WALTERSCHEID HOLHS Service manual

Cat. / Type
2 / 63
3 / 70
3 / 70 (DS)
3 / 90
3 / 105 (DS)
4 / 120
4 / 130 (DS)
Cat. / Type
4/3 / 120
Cat. / Type
2 / 63 KGK
3 / 70 KGK
Cat. / Type
3 / 90
ANBAU UND BEDIENUNGSANLEITUNG HOL
MOUNTING AND OPERATING INSTRUCTIONS HOL
INSTRUCTIONS DE MONTAGE ET D‘ULTILISATION HOL
HYDRAULISCHER OBERLENKER
HYDRAULIC TOP LINK
BARRE SUPÉRIEURE HYDRAULIQUE
309717
Stand 04.2021
DS = Sonderausstattung - Hydraulischer Oberlenker mit Dämpfung
DS = Extra equipment - hydraulic top link with shock absorber
DS = Barre d’attelage supérieure hydraulique avec amortissement intégré
www.walterscheid.com
GB
DE
FR
HOLHS
HOLKS
HOLKH

2
1
4
7
6
5
2*
3
4
37
1
6
5
2*
1
4
5
2* 3
1
9
7
8*
5
6
* nicht im Lieferumfang enthalten | not included in the scope of supply | équipment non fourni
A1
A2
A3
HOLHS (DS)
HOLKS (DS)
HOLKH (DS)

3
B1
B2
B4 B5
B3

4
C1 C2
C3

10
English
FOREWORD
When you receive the hydraulic top link, please
check whether any damage has occurred in transit,
or whether any parts are missing. Use the delivery
note to check the completeness of the hydraulic top
link supplied. You must complain immediately in
order to receive compensation!
Please read and comply with these Operating Inst-
ructions, especially the safety notes, before putting
the top link into service for the first time. Reading
them carefully will enable you to exploit the advan-
tages of your newly acquired product to the full.
Make sure that everyone who is to operate the
hydraulic top link reads these Operating Instructions
before they use the hydraulic top link.
Do not hesitate to contact us if you have any ques-
tions regarding these Operating Instructions or the
handling of the hydraulic top link.
Regular servicing and the timely replacement of
worn or damaged parts will increase the service life
of your hydraulic top link.
INTRODUCTORY REMARKS
These Mounting and Operating Instructions for the
user are subdivided into the following sections:
• Scope of supply
• Safety regulations
• Installing the hydraulic top link
• Operating the hydraulic top link
• General service notes
• Troubleshooting
These Mounting and Operating Instructions describe
only the installation and operation of the hydraulic
top link. They must be handed over with the
tractor in the event of sale! Refer to the appropriate
manufacturer‘s documentation for the description,
operation, servicing, etc. of the tractor.
ATTENTION
Texts marked with the pictogram shown
on the left contain safety notes that must
be observed without fail in order to avoid
accidents.
Failure to comply with these instructions can
lead to accidents, property damage and/or
personal injury, and may also invalidate our
liability and guarantee.
SPECIAL FEATURE SPECIAL EQUIPMENT
HYDRAULIC TOP LINK WITH SHOCK AB
SORBER DS
The piston rod of the hydraulic top link has a pressu-
rised pressure chamber. The gas enclosed within it
acts as a shock absorber.
CONTENTS
Figures Page 2/3/4
1. Scope of supply Page 11
2. Safety regulations Page 12
2.1 General safety regulations
2.2 Additional safety regulations for the
hydraulic top link with shock absorber
2.3 Additional function “hydraulic float setting”
for the hydraulic top link with shock
absorber (DS)
3. Installation Page 12
4. Operation Page 12
5. Maintenance notes Page 13
5.1 General service notes
5.2 Special maintenance notes for the
hydraulic top link with shock absorber
6. Troubleshooting Page 14
All rights reserved. Reproduction, even in part, and
translation are not permitted without the written
consent of Walterscheid GmbH. All rights under
copyright law are expressly reserved by
Walterscheid GmbH.
We reserve the right to make technical changes in
line with progress.
GB

11
1. SCOPE OF SUPPLY
A. HOLHS hydraulic top link (Fig. A1) Swivelling
eyebolt on tractor side Hook on implement side
1 Base unit
3 Bolt
4 Coiled spring pin
5 Support clip
6 Release cord
7 Ball bush
B. HOLKS hydraulic top link (Fig. A2) Swivelling
eyebolt on tractor side Eyebolt on implement side
1 Base unit
3 Bolt
4 Coiled spring pin
5 Support clip
C. HOLKH hydraulic top link (Fig. A3) Eyebolt on
tractor side Hook on implement side
1 Base unit
6 Release cord
7 Ball bush
9 Hoses
2. SAFETY REGULATIONS
2.1 GENERAL SAFETY REGULATIONS
• Do not use defective hydraulic top links.
Check for damage before use.
• Only original components from
Walterscheid GmbH should be used.
• Welding and/or straightening work on the
hydraulic top link is forbidden.
• Damaged components should not be used.
ATTENTION
Before putting the hydraulic top link into ser-
vice, make sure that freedom of movement
in all directions is ensured in every possible
installation position.
(See Figs. B1, B2, B3, B4 and B5).
2.2 ADDITIONAL SAFETY REGULATIONS
FOR THE HYDRAULIC TOP LINK WITH
SHOCK ABSORBER DS
• Work on the shock absorption system of the
hydraulic top link with shock absorber should
only be carried out by trained specialist sta
from specialist agricultural and construction
machinery workshops. (See instructions:
ATAS18_01, Part-No.: 113635)
ATTENTION
• Oil may leak out during the filling process!
ATTENTION
• Due to the shock absorber, the piston rod can
move up to 30 mm within the hydraulic top
link during operation.
ATTENTION
• The shock absorption function will no longer
operate when the top link is fully extended.
2.3 ADDITIONAL FUNCTION “HYDRAULIC
FLOAT SETTING” FOR THE HYDRAULIC TOP
LINK WITH SHOCK ABSORBER DS
ATTENTION
If the “float setting” function is activated, the
top link can move freely in a set path. This in-
cludes both directions in which the hydraulic
top link operates(extend / shorten).
SETTING UP AND ACTIVATING THE FLOAT
SETTING
The float setting is activated by extending
the hydraulic top link when the working
equipment is raised.
The float setting can also be set up with
equipment attached. Establish the working
length using the positioning guide (in normal
work process with lowered equipment) which
is located on the side of the top link. Raise the
equipment attached using the lifting gear,
then fully or partially retract the top link back
to the working length established before-
hand. This enables you to set the desired
width of the float area which ranges from the
shortest position approached to the working
position of the hydraulic top link.
DEACTIVATING FLOAT SETTING
To deactivate the float setting, simply extend
the top link again. The top link can of course
be retracted or extended further as you wish.
IMPORTANT:
The attached equipment must be placed on
the ground by the lifting gear for this
process.

12
PLEASE NOTE: The damping function
always remains active and is not aected by
deactivating float setting.
ATTENTION
There is a risk that the top link can be unin-
tentionally moved into the floating position
if the top link is extended under tractive load
with the implement raised.
With an activated floating position (intended
or unintended), uncontrolled movements can
occur!
This shall be illustrated by the example of a
forestry crane:
With the forestry crane attached and raised,
pivoting the forestry crane can lead to a load
shift in the direction of the tractor. This can
cause the top link to shorten uncontrollably.
This can lead to considerable personal risks
as well as damage to the machine.
3. TRACTORSIDE INSTALLATION
• Version with fork head (A1, A2):
Mount and secure the fork head (2) on the
base unit (1) by means of the bolt (3) and the
roll pin (4). Mount and secure the fork head
on the tractor by means of the tractor side
bolt. Hole and bolt diameter must match.
• Version with eyebolt (A3):
Mount and secure the eyebolt on the tractor
by means of the tractor-side bolt. Hole and
bolt diameter must match.
• Fix the support clip (5) centrally at an ap-
propriate point on the tractor rear (provide
additional fixing plate/bracket, if necessary)
(Figs. C1, C2).
ATTENTION
• Choose the fixing point of the support clip (5)
as shown in Fig.s C2 and C3.
• Attach the release cord (2) on the top link
hook.
• If necessary, the fork head (2) on the tractor
side can be replaced by a fork head with a
dierent mounting hole.
• Fit high-pressure hoses (R 3/8“ thread –
hoses not included in the Walterscheid scope
of supply, except for hydraulic top links with
eyebolt (A3) on the tractor side) to the top
link and connect them to the tractor; see the
operating instructions for the tractor.
• When using for the first time, after installati-
on of the high-pressure hoses, the hydraulic
system must be vented by repeated, comple-
te extension and retraction of the piston rod.
• When putting the top link into service, ensu-
re sucient clearance in the tractor side and
implement-side working zones (Figs. B1, B2,
B3, B4 and B5). Do not subject the top link to
bending stress.
• Damage to the piston rod (e.g. due to laying
down incorrectly or dropping) must be
avoided.
4. OPERATION
4.1 COUPLING THE IMPLEMENT WITH A
TOP LINK HOOK
• Pull and hold the release cord to open the
toplink hook
• Set the required top link length by actuating
the control valve.
• Engage the upper ball bush on the imple-
ment by means of the hook
• Release the cord.
ATTENTION
When using a top link hook, ensure that the
cord can move freely! A taut cord will release
the hook‘s locking mechanism!
The locking mechanism must engage (C3)!
4.2 COUPLING THE IMPLEMENT WITH AN
EYEBOLT
• Set the required top link length by actuating
the control valve.
• Engage and secure the eyebolt by means of
the implement-side bolt.
ATTENTION
• When putting the top link into service, ensure
sucient clearance in the tractor-side and
implement-side working zones (Figs. B1, B2,
B3, B4 and B5). Do not subject the top link to
bending stress.

13
• Actuate the control valve to set the top link to
the required service or transport position.
4.3 UNCOUPLING
• Lower the implement to the ground.
ATTENTION
• Make sure that the implement stands safely
(see implement instructions)!
• The top link must not be under load.
FOR TOP LINK HOOKS:
• Use the release cord to release the top link
hook.
• Place the top link in the support clip.
• Retract the piston rod fully by actuating the
control valve, in order to avoid dirtying/da-
maging the piston rod.
Other connections between implement and
tractor must be handled independently of the
coupling and uncoupling processes.
FOR EYEBOLTS:
• Remove the implement-side bolt on the
eyebolt.
• Place the top link in the support clip.
• Retract the piston rod fully by actuating the
control valve, in order to avoid dirtying/da-
maging the piston rod.
Other connections between implement and
tractor must be handled independently of the
coupling and uncoupling processes.
ATTENTION
Touching the hydraulic top link during
retraction is strictly forbidden – due to risk of
injury!
5. MAINTENANCE NOTES
5.1 GENERAL MAINTENANCE NOTES
Normally, the components supplied are mainte-
nance free. However, we recommend the following
checks and/or maintenance work from time to time:
• Make sure that the hydraulic system is not lea-
king. Hydraulic oil must not get into the ground.
• Clean all moving parts as required and apply com-
mercial grease to ensure their smooth operation;
excess grease must be disposed of according to
the applicable regulations; make sure that it does
not get into the ground. Relevant information can
be obtained from your dealer and/or lubricant
supplier. The following additionally applies to
hydraulic top links with hook:
• Check the securing components of the top
link hook and the swivelling eyebolt, e.g.
spring, locking bolt, retaining rings; replace
them, if necessary.
Malfunctions of the locking system are usu-
ally attributable to dirt accumulation.
• Only trained and instructed person should
work with/on the hydraulic top link. The
operator must clearly define the responsibi-
lities of these persons regarding operation,
servicing and maintenance.
Any person to be trained may only work
with/on the hydraulic top link under the
supervision of an experienced person.
The operator may only perform the work
described in these Operating Instructions.
Only specialist workshops may perform
any work or repairs on the hydraulic top
link that require special expertise. Specialist
workshops have the qualified personnel and
suitable aids (tools) necessary to perform this
work correctly and safely.
This applies to all work not described in these
Operating Instructions.
Immediately replace any components that
are not in perfect condition.
When doing so, use only original parts
from the manufacturer, or spare parts, wear
parts and consumables approved by the
manufacturer. When using spare parts and
wear parts from third-party manufacturers,
or nonapproved consumables, it cannot be
guaranteed that they are designed and ma-
nufactured to withstand the relevant stresses
and comply with safety requirements.
The manufacturer accepts no liability for
damage or losses caused by the use of
nonapproved spare parts, wear parts and
consumables, or repairs performed by non-
approved persons.
5.2 SPECIAL MAINTENANCE NOTES FOR
THE HYDRAULIC TOP LINK WITH SHOCK
ABSORBER
• Ensure the screw plug on the piston rod is firmly
tightened.
• The gas pressure should be checked by a specia-
list workshop at least 1x per year.

14
6. TROUBLESHOOTING
Fault Cause Elimination
Locking mecha-
nism cannot be
opened.
Coupling points
distorted.
Set the top link
to the load-free
length by actu-
ating the control
valve.
Locking mecha-
nism does not
engage.
Dirt accumula-
tion inside the
hook
Clean the hook
(see service
notes).
Spring broken. Replace the
spring immedi-
ately.
Release cord
taut.
Check the cord
guidance/
length; correct, if
necessary.
Unit-side bolt
nuts cannot be
removed.
Coupling points
distorted.
Set the top link
to the load-free
length by actu-
ating the control
valve.
Leak.
Oil loss on
fittings.
Fittings worked
loose.
Retighten the
fittings.
Tightening
torque of the
hollow bolts on
the check valve:
80 Nm.
Leak.
Oil loss on piston
rod.
Seals worn. Have the seals
replaced in a
specialist work-
shop.
Leakage on the
tubing.
Defective tubing. Replace the
tubing.
Change in length
under load after
a short standstill.
Piston seal worn. Have the seal
replaced in a
specialist work-
shop.
Check valve
defective
Replace check
valve
Fault Cause Elimination
Shock absorber
not functioning.
No nitrogen. Filling the pres-
sure chamber
by specialist
agricultural and
construction
machinery work-
shops.
Defective com-
ponents.
Replacing the
complete piston
rod with shock
absorber.
Top link is com-
pletely extended.
Change top link
settings (retract
at least 30 mm).
Top link is com-
pletely retracted.
Reduce drive-in
distance
Nitrogen availa-
ble. Incorrectly
filled.
Pay attention to
pressure equa-
lisation. Ensure
that the check
valve is released
when filling.
Too much nit-
rogen.
Have the
pressure and
gas fill quantity
adjusted by a
specialist work-
shop.
Locking device
for the bolt nuts
is missing.
Incorrect / defec-
tive assembly.
Install a new
coiled spring pin.
Connection bet-
ween the hook
and ball is no
longer secure.
Wear. Check the ball,
hook and locking
pin for wear
and replace if
damaged.

21
NOTIZEN / NOTES / REMARQUES

22
NOTIZEN / NOTES / REMARQUES

23

WALTERSCHEID GMBH
Hauptstraße 150
D-53797 Lohmar
Tel: [phone]
Fax: [phone]
www.walterscheid.com
Die vorliegenden Angaben sind nicht bindend. Die Walterscheid GmbH
hält sich technische Änderungen vor ohne Mitteilung.
www.walterscheid.com
ATAS1701.2_200241 | DE/GB/FR