under all conditions.
Two alternatives of motor duty must be considered:
1. The graph is for motors, used in half displacement connection (“high speed
range”) or operating as a braking unit (during hydrostatic braking).
2. When motors are operating exclusively in driving mode, the charge pressure is
30% of the graph values but may not be below 2 bar/29 psi.
44-, 64- and 84-series:
Max case pressure is 3 bar/43.5 psi (for 1% of the operation time evenly di vided,
pressure peaks of max 5 seconds up to 8 bar/116 psi are allowed).
The max permitted case pressure at standstill is 8 bar/116 psi.
For motors tted with silicon-rubber seals these pressures must be reduced by 50%.
n r/min
0
2
4
6
8
10
12
14
16
p
cbar
p
cpsi
0102030405060708090 100
44-04700
64-13500 44-09200
64-11100
64-16300
44-06800
50
100
150
200
Valid for 1 bar / 14.5 psi case pressure
With increased case pressure, the charge
pressure must be increased accordingly.
Fig. 2: Charge pressure

Technical data 9/68
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0
2
4
6
8
10
12
14
01020304050 rpm
100
200
p
cbar
p
cpsi
84-38000
84-14800
84-17900
84-21300
84-25100
Valid for 1 bar (14.5 psi) case pressure.
With increased case pressure, the charge
pressure must be increased accordingly.
Fig. 3: Valid for A- and B-type motors without 2-speed valve
0
2
4
6
8
10
12
14
0102030405060
100
200
p
c
bar
p
cpsi
84-38000 84-22300
rpm
Valid for 1 bar (14.5 psi) case pressure.
With increased case pressure, the charge
pressure must be increased accordingly.
rpm
Fig. 4: Valid for A- and B-type motors with 2-speed valve
2.2 Noise from a complete installation
Pump motor Pipe noise Hydraulic motor Noise from driven unit
Foundation and construction noise
Background noise
Remarks:
Background noise
The background noise can not normally be inuenced but is usually known or easy to
measure.
Pump unit
The pump unit is a known noise source.

10/68 Technical data
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Pipe noise
The pipe noise is probably the source of the majority of mistakes in installations: all
pipe clamps should be of vibration insula ting type secured to concrete ceiling, wall
or oor. Securing to non-rigid metal struc tures or structures likely to give resonance
must be avoided.
Hydraulic motor
The hydraulic motor is a known noise source. (Tables of sound data – see subsection
4.9 in the Engineering Manual).
Driven unit
The driven unit is an unknown noise sour ce (for us) but can through certain
information probably be obtained from the supplier. When securing the torque arm
of a hydraulic motor to foundation of the casing of a driven machine, it is highly
important to study the construction of the foundation or casing. This may well be the
most impor tant factor to consider, since many struc tures may give rise to resonance
with se vere noise problems as a result.
2.3 Choice of hydraulic uid
The Hägglunds hydraulic motors are primarily designed to operate on conven tional
petroleum based hydraulic oils. The hydraulic oil can be chosen in consultation with
the oil supplier of your local sales o ce, bearing the following requirements in mind:
General
The oil shall have FZG (90) fail stage minimum 11 des cribed in IP 334 (DIN 51354).
The oil must also contain inhibitors to prevent oxidation, corrosion and foaming. The
viscosity of mineral oil is highly de pen dant of the temperature. The nal choice of oil
must depend on the operating temperature that can be expected or that has been
established in the system and not in the hydraulic tank. High temperatures in the
system greatly re du ce the service life of oil and rubber seals, as well as resulting in
low viscosity, which in turn provides poor lubrication.
Content of water shall be less than 0.1%. In Industrial applications, the content of
water shall be less than 0.05%.
Recommended viscosity at operating temperature 40-150 cst/187-720 ssu.
Temperature limits
Normal operating temperature should be less than +50 °C (122 °F)
Nitrile seals (std motor)
Viton seals
-35° C to +70° C
-20° C to +100° C
Nitrile seals (std motor)
Viton seals
-31° F to +158° F
-4° F to +212° F

Technical data 11/68
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Viscosity limits
Viscosity index
=100 recommended
=150* for operation with large
temperature dierence
Min. permitted in continuous duty
Min. permitted in intermittent duty
Max. permitted
40 cSt/187 SSU
20 cSt/98 SSU**
10000 cSt/48000 SSU
* Many hydraulic uids with VI-improvers are subject to temporary and permanent reductions
of the viscosity.
** Low viscosity gives reduced service life for the motors and reduction of max. allowed
power for “Hägglunds VI”.
Fire resistant uids
Operating with re resistant uids
The following uids are tested for Hägglunds motors: (ISO/DP 6071)
Fluid Approved Seals Internal paint
HFA: Oil (3-5%) in water emulsion No – –
HFB: Inverted emulsion 40-45% water in oil Yes Nitrile (std motor) Not painted*
HFC: Water-glycol Yes Nitrile (std motor) Not painted*
HFD synthetic uids
HFD:R – Phosphate esters Yes Viton Not painted*
HFD:S – Chlorinated hydrocarbons Yes Viton Not painted*
HFD:T – Mixture of the above Yes Viton Not painted*
HFD:U – Other compositions Yes Viton Not painted*
* Must be specied in the order.
IMPORTANT!
Down rating of pressure data and service life must be considered when using re resistant uid.
Hägglunds or its authorised representative must always be contacted for approval in the case of
these types of uids.
Environmentally acceptable uids
Fluid Approved Seals Internal paint
Vegetable */** Fluid HTG Yes Nitrile (std motor) –
Synthetic **/Esters HE Yes Nitrile (std motor) –
* Vegetable uids give good lubrication and small change of viscosity with dierent temperature.
Vegetable uids must be controlled every 3 months and temperature shall be less than +45 °C
(113 °F) to give good service life for the uid.
** Environmental acceptable uid gives the same service life for the drive, as mineral oil.
Filtration
The oil in a hydraulic system must always be ltered and also the oil from your
supplier has to be ltered when adding it to the system. The grade of ltration in a
hyd raulic system is a question of service life v.s. money spent on ltration.
In order to obtain stated service life it is important to follow our recommendations
concerning contamination level.

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Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
When choosing the lter it is important to consider the amount of dirt particles that
the lter can absorb and still operate satis factory. For that reason we recommend
a lter with an indicator that gives a signal when it is time to change the lter
cartridge.
Filtering recommendations
Before start-up, check that the system is thoroughly cleaned.
• 1. In general the contamination level in our motors should not exceed ISO 4406
19/15 (NAS 10).
• 2. For industrial applications the contamination level should not exceed ISO
4406:1999 18/16/13 (NAS 1638, class 7).
• 3. When lling the tank and motor case, we recommend the use of a lter with the
grade of ltration β10=75.
Explanation of “GRADE OF FILTRATION”
Grade of ltration β10=75 indicates the following:
• β10 means the size of particle ≥10µm that will be removed by ltration.
• =75 means the grade of ltration of above mentioned size of particle. The grade of
ltration is dened as number of particles in the oil before ltration in relation to
number of particles in the oil after ltration.
• Ex. Grade of ltration is β10=75.
• Before the ltration the oil contains N number of particles ≥10µm and after passing
the lter once the oil contains
N
75 number of particles ≥10µm.
• This means that =74·
N
75
N
75
N
number of particles have been ltered (= 98.6%).
3 Installation
3.1 Mounting instruction
It is important that the greatest care is taken when installing the motor, in order to
ensure correct function.
Any component which is connected to the motor and which does not full the
requirements in the following instructions, can cau se stresses which aect the
working life of the motor. For each series of motors, the per mitted radial and axial
loads are given under technical data in the Engineering Manual.
The motor is normally lled with oil up to the shaft centre. If the oil tank is
positioned above the shaft centre, the oil level will rise a corresponding amount. It
is recommended that drainage is arranged so that the motor is completely lled with
oil, especially at low speeds.
Bleeding of the motor can be carried out by help of the plug BSP 1 1/4” on the front
end cover. The motor must always be connected so that sucient charge pressure is
obtained at the low pressure connection. This is especially important at high speed
and with rapid reversing.
The drain port “D” must be connected directly (not restricted) to the tank in order
to avoid exceeding the maximum permitted case pressure. The recommended inner
dia meter for the drain line is 18 mm or 3/4” for 44, 64-series and 28 mm or 1” for
84-series.

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44-, 64- and 84-series
Max case pressure is 3 bar/43.5 psi (for 1% of the operation time evenly divided,
pressure peaks of max 5 seconds up to 8 bar/116 psi are allowed).
The max permitted case pressure at stand-still is 8 bar/116 psi.
For motors tted with silicon-rubber seals these pressures must be reduced by 50%.
On the motor there is an arrow which indicates the direction of rotation. When oil is
supplied to port “A” the motor rotates in this direction. The direction of rotation is
also given on the identity plate (see example in the gure below).
IMPORTANT!
With long drain lines, and when ushing through the motor, careful calculations must
be made to determine the line dimensions.
HIGH TORQUE HYDRAULIC MOTOR
TYPE
INDIVID. NO.
DISPLACEMENT
cm /r
3
MAX. PRESSURE
TORQUE
Nm/bar
MK -64 -16300 -AO -RN -XXXX
*
Right hand rotation
(seen from the oil connection
side of the motor)
1.1.1 Common lifting methods
Lifting of motor
Fig. 5:

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Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Steel eye bolts
Lifting points on motor cover
44, 64-series 3 x M16
84-series 3 x M20
Max 30°
Fig. 6:
WARNING
Lifting straps must be chosen with reliable safety margin over the total weight of
the lifted object.
Motor series Motor Motor + BB + BA +BCI
kg lb kg lb
44 520 1 150 808 1 785
64 750 1 653 1 038 2 288
84 1 550 3 417 2 356 5 198
Lifting of torque arm
Fig. 7: TAC 1250-B

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Fig. 8: TAC 1000-K
DANGER
Always make sure where the centre of gravity is before any lifting. Never stand
below a hanging motor or the torque arm.
Torque arm Weight
kg lb
TAC 1000-K 69 152
TAC 1250-B 120 265
1.1.2 Motor – rope drum – shaft adapter
Mounting of rope drum or shaft adapter
Clean the mounting surfaces carefully before assembly. (This is a friction joint).
Tighten the bolts to the correct tightening torque. All bolts shall be lubricated with
oil, see below.
Eccentricity and axial wobble of mounting surfaces on associated equipment, such
as shaft and rope drums, must not exceed 0.15 mm (0.006 in) for the inner and
outer anges.

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Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Series 44 and 64
Motor
Shaft
adapter Rope drum
24 hole Ø22 mm (0.87 in) 24 hole Ø18 mm (0.71 in)
M20 alt.
3/4 UNC
M16 alt.
5/8 UNC
Fig. 9:
Tightening torque for assembly bolts, min. strength class 12.9* (ISO 898/1) :
Torque M16 = 340 Nm (250 lbf·ft)
Torque 5/8 UNC = 320 Nm (236 lbf·ft)
Torque M20 = 700 Nm (516 lbf·ft)
Torque 3/4 UNC = 600 Nm (443 lbf·ft)
* Class 12.9 is needed for max. allowed load on the motor. For less load, other bolts
can be used.
Series 84
M24
M20
Motor
Shaft
adapter
Rope drum
24 hole Ø28 mm (1.10 in) 24 hole Ø22 mm (0.87 in)
Fig. 10:
Tightening torque for assembly bolts, min. strength class 12.9* (ISO 898/1) :
Torque M20 = 700 Nm (516 lbf·ft)
Torque M24 = 1200 Nm (885 lbf·ft)
* Class 12.9 is needed for max. allowed load on the motor. For less load, other bolts
can be used.

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3.1.1 Motor – valves
Mounting of valve V 46-O on 44 – and 64-series motors
NOTICE
Before mounting of the valve, check that the motor is mounted into the bracket with
“D2” connection on the motor mounting surface facing downwards, see gure 12.
1
2
Motor
Cover
Valve
Fig. 11:
1: 4 pcs 5/8 UNC x 165 mm (6.5 in). Strength class 8.8 (ISO 898/1). Tightening
torque 200 Nm (150 lbf·ft)
2: 2 st. 5/8 UNC x 178 mm (7 in). Strength class 8.8 (ISO 898/1). Tightening torque
200 Nm (150 lbf·ft)
A
A
D2
Motor mounting surface 2-speed plug
Fig. 12:
• Remove the cover on the motor mounting surface.
• Remove all plugs on the motor mounting surface.
• Mount the plug BSTP 3/4” (included in the mounting set) in the bottom of the hole
for port “A” see gure 12.
• Place the O-rings in the proper position on the valve mounting surface. Use grease
to keep the O-rings xed.
• Mount the valve against the motor with the ports in the corresponding position.

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Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Mounting of valve V 46-C on 44- and 64-series motors
NOTICE
Before mounting of the valve, check that the motor is mounted into the bracket with
“D2” connection on the motor mounting surface facing upwards, see gure 14.
• Remove the cover on the motor mounting surface.
• Remove all plugs on the motor mounting surface.
• Mount the plug BSTP 3/4” (included in the mounting set) in the bottom of the hole
for port “A”, see gure 14.
• Place the O-rings in the proper position on the valve mounting surface. Use grease
to keep the O-rings xed.
• Mount the valve against the motor with the ports in corresponding position.
Motor Cover
Valve
Fig. 13:
2-speed plug
Motor mounting surface
Fig. 14:
1.1.3 Motor – torque arm
Mounting of torque arm on series 44 and 64
• Remove the cover on the motor mounting surface
• Install the torque arm on cylinder block as shown in the gure.
In the installation, connection “D2” on the motor should be upwards.

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For TAC 1000-K, lubricate the hub and keys of the cylinder block with oil. Place the
keys in their correct position and knock them in.
Notice! Do not knock the keys in so far that they damage the wear ring on the
cylinder block.
A deformed wear ring can cause oil leakage.
• Install the cover.
CAUTION
Do not weld, drill, grind or carry out similar work on the torque arm without
Hägglunds approval.
Shaft on driven machine
Shaft coupling
Motor
Torque arm, TAC 1000-K
Fig. 15:
1. Wear ring
2. Key
3. Cylinder block
4. Cover
5. Torque arm
Fig. 16: Torque arm TAC 1000-K

20/68 Installation
Bosch Rexroth Mellansel AB, Intallation and maintenance manual, Hägglunds VI, RE 15310-WA/10.2015
Mounting of torque arm on series 84
• Mount the torque arm on the motor mounting ange. Connection “D1” should be
upwards.
• Lubricate the screws with oil and tighten them to the prescribed tightening torque:
M24 – 1200 Nm (885 lbf·ft)
1” UNC – 1400 Nm (1033 lbf·ft)
Notice! With regard to the screws see the marking on motor rear cover.
One slot = Metric thread
Two slot = UNC thread
12
3
1. Torque arm
2. Motor mounting ange
3. 24 pcs MC6S 24 x 65 screws,
strength class 12.9 (ISO 898/1),
or 24 pcs UC6S 1” UNC x 64
(2 1/2”) screws, strength class
12.9 (ISO 898/1)
Fig. 17: Torque arm TAC 1250-B
Mounting of attachments
The attachments for TAC 1000-K and TAC 1250-B must be welded to the surround as
shown in gure 18 and 19. For the sti attachment it is only necessary for one of the
assembly surfaces to be welded.
Quality requirements:
Welding class K1 according to HS 2020 2015, EN 25 817:1992.
Welding class Sv2 according to Building Welding Standard StBk-N2.
Welding class AK according to DIN 8562. ASME Boiler Code Section VIII.
BS 1500:1 and BS 1515:1.
NOTICE
It is strongly recommended to use pivoted attachment