ZF-DUOPLAN 2K2100 User manual

OPERATING INSTRUCTIONS
Two-speed Gearbox
023636
019928
019927
Pulley Drive
2K2100 with STW
06.2009 Edition
4161 758 104a

2K2100 with STW
2
Subject to alterations in design
Copyright by ZF
Reproduction, in whole or in part, is only allowed with our written approval and authorization.
Printed in Germany
06.2009 Edition
4161 758 104a

Operating Instructions
2K2100 with STW Contents
3
1Preface.....................................................................................................................................................5
1.1 Safety instructions .........................................................................................................................5
1.2 ZF instructions ...............................................................................................................................5
1.3 Service products.............................................................................................................................6
2Application and design ..........................................................................................................................7
2.1 Application ....................................................................................................................................7
2.2 Features..........................................................................................................................................7
2.3 Design ............................................................................................................................................8
2.4 Technical data................................................................................................................................9
2.5 Installation positions, 2K2100 .....................................................................................................10
2.5.1 Installation positions, 2K2100 with STW (spur gear stage) ........................................................11
3Initial installation.................................................................................................................................12
3.1 Axial runout, radial runout and length tolerances – drive motor.................................................12
3.2 Balancing .....................................................................................................................................13
3.2.1 Semi-key balancing......................................................................................................................13
3.2.2 Full-key balancing .......................................................................................................................13
3.3 Mounting of 2K2100 without STW (spur gear stage) on motor/gearbox....................................14
3.4 Adaptation, motor/gearbox ..........................................................................................................15
3.4.1 Open design .................................................................................................................................15
3.4.2 Closed design, on request (with shaft seal)..................................................................................16
3.4.3 Open design with adapter ring for 2K2100, on request ...............................................................17
3.5 Mounting the gearbox..................................................................................................................18
3.6 Output as STW (spur gear stage) gearbox ...................................................................................19
3.6.1 Option: version with belt drive ....................................................................................................20
3.6.2 Option: version with coaxial output, only on request ..................................................................21
3.7 Electrical connection, gearchange ...............................................................................................21
3.7.1 Shift unit ......................................................................................................................................21
3.7.2 Checking, adjusting and exchanging the shift unit on the 2K2100 gearbox................................22
3.7.3 The cover (item 082) is removed from the shift unit for checking all functions .........................23
3.7.4 Checking the slip clutch for the correct friction torque ...............................................................23
3.7.5 Checking the limit switches.........................................................................................................23
3.7.6 Shift logic for 1st and 2nd gear....................................................................................................24
3.7.7 Shift logic for centre position ......................................................................................................25
3.8 Lubrication...................................................................................................................................26
3.8.1 Recirculating lubrication..............................................................................................................26
3.8.2 Ports and connections for lubrication ..........................................................................................27

Operating Instructions
Contents 2K2100 with STW
4
4Taking into operation...........................................................................................................................29
4.1 Initial inspection...........................................................................................................................29
5Maintenance..........................................................................................................................................29
5.1 Oil change ....................................................................................................................................29
6Repair....................................................................................................................................................30
6.1 Gearbox fault checklist ................................................................................................................30
6.2 Gearbox removal..........................................................................................................................31
6.3 Hub...............................................................................................................................................31
7Frequently Asked Questions (FAQs)..................................................................................................32

Operating Instructions
2K2100 with STW Preface
1Preface 1.1 Safety instructions
•All persons repairing ZF units are responsible
for their own work safety.
This documentation is intended for specialists who
have experience to carry out maintenance and
repair work. •Every applicable safety regulation and legal
requirement must be complied with in order to
prevent injury to personnel and/or damage to
the product during the course of maintenance
and repair work.
The ZF product is documented in accordance with
the design status as of the issue date.
The following safety notices are used in these
operating instructions: •Repair staff should familiarize themselves with
these regulations before commencing work.
•Correct and proper repair of these ZF products
can only be assured by appropriately trained
specialists.
NOTE
Used to highlight special sequences, methods,
information, use of equipment etc.
•The organization in charge of repairs is
responsible for ensuring that such training is
given.
CAUTION
Used when incorrect and improper operating
procedures can cause damage to the product.
•Read these operating instructions carefully
before commencing any testing or repair work.
DANGER!
!
Used when due lack of care and attention
can cause injury to personnel or put lives
at risk.
CAUTION
Pictures, drawings and components do not
always represent the original object but are
used to illustrate working procedures.
The illustrations, diagrams and parts are not
drawn to scale and no assumptions should be
made regarding size and weight (including
within a single illustration or drawing).
ENVIRONMENTAL HAZARDS!
!
Lubricants and cleaning products must
not be poured onto the ground, into
groundwater or down the drain. Work must be performed as described in the
text.
• Obtain and comply with the safety
regulations relevant to these products
issued by your local environmental
authority.
Following the completion of any repair work and
testing, the specialists must satisfy themselves that
the product will function perfectly again.
• Collect used oil in a suitably large
container. 1.2 ZF instructions
• Dispose of used oil, clogged filters,
lubricants and cleaning products in
accordance with local environmental
protection regulations.
•Remove any traces of old seals or gaskets from
mating faces. Use an oil stone to carefully
remove any burrs or similar irregularities.
• Always follow the instructions issued
by the manufacturer when handling
lubricants and cleaning products.
•Carefully cover or shield open gearboxes to
prevent the ingress of foreign matter.
5

Operating Instructions
Preface 2K2100 with STW
6
1.3 Service products
Product Name/specification Quantity
(approx)
[dm3]
Use Remarks
Grease Shell Avania WR2
Fuchs Renolit CXEP2
Esso Beacon EP2
General-purpose
Gearbox oil
HLP 46 to ISO VG 46
Gearbox oil for
recirculating
lubrication
Can also be used for
recirculating lubrication
with heat exchanger
Gearbox oil
HLP 32 to ISO VG 32
Gearbox oil for
recirculating
lubrication with heat
exchanger
Other gearbox oil specifications for lubrication on
request.

Operating Instructions
2K2100 with STW Application and design
2Application and design
7
2.1 Application
The ZF-DUOPLAN two-speed gearbox is mainly
used in machine tool drives.
By way of example, the gearbox can be used in
turning machines (horizontal B5, B5 ± 20°
swiveled) or machining centers (vertical V1)
thanks to its variable installation position. The
gearbox is also suitable for use in many systems
in which torque increase or speed reduction is
required.
The gearboxes have coaxial output and are
suitable for the high speeds generated in machine
tool construction. Use with an STW (spur gear
stage) gearbox gives rise to an axle offset, with
the output spur gear being fixed to the machine
spindle with clamping elements. In this case the
machine spindle can be designed as a hollow
shaft.
The 2K2100 variant with input flange ensures a
short installation length thanks to the parallel
arrangement of the gearbox and motor.
2.2 Features
•Two-speed gearboxes for AC and DC main
spindle drives in machine tools
•Compact thanks to planetary design
•Directly flange-mountable to all AC, DC and
standard motors
•Can also be used with pulley drive to save
space in parallel configuration
•High running smoothness and low-noise
operation thanks to helical gearing
•Low torsional backlash
•Easy to install
•High efficiency
•Motor gear change, with neutral position, idle
•Combined axial and radial force sensing as an
option
2K2100 with input flange
019927
2K2100
019928
2K2100 with input flange and STW gearbox
023636

Operating Instructions
Application and design 2K2100 with STW
2.3 Design
The gearbox primarily comprises the following
assemblies:
Connecting parts:
•Drive hub with threaded pin (E)
•Adapter plate with radial shaft seal and hub
bearings, as necessary, not shown here
8
Option: pulley drive:
•Bearing housing (A)
•Input bearings (B)
•Input shaft (C)
•Radial shaft seal (D)
•Drive hub with threaded pin (E)
•Grooved nut with retainer (F)
•Fitted key (G)
Housing:
•Gearbox housing (5)
Input/planetary drive:
•Sun gear (6)
•Ring gear (7)
•Ring gear bearings (8)
•Planetary gear carrier (K)
•Axial bearings with cup springs (L)
Output, on request
Option: shaft/flange:
•Bearing housing (9)
•Output bearings (10, 11)
•Output shaft (12) (output flange)
•Radial shaft seal (13)
Option: STW (spur gear stage)
Housing (P)
Input spur gear with shaft and bearings (Q)
Intermediate gear with bearings (R)
Oil lines (S), lubrication for 2K2100
Output spur gear with labyrinth seal (T)
Cover (U)
•Tensioning ring as necessary (V)
•Centering ring (W)
Shift mechanism:
•Sliding sleeve (16)
•Shift fork (17)
•Brake disc (18)
Shift unit:
•Motor shift mechanism (19)
•Selector shaft (20)
V
D
CFE K5876 L
P
Q
S
R
BGA 20 19 17 16 18
UT
023637
9
10
11
12
13
023719

Operating Instructions
2K2100 with STW Application and design
2.4 Technical data
Type 2K2100
version
without
output
2K2100
version
with STW
(i=1.396)
Nominal power max. 120 kW max. 120 kW
Nominal speed 500 rpm 500 rpm
Max. speed in
direct drive i=1 3500 rpm 3500 rpm
Max. speed in
ratio i≠1 3500 rpm 3500 rpm
9
NOTE
When using engine brakes/counterflow to brake
the spindles (e.g. emergency stop), ensure that the
moments of inertia do not exceed the admissible
output torques. Braking times must be adapted
accordingly.
Standard fixing dimensions (in mm)
in accordance with EN 50347
Two-speed
gearbox
2K2100
with
1PH7 +
224
Motor size FF 500 FF 500 FF 500
h 225
d 75 m6 80 m6 90 m6
l 140 ±0.2 170 ±0.2 170 ±0.2
b 450 h6
e2500 ±0.5
a1550
s28x18.5 8x18.5 8x18.5
Type 2K2100
version
without output
2K2100
version
with STW
(i=1.396)
Nominal input
torque (S1)
max.
2100 Nm
max.
2100 Nm
Max. output
torque (S1) for
i = 1.00
i = 4.00
2100 Nm
8400 Nm
2932 Nm
11800 Nm
Weight approx. 130 kg approx.
400 kg
Model plate (standard)
(affixed to gearbox housing)
023638
S2
a1e2
db
h
1
023639

Operating Instructions
Application and design 2K2100 with STW
2.5 Installation positions, 2K2100
Horizontal B5
Vertical V1
Vertical V3
Adapter plate or
motor with shaft seal
CAUTION
The breather outlet (1) must always be at the
top, regardless of the installation position.
1
023640
1
023641
1
2
023642
10

Operating Instructions
2K2100 with STW Application and design
2.5.1 Installation positions, 2K2100 with
STW (spur gear stage)
Horizontal B5
PORT FOR
LUBE OIL
SERVOMOTOR
BREATHER
VERSION A
VERSION B
FOR BOLTS M16
SPINDLE
GEARBOX
SPECIAL VERSION
(OIL OUTLET
POSSIBLE ON
LEFT OR,
ALTERNATIVE-
LY; RIGHT...)
OIL OUTLET
HOLLOW
SCREW
PORT FOR
LUBE OIL
GEARBOX
OIL
OUTLET OIL
OUTLET
DEEP
MODEL PLATE
VERSION A
023643
Horizontal B5
(swiveled through ±20°)
Other installation positions
on request
2
0
°
M
A
X
2
0
°
M
A
X
023644
023645
11

Operating Instructions
Initial installation 2K2100 with STW
12
3Initial installation
3.1 Axial runout, radial runout and length
tolerances – drive motor
In order to guarantee fault-free operation, the
motor must not exceed the specified tolerances.
Axial runout, radial runout and length tolerances –
electric motor mounting flange:
Tolerance
Gearbox
type ABCL=140
L=170
2K2100 0.030 0.063 0.063 ±0.200
Tolerances A, B, C to DIN 42955R
Please note that the tolerance of the shaft length "L" is
restricted in relation to the DIN standard
CAUTION
The special tolerance for shaft length "L" must
be maintained in order to guarantee fault-free
gearbox operation. Undersize shafts must be
compensated for by using shims when
mounting to the motor. Oversize shafts must be
machined to the correct length.
Take into account the motor shaft elongation
caused by heating in motors with fixed bearing on
the B-side (opposite the motor output shaft).
023646

Operating Instructions
2K2100 with STW Initial installation
3.2 Balancing
13
The hubs (2) come with a keyway (1) for
transmitting power from the motor shaft (3) as
standard.
There are two balancing types for the motor and
gearbox, irrespective of the balancing quality:
semi-key and full-key.
It must be ensured that the hub is balanced in the
same way as the motor.
This is why it is very important to indicate the
motor data, dimensions and balancing type when
ordering.
Motor output shafts with standard fitted key in
accordance with EN 50347: 2001
Gearbox
type
Shaft
diameter,
length
Fitted
key
Fitted key
length
2K2100 Ø 75x140 mm
Ø 80x170 mm
Ø 90x170 mm
A20x12
A22x14
A25x14
125 mm
140 mm
140 mm
NOTE
In the case of motor shafts with open ends of the
keyway, the parallel key is to be glued into the
groove in order to avoid axial migration of the
parallel key and/or the hub.
023647
1
2
3
Semi-key balancing Full-key balancing
3.2.1 Semi-key balancing
In semi-key balancing, the keyway is filled out
with a balance compensator corresponding to
approximately half a key, shape B by default. This
is based on the original key, shape, length and
position used by the motor manufacturer and is
defined as a counterweight. In semi-key balancing
– in contrast to full-key balancing – the joint
passes through a shared component. This means
imbalance can arise after assembly due to
tolerance factors.
As a result, it is recommended that rebalancing
should be performed after the joined parts have
been assembled.
3.2.2 Full-key balancing
In full-key balancing, the motor shaft is balanced
with a full key whereas the hub is not. The key,
shape, length and position are not important in
this case.

Operating Instructions
Initial installation 2K2100 with STW
3.3 Mounting of 2K2100 without STW (spur
gear stage) on motor/gearbox
If the 2K2100 without output (without spur gear
stage) is supplied, mount the gearbox as follows.
Clean the flange faces on the gearbox housing and
the machine, check for unevenness and, if
necessary, skim with an oil stone.
First check the following dimensions (see
diagram):
A: 39 ± 0.1 mm is required on the input shaft in
order to allow bracing of the planetary gear carrier
with the machine bearings or spacer ring (1).
B: 41 – 0.5 mm; length of the profile in the
planetary gear carrier
Installation:
14
Slide the planetary gear carrier (profile
N90x2x30x44x9H) with ring gear onto the shaft
with the profile W90x2x30x44x9k. Bolt the
planetary gear carrier using the pan head screw
"D" with hexagon socket head (M24x2x60, with
bore).
Tightening torque: 420 Nm.
023648
Insert the O-ring "C" into the groove, using
standard grease to affix it if necessary. First
position the gearbox housing with the pan head
screws (13xM16x*) "F" and then tighten the
screws diagonally/alternately in several stages
until the final torque (195 Nm) is reached.
Undo the brake disc bolts. The shift mechanism
must be in 1st gear (4:1). Centering the brake disc
relative to the sliding sleeve can influence the
gear change.
NOTE:
The shift mechanism must be in 1st gear (position
S; 4:1). As a result, the sliding sleeve is also
guided. The gearing should be greased to make
installation easier.
A
39.000
41.000
C
B
I
D
F
H
R
P
M
S
TG
N1
023649
* (not part of ZF scope of supply)

Operating Instructions
2K2100 with STW Initial installation
3.4 Adaptation, motor/gearbox
The motors must have a flange-mounting option
for mounting the gearboxes.
The gearbox housings are fitted to the motor by
means of the centering adapter (version without
output). This is standard.
NOTE:
Option: in the case of the version with output
shaft, the 2K2100 gearbox housing is adapted to
the machine by means of centering on the bearing
housing.
Different gearbox variants are used depending on
the motor version. Gearbox mounting therefore
differs accordingly.
Reference dimensions for hub position
Gearbox type Dimension C in mm
108.8 + 0.2
2K2100
15
Spacer discs "D" are supplied with shims of
varying thickness. These enable balancing of the
motor shaft length tolerances and, therefore,
compliance with reference dimension "C".
3.4.1 Open design
The open version is the gearbox without adapter
plate but with seal on the motor output shaft (2) to
prevent gearbox oil ingress.
The drive hub (1) is delivered loose with the
gearbox. Clean the fitting surfaces of the motor
(3) and drive hub. Check the motor shaft for axial
and radial runout as described in section 3. Also
lightly grease the motor shaft.
After cleaning the fitting surfaces, heat the drive
hub to approx 120 °C from the opening and slide
it onto the motor shaft until it reaches the stop.
Then check the reference dimension "C". If
undersize, use shims for balancing. If oversize,
shorten the motor shaft.
CAUTION
Risk of motor shaft damage if the hub is not
sufficiently heated.
The M10 set screw (9) is to be tightened with
34 Nm and must be secured against twisting, also
refer to section 3.5. The factory-set sliding sleeve
shift dimension can be checked as described in
section 3.5 or 3.7.3.
NOTE
If the gearbox does not have an output, the
gearbox must first be mounted onto the machine.
(section 3.3)
The same applies in the case of the gearbox
variant with additional pulley drive.
Dimension C
023650

Operating Instructions
Initial installation 2K2100 with STW
3.4.2 Closed design, on request (with shaft
seal)
This variant incorporates an adapter plate (5) with
shaft seal (7), which means that the gearbox forms
a compact, closed unit.
The adapter plate (5) and drive hub (1) are
separately delivered loose. Clean the fitting
surfaces of the motor (3) and drive hub. Check the
motor shaft (2) for axial and radial runout as
described in section 3.1. Also lightly grease the
motor shaft.
After cleaning the fitting surfaces, place the
adapter plate with radial shaft seal (7) onto the
motor housing. Heat the drive hub to approx
120 °C from the opening and slide it onto the
motor shaft until it reaches the stop.
Then check reference dimension "C" and change
using shims if necessary.
CAUTION
Risk of motor shaft damage if the hub is not
sufficiently heated.
Tighten the threaded pin (9) and secure it to
prevent it from turning, see section 3.5. The
factory-set sliding sleeve shift dimension can be
checked as described in section 3.5.
CAUTION
Grease the radial shaft seal and the drive hub
before installation. When installing, make sure
that the sealing lip and the radial shaft seal are
in the correct position.
NOTE
The radial shaft sealing ring must be removed on
the A-side when the closed design is used.
Dimension C
023651
16

Operating Instructions
2K2100 with STW Initial installation
3.4.3 Open design with adapter ring for
2K2100, on request
The adapter ring allows adaptation to different
connection dimensions. A seal is required on the
motor output shaft.
The adapter ring (5) and drive hub (1) are
delivered loose. Clean the fitting surfaces of the
motor (3) and drive hub (1). Check the motor
shaft (2) for axial and radial runout as described in
section 3. Also lightly grease the motor shaft.
After cleaning the fitting surfaces, place the
adapter ring onto the motor housing. Then heat
the drive hub to approx 120 °C from the opening
and slide it onto the motor shaft (2) until it
reaches the stop.
Then check reference dimension "C" and change
using shims if necessary.
CAUTION
Risk of motor shaft damage if the hub is not
sufficiently heated.
Tighten the threaded pin (9) and secure it to
prevent it from turning, see section 3.5. The
factory-set sliding sleeve shift dimension "Y" can
be checked as described in section 3.5.
Dimension C
023652
17

Operating Instructions
Initial installation 2K2100 with STW
3.5 Mounting the gearbox
NOTE
When fitting the drive hub (1), screw in and
tighten the threaded pin (9) onto the fitted key.
Coat the threaded pin with liquid seal before
installing it.
Make sure that the O-ring (10) is in the correct
position during installation. The O-ring is
delivered loose with the gearbox and can be
coated with grease before being inserted into the
seal groove in the housing (6).
Check the position of the gearbox shift
mechanism. The sliding sleeve (see section 3.7.3)
must be in the "1" gear position ("low" gear ratio).
Take up the gearbox and place it onto the motor
flange. Carefully bring the sun gear/hub
connection together when doing this.
NOTE
The external spline of the sun gear must be guided
into the internal spline of the hub.
This can be made easier by turning to the left or
right at the gearbox output.
The gearbox housing, adapter ring (if applicable)
and motor are bolted together using four, six or
eight hexagon bolts (11).
Fill the gearbox with oil and connect up the
recirculating lubrication system and the power
supply. The breather outlet must always be at the
top, regardless of the installation position. Tighten
by max. 1 turn if necessary.
The gearbox is now ready for use.
10 11 6
A
B
023653
1st gear position
ABrake disc
BSliding sleeve
CAUTION
The gearboxes can be operated under the same
degrees of protection as those defined for AC
and DC motors.
When setting up, make sure that the motor cooling
air can flow in and out unhindered.
NOTE
Before taking the electric motor/gearbox assembly
into operation, check that the gearbox output can
be turned by hand.
In the case of drive units that are fixed on the
gearbox flange, support the motor on the B-side
so that it does not vibrate.
18

Operating Instructions
2K2100 with STW Initial installation
3.6 Output as STW (spur gear stage) gearbox
Clean the entire mounting surface, machine and gearbox (including the surfaces for reaction members) (6),
check for unevenness and, if necessary, skim with an oil stone.
Work on the 2K2100 with STW (spur gear stage) before mounting
Mount the oil line (1) (M16x1.5) on the spur gear stage housing because the lack of space will make
subsequent installation impossible or very difficult.
Position the eccentric adjuster (2; 3) right at the bottom.
The maximum eccentricity is indicated by a marking (0) on the eccentric bolt.
On the left side (3), place the marking at the 2-4 o'clock position.
On the right side (2), place the marking at the 3-5 o'clock position.
This setting ensures that the intermediate gear is at the "lowest" position.
PORT FOR
LUBE OIL
PORT FOR
LUBE OIL
HOLLOW
SCREW
023654
Mounting
Fix the gearbox (2K2100 + spur gear stage) on the motor frame with the centering ring (4) and attach using
the pan head screws (M16x80; 15 pcs.) (5). Tighten to 195 Nm in 4 or more stages (50, 100, 150, 195 Nm).
Lock the screws using Loctite.
Also mount the reaction member bolts (6) (not included in ZF scope of supply) (through-holes for M18
bolts), tighten them to the correct tightening torque and lock them.
19

Operating Instructions
Initial installation 2K2100 with STW
Clean the main spindle (page 19/7) in the area of
the helical gear (page 19/8) and remove any oil.
The bore (Ø 250 mm) in the helical gear must be
cleaned and free of oil. Apply a light film of oil to
the conical surfaces of the helical gear and the two
tensioning rings (do not use grease/oil containing
MoS), otherwise there will be a cold-welding
effect when bracing. Slide the helical gear onto
the main spindle with the two tensioning rings and
align on the intermediate gear of the spur gear
stage. Then tighten the helical gear clamping bolts
(M8x130; 8 pcs.) slightly (by hand, 5 - 10 Nm),
check the alignment of the helical gear and check
that the two tensioning rings are seated at right
angles. Evenly tighten the bolts to the specified
tightening torque in 4 stages, working cross-wise
(10, 20, 30, 35 Nm).
Check the tightening torque of the bolts in the
order of their arrangement. Installation of this
component is not complete until it is no longer
possible to tighten any of the bolts.
NOTE
After leaving the clamping bolts to "settle" for at
least 8 hours, retighten them again. Check the
tightening torque of the bolts in the order of their
arrangement.
Option:
Tensioning ring for additional drive (C-axis drive)
Carry out the preparation work and installation of
the tensioning ring in the same way as for the
helical gear.
If there is an additional tensioning ring for C-axis
drive, install the clamping elements in the same
way as the clamping elements for the helical gear
on the main spindle.
Eccentric adjustment of the intermediate gear
After installing the helical gear on the main
spindle, adjust the intermediate gear using the
eccentric bolt. The backlash between the helical
gear (8) and the intermediate gear or intermediate
gear and input helical gear must be between 0.05
and 0.1.
NOTE
Check the backlash using a feeler gauge.
Procedure:
First turn the right eccentric bolt (2) clockwise
until a slight resistance can be felt. Then turn the
left eccentric bolt (3) counter-clockwise until a
slight resistance can be felt.
Main spindle
Helical gear
Intermediate gear
Page 19/20
Input gear
023738
Keep repeating this procedure until no further
adjustment can be completed.
Then tighten the mounting bolts (page 19/9) on
the eccentric bolt to a torque of 23 Nm. Lock the
bolts using Loctite.
Also tighten the clamping bolts (page 19/10)
(M12x145; 2 pcs., tightening torque 79 Nm).
Fix and tighten the cover (page 19/11) with seal
(page 19/12) (M8x16; 16 pcs., tightening torque
23 Nm).
Mounting of the end cover (page 19/13).
Align with the labyrinth ring (not part of ZF scope
of supply) (page 19/14), tighten using the 6 pan
head screws (page 19/16) (M12x30) and then pin
with the supplied taper pins (page 19/15). In order
to allow easier determination of the cover position
with the pan head screws (M12x30; 6 pcs.,
tightening torque 23 Nm) during subsequent
removal.
3.6.1 Option: version with belt drive
The pulley must be centered on the outer diameter
of the input flange (page 30/17) (tolerance K6),
fastened with the bolts so that it is frictionally
engaged and secured. Comply with the specified
tightening torques.
20