SAF-HOLLAND SK-V 20 Installation guide

Aufbau - Bedienung - Wartung
Mounting - Operation - Maintenance
Verschiebeeinrichtung
Slider
SK-V 20
Edition 07/2014

21
Technical Data
The Slider SK-V 20 is designed for use with fifth wheels, designed in accordance with
Directive 94/20 EG and DIN 74081
The Slider is suitable for fifth wheels which are suitable for attachment to
automatically-steered semitrailers. The steering wedges on semitrailers must
correspond to the dimensions in accordance with EC 94/20, Appendix V, Section 7.9.1.
Maximum imposed load: 18 t
Maximum D-Value: 135 KN
EG-approval number: e11-00-5482
Basic Version
Without fifth wheel
Installation height 35 mm
Weight 110 kg
With fifth wheel
Installation 185 mm 220 mm 260 mm 285 mm
Weight 222 kg 225 kg 229 kg 233 kg

22
Table of contents
Mounting instructions 23
Operation 26
Locking and unlocking the slider (manually operated) 26
Locking and unlocking the slider (pneumatically operated) 28
Manual conversion – pneumatically operated 29
Disassembling the manual locking mechanism 30
Assembling the pneumatically operated locking mechanism 31
Connecting to the vehicle pneumatics 34
Maintenance 35
Before initial commissioning 35
Maintenance intervals 36
Repairs 38
Locking wedges 38
Carriage, complete / Locking wedge guides 39

23
General information
Failure to follow these instructions can lead to dangerous operating conditions.
Before mounting the slider and putting it into service, please read and follow the
instructions.
xModifications of any kind preclude guarantee claims and invalidate product type
approval.
xThe mounting of fifth wheel, mounting plate, slider and kingpin, as well as repair
work, should only be performed by qualified specialists in workshops suited for
this.
xIf the service and repair work specified in the manual is not adhered to, SAF-
Mounting instructions
xFor the mounting of the slider, the mounting instructions of the respective
commercial vehicle manufacturer and those of SAF-HOLLAND are to be
observed.
xThe slider is mounted directly (without an intermediate plate) on the vehicle
auxiliary frame. For the mounting, we recommend the corresponding mounting
kits from SAF-HOLLAND.
xThe slider must be adjusted for the coupling point recommended by the vehicle
manufacturer and taking into account the desired sliding distance.
xThe design of the slider is dependent upon:
- vehicle auxiliary frame width
- number of axles (4x2, 6x2, 6x4 etc.)
xIf a coupling point is mounted on the slider, the applicable mounting instructions
must be observed.
xThe specifications of the automobile manufacturer regarding tightening torque are
to be strictly observed.
HOLLAND take no responsibility for the function and reliability components.

24
Pos. 1 SK-V20, complete
Pos. 2 hexagon bolt
Pos. 3 washer
Pos. 4 hexagon nut
Pos. 5 SK-V20, complete
Pos. 6 hexagon collar nut
xThe slider must be mounted with the following minimum number of fasteners and
torques:
16 x M14 - 10.9 Ma min. = 170 Nm
12 x M16 - 10.9 Ma min. = 250 Nm
12 x M18 – 10.9 Ma min. = 350 Nm
12 x M20 – 8.8 Ma min. = 340 Nm
xNote In the exploded view above, only one possible assembly version is shown.
Depending on vehicle type, different numbers, sizes and sequences of
mounting elements are used.
xNote For the mounting of the SK-V20, it is strongly recommended to use only
original mounting kits from SAF-HOLLAND.
xNote After the first 1,000 km, all screws must be checked for correct torque and
tightened if necessary.
5
6
2
3
1
3
4
Pos. 1 SK-V20, complete
Pos. 2 hexagon bolt
Pos. 3 washer
Pos. 4 hexagon nut
Pos. 5 SK-V20, complete
Pos. 6 hexagon collar nut
5
6
2
3
1
3
4

25
xWhen mounting the slider, the national registration regulations are to be
observed.
xGenerally, the coat thickness of the paint in the clamping zone of the screw must
conform to legal standards in order to avoid impairing the flux. In the Federal
Republic of Germany, the TÜV regulations regarding screws and their safety in
motor vehicle manufacture are to be observed.
xThe coupling plate of the slider carriage must be freely movable and may not
contact any part of the slider or the vehicle frame during driving or sliding
operation.
xThe imposed load and the D-value are the criteria for determining the load
capacity of fifth wheels and mounting plates (slider). In the case of several type
plates, the lowest specification for imposed load and D-value is decisive.
xThe D-value is calculated according to DIN 74081 using the following equation:
Example:
Legend:
mA= permissible total weight of the tractor in tonnes mA= 20 tonnes
mK= permissible total weight of the semi-trailer in tonnes mK= 30 tonnes
A = permissible imposed load in tonnes A = 15 tonnes
g = acceleration of gravity with 9.81 m/sec.²
The permissible load capacities for SAF-HOLLAND fifth wheels and mounting
plates (sliders) are specified in the sales catalogue of SAF-HOLLAND.
transport conditions common to central Europe. Please consult us if operating
conditions differ.
D=9.81 0.6 20 30
20 +30 -15 100.9 kN

kN
A
-
m
+
m
mm0.6
g
=
D
AK
AK
in


These specifications are applicable for operation on sealed roads and

26
Operation
xIt is recommended to perform the sliding with an unloaded trailer.
Note
before unlocking and locking, the vehicle should always be secured against
rolling (i.e. by means of a handbrake or wedge placed underneath).
Unlocking the slider (manually operated)
3
B
2
13 Unhook safety clip
4 Push hand lever forward
in direction of travel until limit stop is
reached
(slot B is free)
Direction of travel
3 Pull hand lever against force of
spring towards vehicle exterior side
View from below:
Locking wedges are fully
retracted
4 Slide slot A forward in the direction
of travel into the lever guide
Release handbrake
(remove steering wedge)
5 Start sliding procedure
5
4
A

27
Locking the slider (manually operated)
7
6
6 Press hand lever backwards in the
direction of travel
7 The force of the spring pulls the
lever toward the inside
B
8
8 Slot B is pulled by the spring
into the lever guide
99 Hook the safety clip
Warning
If not properly locked, the safety clip cannot be hooked
Locking wedge Properly locked?
1 Release handbrake.
2 Put into first gear and roll slowly
forward approx. 2 m.
The locking wedges slide into the
next available pair of teeth
(with a short jerk).
3 Engage handbrake!
4 Hook safety clip!

28
Unlocking and locking the slider (pneumatically operated)
xThe slider is unlocked and locked from the driver cab by means of an operating
valve.
Note: Inspecting the lock
After each sliding procedure, a visual check must be performed to ensure
correct locking.
Locking complete (correct)
The indicator pointer (Z) must c
c
ompletely cover the indicator field (F)!
1 / 51 / 5
1 Press button in driver cab and
hold
depressed.
2 Release handbrake from tractor unit
3 Move the vehicle.
4 Pull the handbrake into the desired
position.
5 Release the button.
Tension spring not shown
FZF
Z
Warning
Pressing the button to release the sliding function (in the driver cab) may only
be done if the vehicle is at a standstill! During the sliding procedure, the semi-
trailer must be secured with wedges placed underneath it!

29
Locking incomplete
If the locking is incomplete, the indicator pointer (Z) does not cover the
indicator field (F)!
If the coverage is not complete:
1 Release handbrake.
2 Put into first gear and roll slowly f
f
orward approx. 2 m.
The locking wedges slip into the next available pair of teeth (with a brief jerk).
3 Engage handbrake.
4 Check for proper locking.
Manual conversion – pneumatically operated
xThe conversion should only be performed by personnel specially trained for this.
xNo disassembly of the slider from the vehicle auxiliary frame is required for the
conversion.
xThe following tools are required for the conversion:
- Ratchet wrench with short extension (optionally, long extension)
- Screw mounting kit, size 19
- Box wrench, size 19, hexagon socket wrench, sizes 12 and 6
- Open-jaw wrench, sizes 14 and 11, spring hook, hammer, round chisel
Tension spring not shown
FZZF

30
Disassembling the manual locking mechanism
xBefore beginning, fix locking wedges and carriage so they cannot slide (risk of
crushing).
1 Release and remove screw
2 Unhook spring and remove with bolt
3 Dismantle lever support
4 Unhook springs (left and right) and
remove
6 Release and remove screws
6 Remove mechanism
7 Remove sleeves (2x)
Align the locking wedges so that the 3
drilled holes each are centred in
relation to the guide (punching)

31
Assembling the pneumatically operated locking mechanism
Assembly of lug angle on housing lid of P-cylinder
Limit stop after “Open”
Mounting width on vehicles
780 – 900 mm
1 Position spacers (left and right),
Position for models 780 – 900 mm
Mounting width on vehicles
900+ mm Arrow and “open”, engraved on
spacer, points on both sides in the
direction of the slider centre (slider
“opens”)
1 Position spacers (left and right),
Position for models 900+ mm
1. Position lug angle (ensure proper
alignment with add-on filter)
2. Attach screw M8x16 – 8.8
with washer A 8.4
Ma = 20 Nm
Add-on filter (preassembled on
cylinder in assembly kit)

32
xFor the attaching of the levers, the SAF-HOLLAND original screws included in the
mounting kit are exclusively to be used.
xThe screws should only be reused once (1x fully unscrewed and 1x fully screwed
back in). Thereafter, these screws should be replaced with new ones.
2 Position levers (left and right),
Position for models 780 – 900 mm
3 Screw in screw (2x per side),
Ma = 170 Nm ± 10 Nm
Mounting width on vehicles
780 – 900 mm
Mounting width on vehicles
900+ mm
2 Models 780 – 900 mm:
Drilled holes 1 and 2
2 Models 900+ mm:
Drilled holes 2 and 3
1 2 3
2 Position levers (left and right),
Position for models 900+ mm
3 Screw in screw (2x per side),
Ma = 170 Nm

33
4 Mount tension springs (left and right) 5 Mount cylinder (see detailed description)
5.4 Hexagon bolt
M12 x 35 – 8.8
5.2 Washer – A13 *
5.4 Hexagon nut M12 – 8, self-
locking
*Washers optionally 1x or 2x according to
tolerance of the enclosed spare parts; align the
cylinder vertically so that it is parallel to the
carriage
5.1 Release contact spring (not shown,
preassembled on cylinder
in assembly kit) and connect it with
forked head of piston rod

34
Connecting to the vehicle pneumatics
xThe operating valve must be installed in the driver cab so that under any operating
condition the possibility of unintended operation or damage can be excluded. The
advisory sticker must be attached in a clearly visible position next to the valve.
xAttach the original SAF-HOLLAND advisory sticker in a clearly visible position next
to the operating valve. Accidental covering of the sticker is to be avoided.
xAll pneumatic parts may only be installed and used as intended for their described
functions.
xDuring driving and sliding operation, it must be ensured that collisions with other
vehicle parts cannot occur.
xThe cylinder is designed for driving in an ambient temperature of -40 °C. For
technically flawless functioning of all pneumatic parts, an adequately de-
humidified system air supply adapted for the ambient temperature must be
available.
xFor the mounting of the cylinder, only original SAF-HOLLAND screws with micro-
encapsulation may be used.
Operating valve (in driver cab,
mounting points dependent upon
vehicle t
yp
e)
Branch of vehicle pneumatics
(accessories) with T-plug connector
Plug connections (2x) for connecting
pneumatic line to operating valve
Plug connections (1x) for connecting
pneumatic line to cylinder
Spiral hose for mounting under the
carriage, prevents kinking of the
pneumatic line during sliding operation
Advisory sticker for mounting in
driver cab (as close to operating
valve as possible)

35
Maintenance
Note
xThe slider is a safety feature. The observance and careful performance of regular
maintenance intervals is required to ensure technically flawless functioning over
the entire service life.
xBefore beginning maintenance work, secure the towing vehicle (handbrake,
wedge placed underneath).
Before initial commissioning
Lubrication
xBefore initial commissioning, the positions (D) through (F) should be treated with
an oil spray conforming to ISO 22 (not available through SAF-HOLLAND). The use of
grease of unspecified quality is not recommended for reasons of uptake and
binding with street contaminants:
Inspection of the mountings
xThe following mountings are to be inspected: (A) Screw connections between
slider and frame (for Ma see page 4), (B) screws in locking wedges (Ma = 170 Nm)
and (C) screws for mounting the SK-S 36.20 on the slider carriage (Ma = 270 Nm).
(D) Carriage – tread profile of the
notched stri
p
(left and ri
g
ht)
(E) Locking wedges (left and right)
(F) Lock mechanism
(A) (B)
(C) Not shown

36
Maintenance intervals
Every 10,000 km
(1) Uncouple the trailer and secure it (wedge placed underneath)
(2) Clean fifth wheel and slider (use only commercially available cleaning agents
specified for the unit)
(3) Visual check for damage (especially connecting and moving parts, weld seams)
(4) Check carriage guide measurements (see Fig. 1), a feeler gauge can be used for
this
(5) Apply cleaning oil ISO 22 to parts (A) through (F) (see page 33)
Every 50,000 km
(1) Uncouple the trailer and secure it (wedge placed underneath)
(2) Visual check for damage (especially connecting and moving parts, weld seams)
(3) Check carriage guide measurements (see Fig. 1)
(4) Check for ease of movement during opening and closing (see manual chapter
“Operation”)
(5) Check tension springs for proper action of blocking pieces (closing)
(6) Check safety clip with chain for damage, tightness of fit
(7) Check tightening torque for (A) through (C), see page 33
(8) Check sliding play in the vehicle longitudinal direction between carriage and
notched strips (for description see page 34, Fig. 2 through Fig. 5)
(9) Apply cleaning oil ISO 22 to parts (A) through (F) (see page 33)
Fig. 1: Wear limits of the carriage guide (left and right)
max. 4

37
max. 5 mm
If longitudinal play is less than 5 mm,
function OK.
Fig. 2: Max. permitted longitudinal play
Fig. 3: Degree of wear on the teeth openings
Fig. 4: Degree of wear on the blocking
p
ieces
Fig. 5: Degree of wear on the locking
wedge guides
If longitudinal play is equal to or greater
than 5 mm, the measurements of Fig. 3 to
Fig. 5 must be checked, and the respective
parts replaced if the limits are exceeded.
If the width is greater than 60.85 mm, the
carriage must be replaced in its entirety.
max. 60.85

38
Repairs
(A) locking wedges
xThe locking wedges can be exchanged in succession without disassembling the
slider from the vehicle and without having to remove the retaining springs.
Proceed in the same manner with the other side. The assembly is done by reversing
the sequence of steps.
xThe replacement of the locking wedges can likewise be done as described in the
chapter “Manual conversion – pneumatically operated” starting on page 9. The
mounting of the disassembled parts is done by reversing the sequence of steps.
Note
Before starting work, secure the levers (left
and right) so that they cannot twist (high spring
tension, risk of injury)
1 Bend safety flange 90°
2 Release M14 screw and remove it with
safet
y
flan
g
e
Tension spring not shown
3Push out locking wedges toward middle
axle of vehicle (caution: risk of crushing
injury)
4 Insert new locking wedges.

39
(B) Carriage, complete / guides for locking wedge
xIf excessive wear occurs on the guides of the locking wedge, the slider must be
removed from the vehicle and the carriage replaced.
7 Separate slider from towing vehicle and
attach securely to a secure support
frame
8 Release screws (4x, M16) and remove
with washer
9 Remove front limit stop
10 Push carriage forward in direction of travel
11 Fix carriage to a secure support frame
12 Component replacement as described in
Chap. “Manual conversion – pneumatically
operated“ (from page 9). The assembly is
performed by reversing the sequence of
steps