Humbaur HTK Series User manual

Operating manual
en
Serie 10000 humbaur.com
HTK three-way tipper (5 t - 7.5 t)
Multifunction construction transporter

1
This operating manual must be read,
understood and complied with in all
points by all persons responsible for
the vehicle manufactured by
Humbaur GmbH and its subassemblies.
Humbaur GmbH accepts no liability for
damage and malfunctions resulting from
failure to comply with these instructions!
For this reason, read this oper-
ating manual before using the
vehicle for the first time and
heed all instructions, warnings
and notes contained therein!
Note that the illustrations are intended to
serve as examples and that the design /
equipment shown may vary from that of
your specific vehicle.
Also read and observe the oper-
ating manuals for components
such as axles, landing gear, etc!
The technical documentation is part of
the product and should be kept in the
driver's cab of the towing vehicle at all
times for reference.
This operating manual draws attention to
particularly important details with regard
to the operation and use of the trailer and
to the required care and maintenance
work. Only with this information is it
possible to avoid errors and ensure fault-
free operation.
The manufacturer reserves the right to
correct errors and make technical
changes to the design, equipment and
accessories referred to in the informa-
tion, illustrations and descriptions of the
operating manual.
Humbaur GmbH
Mercedesring 1
89368 Gersthofen (Germany)
No claims whatsoever may consequently
be derived from the information, illustra-
tions and descriptions contained herein.
Obligations of the operating company
Only operate the trailer when it is in
perfect condition.
Ensure that the operating manual is
included when the trailer is sold on,
for example.
Use only trained and instructed
personnel.
Ensure compliance with the
operating manual throughout
the life of the trailer and that
the correct personal protective
equipment (See "Personal
protective equipment / rules and
prohibited activities" on page 21)
is used.
Provide the required operating and auxil-
iary materials.

2
Contents of this operating manual
Identification
Dimensions, weights and performance
data can be found in the trailer's registra-
tion documents.
Enter a cross next to the relevant trailer on delivery.
Vehicle type Version 
Three-way tipper, tandem (total mass 5 t) HTK 504020
Three-way tipper, tandem (total mass 6.5 t) HTK 654020
Three-way tipper, tandem (total mass 7.5 t) HTK 754020


3
Contents of this operating manual
Index
Use the Index starting on page 5to
search for specific topics.
1 Safety
The chapter "Safety," starting on page 9,
contains safety-relevant information on
correct handling of the trailer.
Read this chapter before driving with
the trailer for the first time.
2 General Information
The chapter entitled "General informa-
tion," starting on page 23, provides infor-
mation on vehicle identification.
3 Operation
The chapter "Operation," starting on
page 33, provides information on loading
and unloading, correct distribution of
loads and hitching / unhitching and
coupling / uncoupling the trailer.
4 Operating the chassis
In the chapter "Operating the chassis,"
starting on page 55, you will find all you
need to know about the chassis oper-
ating elements, for example the raising/
lowering system and landing gear, as
well as information on safe loading and
unloading.
5 Body
The chapter "Body," starting on page 97,
explains how to operate the body
correctly, for example how to fold down
the drive-up ramps and which equipment
you can use to secure loads.
6 Electrical system
In the chapter "Electrical system,"
starting on page 135, you will find infor-
mation on the lights, connectors and
connector assignments.
7 Inspection, care and mainte-
nance
The chapter "Inspection, care and main-
tenance," starting on page 153,
describes the activities required for main-
taining the operational safety and value
of your vehicle.
8 Troubleshooting
The chapter entitled "Troubleshooting,"
starting on page 203, tells you what to do
in the event of problems or malfunctions
and provides contact details for the
service team.

Contents of this operating manual
4

5
Index
Towing eye connection 235
A
ABS . . . . . . . . . . . . . . . . . . . . 57
Access aids . . . . . . . . . . . . . . 132
Address
Manufacturer . . . . . . . . . . . . . . 1
Replacement parts . . . . . . . . 205
Service . . . . . . . . . . . . . . . 205
Aluminium surfaces . . . . . . . . . 198
Approved operating materials . . 199
B
Batteries
Battery charging point. . . . . . . . 74
Charging . . . . . . . . . . . . . . 172
Disposal. . . . . . . . . . . . . . . 200
Body . . . . . . . . . . . . . . . . . . . 97
Brake matching . . . . . . . . . . . . 12
Brake name plate . . . . . . . . . . 180
C
Cable clips . . . . . . . . . . . . . . 179
Care. . . . . . . . . . . . . . . . . . . 153
Central lubrication . . . . . . . . . . 160
Chapter
Electrical system. . . . . . . . . . 135
General Information . . . . . . . . . 23
Inspection, care and maintenance 153
Operating the chassis . . . . . . . . 55
Operation. . . . . . . . . . . . . . . 33
body 97
Safety . . . . . . . . . . . . . . . . . . 9
Troubleshooting . . . . . . . . . . . 203
Chassis
Operation. . . . . . . . . . . . . . . 55
Check before driving off . . . . . . . 53
Check when parking . . . . . . . . . 53
Cleaning
Alloy disc wheels . . . . . . . . . . 195
Cleaning the coupling heads. . . . 184
Cleaning the Duo-Matic coupling . 183
Cleaning the line filter . . . . . . . . 182
Coefficient of friction matching. . . 126
Compressed air tank . . . . . . . . . 66
Connection element . . . . . . . . . 43
Connector
13-pin (ISO 11446-12V) . . . . . . 144
15-pin (ISO 12098-24V) . . . . . . 142
7-pin (ISO 1185-24V) . . . . . . . . 146
7-pin (ISO 1724-12V) . . . . . . . . 143
7-pin (ISO 3731-24V) . . . . 146, 147
7-pin (ISO 7638 - EBS). . . . . . . 145
ABS/EBS . . . . . . . . . . . . . . . 57
Connector pin assignment
13-pin (ISO 11446-12V) . . . . . . 144
15-pin (ISO 12098-24V) . . . . . . 142
7-pin (ISO 1185-24V) . . . . . . . . 146
7-pin (ISO 1724-12V) . . . . . . . . 143
7-pin (ISO 3731-24V) . . . . 146, 147
7-pin (ISO 7638 - EBS). . . . . . . 145
Contact
Humbaur Service Partners . . . . 205
Parts logistics . . . . . . . . . . . . 205
Technical Customer Service . . . 205
Coupling . . . . . . . . . . . . . . . . . 48
Hydraulic line . . . . . . . . . . . . . 70
Coupling heads
Red (supply line) . . . . . . . . . . . 59
Yellow (brake). . . . . . . . . . . . . 59
D
Danger of toppling . . . . . . . . . . . 35
Defective wheel . . . . . . . . . . . . 178
Diagnostics connection for EBS / ABS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Disposal
Batteries . . . . . . . . . . . . . . . 200
Tyres . . . . . . . . . . . . . . . . . 200
Used oil/lubricants . . . . . . . . . 200
Disposing of operating materials . 200
Disposing of tyres. . . . . . . . . . . 200
Disposing of used oil/lubricants . . 200
Documentation
Axle/wheel maintenance . . . . . . 155
Certificate of general inspection/safety
assessment . . . . . . . . . . . . . 155
Support equipment maintenance . 155
Draining the compressed air tank . 67
Driving off. . . . . . . . . . . . . . . . . 17

Index
6
E
EBS . . . . . . . . . . . . . . . . . . . . 57
EBS connector
7-pin (ISO 7638) . . . . . . . . . . 145
EC Declaration of Conformity . . . 31
Electrical system. . . . . . . . . . . 135
Servicing . . . . . . . . . . . . . . 185
Troubleshooting . . . . . . . . . . 207
Electro-hydraulic unit . . . . . . . . 171
General . . . . . . . . . . . . . . . . 71
Switching off the power supply . . 74
Environmental pollution
Toxic substances . . . . . . . . . 200
Environmental protection regulations
194
F
Fixings . . . . . . . . . . . . . . . . . 179
Fixings, cable clips . . . . . . . . . 179
Folding support . . . . . . . . . . . . 79
Form-fit load securing . . . . . . . 131
Friction-lock load securing . . . . 129
Front wall . . . . . . . . . . . . . . . 102
G
Galvanised steel surfaces. . . . . 197
General Information. . . . . . . . . . 23
Getting the spare wheel ready . . 178
H
High-pressure cleaners . . . . . . . 195
Hydraulic connections . . . . . . . . 168
Hydraulic cylinder . . . . . . . . . . . 169
Hydraulic supply
Switchover . . . . . . . . . . . . . . 73
I
Identification . . . . . . . . . . . . . . . 2
Index . . . . . . . . . . . . . . . . . . . . 5
Inspection . . . . . . . . . . . . . . . . 153
Intended use . . . . . . . . . . . . . . 10
L
Lashing points . . . . . . . . . . . . . 130
Lateral drop-sides. . . . . . . . . . . 103
LED rear light . . . . . . . . . . . . . 149
Lettering . . . . . . . . . . . . . . . . . 192
Lettering work . . . . . . . . . . . . . 192
Licence plate light. . . . . . . . . . . 151
Light system . . . . . . . . . . . . . . 136
Lighting
Lamps . . . . . . . . . . . . . . . . 186
Limit light . . . . . . . . . . . . . . . 186
Maintenance . . . . . . . . . . . . . 185
Marking light . . . . . . . . . . . . . 186
Peripheral light. . . . . . . . . . . . 186
Terminal diagram . . . . . . . . . . 185
Lighting terminal diagram. . . . . . 185
Lights . . . . . . . . . . . . . . . . . . 186
Limit light . . . . . . . . . . . . . . . . 186
Limit lights . . . . . . . . . . . . 150, 191
Load centre . . . . . . . . . . . . . . . 42
Load definition. . . . . . . . . . . . . . 42
Load distribution . . . . . . . . . . . . 42
Loading . . . . . . . . . . . . . . . . . . 37
Loading notes . . . . . . . . . . . . . . 37
Lubricating . . . . . . . . . . . . . . . 160
Lubricating grease . . . . . . . . . . 160
Lubrication
Alloy disc wheels . . . . . . . . . . 179
Central interlock. . . . . . . . . . . 166
Draw bar height adjustment . . . . 161
Drop-side locks . . . . . . . . . . . 165
Folding legs . . . . . . . . . . . . . 161
Spindle parking brake . . . . . . . 162
Spindle support . . . . . . . . . . . 161
Support wheel . . . . . . . . . . . . 164
Telescopic cylinder . . . . . . . . . 169
Tipping bearings . . . . . . . . . . 167
Towing eye . . . . . . . . . . . . . 163
M
Maintenance . . . . . . . . . . . . . . 153
Cleaning the coupling heads . . . 184
Cleaning the line filter . . . . . . . 182
Compressed air system . . . . . . 181
Compressed air tank . . . . . . . . 181

7
Index
Draw bar height adjustment . . . 161
Electrical system. . . . . . . . . . 185
Licence plate light "LED" . . . . . 190
Licence plate light "standard" . . 190
Lighting . . . . . . . . . . . . . . . 185
Limit lights . . . . . . . . . . . . . 191
Mechanical components . . . . . 173
Peripheral light standard 24 V . . 188
Rear light "24 V - standard" . . . 187
Rear light "LED" . . . . . . . . . . 189
Service brake system . . . . . . . 180
Side marking lights . . . . . . . . 191
Wheel brake . . . . . . . . . . . . 181
Maintenance intervals
One-time maintenance work . . . 156
Regular maintenance work . . . . 157
Maintenance regulations . . . . . 156
Maintenance support . . . . . . . . 169
Manufacturer . . . . . . . . . . . . . . . 1
Marking lights. . . . . . . . . . . . . 150
Max. weights . . . . . . . . . . . . . . 42
N
Notes
Conventions in the operating manual .
19
Operating manual . . . . . . . . . . . 1
O
Operating add-on drop sides. . . . 110
Operating drop-sides. . . . . . . . . 101
Operating manual instructions. . . . 1
Operating materials
Disposal . . . . . . . . . . . . . . . 200
Lubricating grease . . . . . . . . . 160
Operating the steel grid extensions .
115
Operating the support frame . . . . 113
Operation . . . . . . . . . . . . . . . . 33
Body . . . . . . . . . . . . . . . . . 97
Chassis . . . . . . . . . . . . . . . . 55
P
Painted or powder-coated steel surfac-
es . . . . . . . . . . . . . . . . . . . . . 197
Painting . . . . . . . . . . . . . . . . . 192
Parking warning signs . . . . . . . . 95
Peripheral light. . . . . . . . . 186, 188
Personal protective equipment . . 21
Personnel qualifications . . . . . . . 16
Physical fundamentals
Friction force . . . . . . . . . . . . . 126
Pin couplings. . . . . . . . . . . . . . 47
Plug connections . . . . . . . . . . . 137
Plug connections (optional). 138, 139
Pre-assembling the charging plug 172
Pressure level . . . . . . . . . . . . . . 66
Prohibitory signs . . . . . . . . . . . . 22
Putting lifting device into position. 177
Q
Quick-release coupling
Duo-Matic . . . . . . . . . . . . . . . 64
R
Ramps
Driving over . . . . . . . . . . . . . 122
Operating . . . . . . . . . . . . . . 118
positioning . . . . . . . . . . . . . . 121
Stowing . . . . . . . . . . . . . . . 123
Rear platform gate . . . . . . . . . . 106
Fold-down operation . . . . . . . . 107
Swing mode . . . . . . . . . . . . . 108
Replacement parts address . . . . 205
Replacing lights . . . . . . . . . . . . 187
Rollover resistance. . . . . . . . . . . 35
Rubber/seals. . . . . . . . . . . . . . 198
S
Safety . . . . . . . . . . . . . . . . . . . 9
Safety instructions . . . . . . . . . . . 19
Securing the load . . . . . . . . . . . 125
Fundamentals . . . . . . . . . . . . 125
Types. . . . . . . . . . . . . . . . . 128
Securing the loading platform

Index
8
Tipping bearings . . . . . . . . . . . 75
Service address . . . . . . . . . . . 205
Service brake
Activating . . . . . . . . . . . . . . . 61
Deactivating . . . . . . . . . . . . . 61
operating . . . . . . . . . . . . . . . 60
Service brake system . . . . . . . . 57
Servicing . . . . . . . . . . . . . . 180
Servicing the compressed air system
181
Servicing the hydraulic system. . 168
Servicing the mechanical components
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Servicing the wheel brake. . . . . 181
Side guard. . . . . . . . . . . . . . . . 87
Signal words . . . . . . . . . . . . . . 19
Sources of danger. . . . . . . . . . . 16
Spare wheel holder . . . . . . . . . . 89
Spare wheel storage . . . . . . . . . 89
Maintaining . . . . . . . . . . . . . 178
Spare wheel transport . . . . . . . . 90
Spindle parking brake . . . . . . . . 62
Spindle support identification. . . . 30
Stability. . . . . . . . . . . . . . . . . . 35
Standard rear light . . . . . . . . . 148
Steam cleaners . . . . . . . . . . . 195
Support equipment
Spindle support, optional . . . . . . 85
Support wheel . . . . . . . . . . . . 82
Swing mode. . . . . . . . . . . . . . 108
Switch-off / securing mechanisms
Stroke limiter. . . . . . . . . . . . . 173
T
Tightening torques
for screw connections . . . . . . . 158
for wheel nuts . . . . . . . . . . . . 159
Toolbox . . . . . . . . . . . . . . . . . 93
Towing eye versions . . . . . . . . . 44
Track width . . . . . . . . . . . . . . . 37
Trailer
Disposal . . . . . . . . . . . . . . . 201
Securing . . . . . . . . . . . . . . . 177
Taking out of operation . . . . . . . 201
Trailer materials . . . . . . . . . . . . 196
Troubleshooting . . . . . . . . . . . . 203
Axles . . . . . . . . . . . . . . . . . 209
Brake system . . . . . . . . . . . . 207
Electrical system . . . . . . 207, 208
Hydraulic / electro-hydraulic system .
211
Loading / driving performance . . . 206
Towing eye / draw bar . . . . . . . 210
Tyre pressure / tread . . . . . . . . . 175
Tyre types. . . . . . . . . . . . . . . . 174
U
Uncoupling
Duo-Matic . . . . . . . . . . . . . . 65
Uncoupling the lines
Manual . . . . . . . . . . . . . . . . . 59
Underrun guard . . . . . . . . . . . . . 88
Unloading. . . . . . . . . . . . . . . . . 37
Use
Foreseeable misuse . . . . . . . . . 11
Intended . . . . . . . . . . . . . . . . 10
V
Vehicle Identification Number . . . . 29
VIN . . . . . . . . . . . . . . . . . . . . . 29
W
Warning signs . . . . . . . . . . . . . . 20
Warranty . . . . . . . . . . . . . . . . . 14
What to do
In the event of fire . . . . . . . . . 204
in the event of malfunctions . . . . 204
What to do in the event of fire . . . 204
Wheel bolts. . . . . . . . . . . . . . . 175
Wheel changing. . . . . . . . . . . . 176
Wheel chocks . . . . . . . . . . . . . . 92
Wheel nuts 175

9
1
2
3
4
5
6
7
8
Safety

10 Safety
Use
1
Intended use
HUMBAUR vehicles and bodies are
manufactured to the accepted engi-
neering and safety engineering stand-
ards. Nevertheless, misuse may give rise
to danger to the life and limb of operating
personnel or third parties, impairment of
the HUMBAUR vehicle and other mate-
rial damage.
HUMBAUR vehicles and bodies are
manufactured exclusively for transport
applications in accordance with the
transportation provisions.
Intended use includes adherence to
regulations, descriptions and instructions
provided in this manual and the
suppliers' operating and maintenance
manuals.
If you are planning to make later modifi-
cations to your HUMBAUR vehicle or
body, contact Humbaur GmbH or an
authorised HUMBAUR workshop in
advance.
Always consult Humbaur GmbH or an
authorised HUMBAUR workshop before
having accessory parts attached to your
HUMBAUR vehicle or body.
The following uses are permitted:
– Transport of goods
– Operation only within the range of the
total permitted payload
– Operation only with suitable towing
vehicle
– Operation only in when in technically
perfect condition
– Operation with uniform weight distri-
bution of the load
– Driving only with properly secured
load
– Driving only when in compliance with
the maximum legal speed and at
a speed adjusted to suit poor road
and weather conditions
– Loading and unloading only in secure
areas or with additional safeguards in
public streets
– Trailer always secured appropriately
to prevent rolling away when stopped /
parked
The general inspection and safety
inspection of the trailer by specialists at
the prescribed intervals as well as the
certification of these inspections are
prerequisites for participating in road
transport.
The operator / user of the trailer is under
obligation to regularly perform care /
cleaning work on the trailer as well as
maintenance.
HUMBAUR vehicles/bodies
bear a VIN (Vehicle Identification
Number) - see page 29.
Always quote the VIN when
making inquiries or ordering
replacement parts!

Safety 11
Use 1
2
3
4
5
6
7
8
Reasonably foreseeable misuse
Any use above and beyond the
prescribed transport application
is deemed to be improper use.
In particular, this includes:
– Transport of persons/animals
– Transport of goods subject to special
regulations and/or for which special
vehicle versions are necessary
(e.g. chemical substances)
– Loading with exceeded payload
– Exceeding the maximum permissible
axle/draw bar/trailing load
– Transport of hot / liquid materials
(e.g. tar)
– Driving with poorly secured or unse-
cured load
– Driving with the loading platform
tipped
– Driving with poor load distribution
(one-sided, selective loading)
– Unauthorised constructional changes
to the trailer or modifications not
approved by the manufacturer
– Use of non-authorised replacement
parts or accessories
– Driving with defective light system or
with faulty electrical system
– Driving with a dirty trailer on which the
licence plate, lighting, markings are
not visible or not clearly visible
– Driving with the body open (e.g. drop-
sides, support frame, steel grid exten-
sion, add-on drop sides, toolbox, side
guards, ramps, landing gear, etc.)
– Unauthorised maintenance / repair of
safety-relevant components which
must be maintained or repaired by
specialists only
– Driving at excessive / inappropriate
speed in poor weather conditions
and / or on bad roads
– Parking the trailer without taking
adequate safety precautions to
prevent it from rolling away
– Operating the trailer in damaged
condition and with visible part wear
or with broken safety-relevant
components
– Operating a trailer without valid brake
matching with the towing vehicle
– Operating the ramps when a person
is in the danger area
– Transport of vehicles / loads which
protrude over the total width of the
trailer
Any liability for damage resulting from
non-compliance is rejected by the
manufacturer:
Humbaur GmbH
Mercedesring 1
86368 Gersthofen (Germany)
The user shall bear sole responsibility for
any such risk.

Use
12 Safety
1
Brake matching
Brake matching must be performed to
ensure correct usage.
Unlike a drum brake, a disc brake does
not initially produce any reduction in the
braking effect detectable by the driver
when overloaded.
Such overloading can cause the brakes
of the towing vehicle or trailer to over-
heat. Brake overload can lead to a reduc-
tion in braking force, greater wear on the
brake lining and / or brake discs and
wheel bearings or axle damage.
For optimal distribution of the decelera-
tion of the entire vehicle combination,
brake matching must be carried out on
the loaded vehicle's brake system by an
independent brake service in compliance
with 71/320 EC or ECE R13, after a short
run-in distance of 2,000 to 5,000 km or
within 14 days following vehicle hand-
over and each time the towing vehicle
is changed.
Fig. 1 Warning panel on the trailer
Failure to observe these instruc-
tions and failure to provide certification of
brake matching renders all claims under
warranty against Humbaur GmbH null
and void.
WARNUNG
WARNING
nach
Überlastung der Bremsen!
Verminderte Bremswirkung durch über-
hitzte Bremsen / starker Bremsenverschleiß.
XBremskraft-Zugabstimmung
2000 - 5000 km und nach jedem
Zugmaschinenwechsel durchführen.
after 2000 - 5000 km and
Overloading of the brakes!
Reduced braking effect caused by over-
heated brakes / strong brake wear.
X
Perform Tractor / Trailer synchro-
nisation
after each exchange of tractor.
620.00127

Safety 13
Use 1
2
3
4
5
6
7
8
Disclaimer
The manufacturer accepts no liability if:
– unauthorised modifications have
been made to the trailer or its compo-
nents.
– original parts or modification parts /
accessory parts approved by
Humbaur GmbH have been replaced
with other parts.
– subsequent modification of the trailer
has been performed (e.g. new bores
have been drilled in the frame or
existing bore holes on the frame
re-drilled). This is deemed by
Humbaur GmbH to constitute struc-
tural modification and thus invalidates
the operating permit.
– non-approved accessories or
replacement parts/components from
other manufacturers which are not
original HUMBAUR parts have been
attached or installed. This invalidates
the operating permit for the trailer and
possibly even the insurance cover.
– the care and maintenance intervals
prescribed by the manufacturer are
not adhered to.
All resulting risks and liability waivers
shall continue to apply in the event that:
– acceptances have been carried out
by testers / experts from the technical
testing authorities or officially recog-
nised organisations,
– approvals have been granted by
public authorities.

14 Safety
Service and warranty cover
1
The warranty includes
Defects occurring during correct use of the trailer
as prescribed, which are design-related or can
be attributed to material faults.
Repairs carried out during the warranty period do
not extend it.
The dealer is responsible for the warranty as
a contracting party.
Requirements
Original replacement parts must be used for
repairs.
Repairs must be carried out by a specialist work-
shop.
The manufacturer's maintenance instructions
and regulations as listed in this operating manual
must have been complied with.
Defects must not be the result of
Failure to comply with the technical and legal
regulations listed in this operating manual.
Incorrect use of the trailer of lack of experience
on the part of the user.
Unauthorised modifications to the trailer or
attachments not approved by Humbaur GmbH
render the warranty invalid. Failure to comply
with the respective statutory regulations.
The following do not constitute
defects
Each trailer is a hand-made product. Despite
utmost care during assembly, superficial
scratches which have no effect on the intended
use can occur.
Stress cracks in the surface (hairline cracks)
caused during manufacture cannot be avoided.
These hairline cracks have no effect on the
stability or use of the trailer.
Gap between drop-side and loading bridge.
Furthermore, polyester components are not
100% colour-fast. Here, too, UV radiation and
weathering can cause fading.
In addition, it should be noted that as rubber
parts are generally subject to ageing as a result
of UV radiation, cracks may appear and fading of
the surface may occur.
Cathodic dip-paint coated (KTL) parts are not
colour-fast. They can fade as a result of expo-
sure to UV irradiation.
Galvanised parts are not normally shiny, but lose
their bright finish after a short time. This is not
a defect but a desired effect, as full protection
against rusting of the metal is only guaranteed
through oxidisation. Wood is a natural material.
Despite a wide variety of processing methods
and coatings, it therefore remains subject to
natural, weather-dependent expansion and
shrinkage, which can cause warping. The natural
wood grain and irregularities are normal for this
natural material and may become visible on the
surface. Fading is also possible as a result of
UV irradiation and weathering. A manufacturing
tolerance is specified for the thickness of the
wooden components used. Claims for deviations
within the tolerance will not be accepted.
As the trailers are not generally insulated, fluctu-
ations in temperature can cause condensation to
form under curtains and polyester covers. In this
case, adequate ventilation must be ensured to
prevent the formation of mould. Furthermore, the
trailers are not 100% waterproof. The ingress of
water at doors, flaps and windows is still
possible, even with the use of rubber seals and
extremely careful workmanship.

Safety 15
Service and warranty cover 1
2
3
4
5
6
7
8
The warranty will expire
If the regulations for operation, maintenance,
cleaning and inspection are not observed.
If technical modifications to the trailer are carried
out.
If unauthorised attachments or superstructures
not approved by Humbaur are fitted.
In the event of overloading or improper use of the
trailer.
If parts other than original Humbaur replacement
parts are used.
If the safety instructions on the trailer are not
observed.
If the prescribed service intervals are not
adhered to, even in the case of parts fitted by
Humbaur, such as axle, brake, draw bar,
hydraulic systems etc.
In the event of incorrect surface treatment of the
materials used.
In the event of continued use of the trailer
although defects have already been detected
and reported and although the manufacturer has
prohibited use until repairs have been effected.
In the event of continued use of a trailer with
known defects which renders repair impossible
or more time-consuming or means that repair is
only possible with significant additional expense
and reduced function of the trailer.
The warranty does not cover
Expenditure for ongoing maintenance.
Costs incurred as a result of normal wear and
tear or because the trailer has not been used for
some time.
Faults resulting from failure to handle the trailer
as prescribed.
Defects attributable to the use of parts other than
original Humbaur replacement parts.
Defects as a consequence of repairs not carried
out in a specialist workshop.
Defects resulting from structural modification or
assembly work on the vehicle.
Damage caused by snow or water on curtains,
plywood or polyester bodies.
The manufacturer reserves the right to make
design changes without notice.

16 Safety
Personnel qualifications
1
HUMBAUR vehicles and vehicle bodies
and their operating components may
only be used and serviced by persons
who are familiar with:
– this operating manual.
– the trailer with the associated towing
vehicle.
– the subsuppliers' operating and main-
tenance manuals.
– the road traffic regulations and the
road traffic licensing regulations.
– all relevant occupational safety/acci-
dent prevention regulations and other
safety engineering, occupational
health and road traffic laws.
– the correct procedures for freight
transport.
Sources of danger
It is essential that you are aware of the
following sources of danger:
– Coupling and uncoupling the trailer:
Keep the danger zone clear.
– Travelling with unsecured landing
gear.
– Driving with unsecured drive-on aids
(ramps).
– Clearance heights when on the road
and during loading and unloading.
– Driving with the loading platform
tipped - this is prohibited by law.
– Exceeding the total permitted
payload or uneven overloading due
to incorrect distribution of weight.
– Poorly secured or unsecured load
and / or body components.
– Reversing manoeuvres - check the
area behind the vehicle.
– Excessive steering during
manoeuvring.
– Overloading of the trailer, axles and
brakes.
– Overstressing as a result of fitting
wheels or tyres of incorrect sizes.
– Use of wheels with incorrect wheel
offset, unilateral runout or centrifugal
imbalance.
– Excessive strain as a result of reck-
less and inappropriate driving or
handling.
– Subjecting the axles to impact and
shock loading.
– Failure to adapt your speed to the
road conditions and the loading
status of the vehicle - especially on
bends.
– On ground that is not level or on soft
ground, the parked trailer can topple
over or sink.
– Driving on terrain with extreme
slopes.
– Loading/unloading the trailer on
steep inclines.

Safety 17
Check, adjust and secure before every journey 1
2
3
4
5
6
7
8
In the chassis area
Important general information:
– Connect the supply lines
– Establish the electrical connections
– Put the side guard in the position for
driving and secure it
– Retract the landing gear and secure it
– Check the tyres and rims for damage
– Check the tyre pressure, including
the spare wheel
– Check the tightening torque of the
wheel nuts
– With a new trailer, tighten the wheel
nuts after 50 km and after its first
journey carrying a load
– Secure:
spare wheel / spare wheel holder,
chocks
– Check the trailer's lights, and repair
any faulty lights
– Observe the permissible total weight
– Release the brakes and start to move
off only when the operating brake
pressure has been reached
– Drain the compressed air tank
– Check the licence plates and signs
– Check that the central draw bar
and trailer coupling are in perfect
condition
– Lock the trailer coupling correctly

Check, adjust and secure before every journey
18 Safety
1
Around the vehicle body
Close and secure all components of the
vehicle body, such as:
– ramps
– drop-sides
– add-on drop sides
– steel grid extensions
– support frame
– toolbox
– load securing equipment
– immobilise and secure the load
– ensure that the load is distributed
evenly