PRONAR T644/1 User manual

LOG TRAILER WITH GRAPPLE LOADER
T644/1
MACHINE IDENTIFICATION
SYMBOL /TYPE: T644/1
SERIAL NUMBER: S
Z B 6 4 4 1 X X X

INTRODUCTION
Information contained herein is current at date of publication. As a result of improvements,
some numerical values and illustrations contained in this publication may not correspond to
the factual specification of the machine supplied to the user. The manufacturer reserves the
right to introduce design changes in machines produced that facilitate operation and improve
the quality of their work, without making minor amendments to these operating instructions.
Please send comments and observations on the subject of the design and operation of the
machine to the manufacturer. This information enables objective evaluation of the machines
produced and provides indications for their further modernisation. Information on significant
design changes are passed on to users with the aid of the information insert attached to
these operating instructions (annexes).
The operating instructions are an integral part of the machine's documentation. Before using
the tractor, the user must familiarise himself with the content of these instructions and
observe all recommendations. This guarantees safe operation and ensures malfunction free
work of the machine. The machine is designed to meet obligatory standards, documents and
legal regulations currently in force.
The instructions describe the basic principles of safe use and operation of T644/1 log trailer
with grapple loader. If the information contained in the operating instructions needs
clarification then the user should refer for assistance to the sale point where the machine was
purchased or to the manufacturer.
Manufacturer's address:
PRONAR Sp. z o.o.
ul. Mickiewicza 101A
17-210 Narew
Contact telephones
[phone] [phone]
[phone] [phone]

Information, descriptions of danger and precautions and also recommendations and orders
associated with user safety instructions are marked:
and also preceded by the word "DANGER”. Failure to observe the instructions may
endanger the machine operator's or other person's health or life.
Particularly important information and instructions, the observance of which is essential, are
distinguished in the text by the sign:
and also preceded either word "ATTENTION". Failure to observe the instructions may lead
to damage to the machine as a result of improper operation, regulation or use.
In order to focus the user's attention on the need to perform technical maintenance, the
relevant section of the operating instructions is marked with the pictogram:

TABLE OF CONTENTS
1 BASIC INFORMATION 1.1
1.1 IDENTIFICATION 1.2
1.2 INTENDED USE 1.3
1.3 FITTINGS 1.5
1.4 WARRANTY CONDITIONS 1.5
1.5 TRANSPORT 1.7
1.6 ENVIRONMENTAL HAZARDS 1.7
1.7 WITHDRAWAL FROM USE 1.8
2 SAFETY IN USE 2.1
2.1 BASIC SAFETY PRINCIPLES 2.2
2.2 PRINCIPLES WHEN TRAVELLING ON PUBLIC ROADS 2.7
2.3 DESCRIPTION OF MINIMAL RISK 2.8
2.4 INFORMATION AND WARNING STICKERS 2.9
3 CONSTRUCTION AND PRINCIPLE OF OPERATION 3.1
3.1 TECHNICAL SPECIFICATION 3.2
3.2 LOAD BOX 3.3
3.3 LOADER 3.4
3.4 AXLE SYSTEM 3.6
3.5 ELECTRICAL SYSTEM, WARNING SIGNS AND INDICATORS 3.7
3.6 WORKING BRAKE 3.8
3.7 CENTRAL HYDRAULIC SYSTEM 3.12
3.8 FRAME EXTENSION HYDRAULIC SYSTEM 3.18
3.9 POWER STEERING HYDRAULIC SYSTEM 3.19
4 CORRECT USE 4.1
4.1 PREPARING FOR WORK BEFORE FIRST USE 4.2
4.2 CHECKING THE TRAILER'S TECHNICAL CONDITION 4.3
4.3 ATTACHING TO TRACTOR 4.5
4.4 RELOADING WORK 4.6
4.5 TRANSPORTING THE TRAILER 4.10

4.6 DISCONNECTING FROM TRACTOR 4.12
4.7 PROPER USE AND MAINTENANCE OF TYRES 4.13
5 TECHNICAL MAINTENANCE 5.1
5.1 INSPECTION OF WHEEL AXLE BEARINGS 5.2
5.2 REGULATION OF MAIN BRAKES 5.4
5.3 REGULATION OF ROCKER ARM BEARING 5.6
5.4 PNEUMATIC SYSTEM OPERATION 5.8
5.5 HYDRAULIC SYSTEM OPERATION 5.12
5.6 STORAGE 5.14
5.7 LUBRICATION 5.15
5.8 TIGHTENING TORQUE FOR NUT AND BOLT CONNECTIONS 5.19
5.9 FAULTS AND MEANS OF REMEDYING THEM 5.20
5.10 LIST OF BULBS 5.22

1.1
SECTION
1
BASIC INFORMATION
IDENTIFICATION
INTENDED USE
FITTINGS
WARRANTY CONDITIONS
TRANSPORT
ENVIRONMENTAL HAZARDS
WITHDRAWAL FROM USE

1.2
1.1 IDENTIFICATION
FIGURE 1.1A Location of the data plate and serial number
(1) data plate, (2) serial number
The T644/1 log trailer was labelled using a data plate (1), located on the angle brace of the
right longitudinal rail, and a serial number (2) located on a rectangular silver painted area.
When buying the trailer check that the serial numbers on the machine agree with the number
written in the WARRANTY BOOK, in the sales documents and in the OPERATING
INSTRUCTIONS.
The meaning of the individual fields found on the data plate are presented in the table below:
A – symbol of the machine (T644/1),
B – trailer's date of manufacture,
C – seventeen digit serial number of the trailer (VIN),

1.3
D – official certificate number (not applicable),
E – tare weight of the trailer,
F – maximum gross weight,
G – capacity,
H – maximum hitch load (vertical load),
I – maximum vehicle axle load.
The serial number and type of the axle shaft is stamped on the data plate riveted to the beam
of the axle shaft.
1.2 INTENDED USE
The T644/1 log trailer with grapple loader is intended as a towed agricultural machine,
designed to be connected to and used with an agricultural tractor.
The T644/1 is designed for rolling and carrying wood logs. Rolling involves loading wood
using the grapple of the foreloader from the place in the forest where it is logged (from
thinning, clearing or other types of logging) onto the loading area of the trailer, delineated
with stakes. By carrying is meant transporting wood loaded onto the trailer to the place where
it is unloaded.
The trailer may be towed on public roads provided the detailed requirements of a given
country's legislation are fulfilled.
The trailer must not be used in any way other than that described above. Using it as intended
also involves all actions connected with the safe and proper operation and maintenance of
the machine.
Due to the above, the user is obliged to:
•familiarise himself with the contents of the OPERATING INSTRUCTIONS and
comply with them,
•understand the operating principle of the trailer and of its safe and proper use,
•comply with general safety regulations while working,
•prevent accidents,
•comply with road traffic regulations.

1.4
The trainer is not intended or designed for transporting people or animals.
IMPORTANT!
The trailer must not be used for purposes other than those for hich it is intended, in
particular:
•for transporting people and animals,
•using the trailer for transporting any materials other than those stipulated in the
instructions.
The braking system and the light and indicator system meet the requirements of road traffic
regulations. The maximum speed of the trailer on public roads is 30 km/h in Poland (pursuant
to Road Traffic Act of June 20th 1997, art. 20). In the countries where the trailer is used, the
limits stipulated by the road traffic legislation in force in a given country must be observed.
The trailer's speed must not, however, be greater than the maximum design speed.
TABLE 1.1 THE AGRICULTURAL TRACTOR'S REQUIREMENTS
CONTENTS MEASURED
AS REQUIREMENTS
Brake system
Pneumatic system 1 - conduit
Pneumatic system 2 - conduit
Pressure rating of the pneumatic system
Hydraulic brake system
Pressure rating of the hydraulic system
-
-
kPa
-
MPa
socket compliant with PN-
ISO 1728:2007
sockets compliant with PN-
ISO 1728:2007
600
socket with ISO 7241-A type pin
11.0 – 13.0
Hydraulic system
Hydraulic oil
Pressure rating of the system
Hydraulic pump capacity (min)
-
MPa
l/min
HL 32
18
40
Electrical system
Electrical system voltage
Attachment socket
V
-
12
7 polar compliant with ISO 1724

1.5
CONTENTS MEASURED
AS REQUIREMENTS
Tractor hitches
Minimum vertical load capacity of hitch - kg 2 000
Other requirements
Minimum power demand kW /KM 47.7 / 65
1.3 FITTINGS
TABLE 1.2 FITTINGS OF THET644/1 TRAILER
FITTINGS T644/1
OPERATING INSTRUCTIONS SD
WARRANTY BOOK SD
Connection lead for the electrical system SD
Drawbar with fixed drawbar eye ∅40 mm SD
Drawbar with rotating drawbar eye ∅50 mm OP
Drawbar with ball joint towing attachment ∅80 mm OP
Power steering hydraulic system SD
Hydraulically operated back frame SD
Single conduit pneumatic brake system SD
Double conduit pneumatic brake system OP
Hydraulic brake system OP
Slow-moving vehicle warning sign OP
Wheel wedges OP
SD – standard fittings, OP – fittings available at the customer's request
1.4 WARRANTY CONDITIONS
"PRONAR" Sp. z o.o. in Narew guarantees the reliable operation of the machine when it is
used according to the technical usage instructions described in the OPERATING

1.6
INSTRUCTIONS. Faults discovered during the warranty period will be rectified by the
Warranty Service within no more than 14 working days of the machine being received for
repair by the Warranty Service, or within another agreed time.
The guarantee does not cover those parts and sub-assemblies of the machine which are
subject to wear in normal usage conditions, regardless of the warranty period. The warranty
service only applies to such cases as: mechanical damage which is not the user's fault,
factory defects of parts, etc. Consumables include the following parts/sub-assemblies:
•tyres,
•brake pads,
•bulbs.
In the event of damage arising from:
•mechanical damage which is the user's fault, caused by road accidents,
•by inappropriate use, regulation or maintenance, use of the trailer for purposes
other than those for which it is intended,
•use of a damaged trailer,
•repairs carried out by unauthorised persons, improperly carried out repairs,
•arbitrary and wilful adjustments to the trailer's structure,
the user may lose the right to warranty service.
IMPORTANT!
Demand that the seller carefully and precisely fills out the WARRANTY BOOK and
guarantee repair coupons. A missing date of purchase or sale point stamp, may make
the user ineligible for any arranty repair or refund.
The user is obliged to report immediately on noticing any wear in the paint coating or traces
of corrosion, and to have the faults rectified whether they are covered by the guarantee or
not. Detailed guarantee regulations are contained in the WARRANTY BOOK attached to
each machine.

1.7
1.5 TRANSPORT
The trailer is ready for sale in a completely assembled state and does not require packing.
Packing is only required for the machine's technical and driving documentation, connection
lead for the electrical system and any extra fittings.
IMPORTANT!
When transporting independently, the user must familiarise himself ith the content of
these instructions and observe their recommendations. When being transported on a
motor vehicle the trailer must be mounted on the vehicle's platform in accordance ith
the transport safety requirements. The driver of the vehicle should take particular care
hile driving. This is due to the vehicle's centre of gravity shifting up ards hen loaded
ith the machine.
The trailer is delivered to the user either transported on a vehicle or, after being attached to a
tractor, independently (towed). In the case of independent (towed) delivery, the "slow moving
vehicle" plaque should be attached. The towing speed should be adapted to the current road
conditions, but must not be greater than the maximum design speed. The machine may sway
when being towed. Should this happen, the driving speed should be decreased.
When loading and unloading the trailer, comply with the general principles of workplace
health and safety for reloading work. Persons operating reloading equipment must have the
qualifications required to operate these machines.
The trailer should be attached firmly to the platform of the vehicle using straps or chains fitted
with a tightening mechanism. The fastening equipment used must have a valid safety
certificate. Wedges or other objects without sharp edges should be placed under the wheels
of the trailer to prevent it from rolling. The wedges must be fixed to the platform of the
vehicle. During reloading work, particular care should be taken not to damage parts of the
machine's fittings or the lacquer coating.
1.6 ENVIRONMENTAL HAZARDS
A hydraulic oil leak constitutes a direct threat to the natural environment owing to its limited
biodegradability. While carrying out maintenance and repair work which involves the risk of
an oil leak, this work should take place on an oil resistant floor or surface. In the event of oil
leaking into the environment, first of all safeguard the source of the leak, and then remove

1.8
the leaked oil using available means. Remaining oil should be removed using sorbents, or by
mixing the oil with sand, sawdust or other absorbent materials. The oil pollution, once
gathered up, should be kept in a sealed, marked, hydrocarbon resistant container, and then
passed on to the appropriate oil waste recycling centre. The container should be kept away
from heat sources, flammable materials and food.
Oil which has been used up or is unsuitable for further use owing to a loss of its properties
should be stored in its original packaging in the conditions described above.
1.7 WITHDRAWAL FROM USE
Should the user decide to withdraw the machine fro use, the entire trailer should be taken to
a scrap yard. When spare parts are changed, worn out or damaged parts should be taken to
a collection point for recyclable raw materials. Hydraulic oil should be taken to the
appropriate facility dealing with the re-use of this type of waste.

2.1
SECTION
2SAFETY IN USE
BASIC SAFETY PRINCIPLES
PRINCIPLES WHEN TRAVELLING ON PUBLIC ROADS
DESCRIPTION OF MINIMAL RISK
INFORMATION AND WARNING STICKERS

2.2
2.1 BASIC SAFETY PRINCIPLES
•Before using the trailer, the user must thoroughly familiarise himself with the
content of these instructions. While using it, follow all the recommendations
contained in them.
•The trailer may only be used and operated by persons qualified to drive
agricultural tractors and trained in the use of the machine.
•If the information contained in the operating instructions is difficult to
understand, contact a seller who runs an authorised technical service on behalf
of the manufacturer, or contact the manufacturer directly.
•Careless and improper use and operation of the trailer, and non-adherence to
the recommendations included in these instructions are dangerous for the
health.
•Be warned that a minimal risk does exist, and for this reason the fundamental
basis for using this machine should be the application of safety principles and
sensible behaviour.
•The trailer must never be used by persons who are not authorised to drive
agricultural tractors, including children and people under the influence of alcohol
or other drugs.
•Non-adherence to the principles of safe use creates a danger for the health and
life of the operator and others.
•The trailer must not be used for purposes other than those for which it is
intended. Anyone who uses the machine other than the way intended takes full
responsibility on himself for any consequences of this use. Use other than
intended means using the machine in any way other than that specified in the
operating instructions.
•Any modification to the trailer frees PRONAR Narew from any responsibility for
damage or detriment to health which may arise as a result.
•Before using the trailer always check its technical condition, especially in terms
of safety. In particular, check the technical condition of the hitch system, the

2.3
axle system, indicator lights, safety guards and the connective elements of the
hydraulic and brake systems.
•The trailer can only be stood on when it is absolutely motionless and the tractor
engine is switched off. The tractor must be immobilised with the parking brake,
and the trailer protected against rolling with wedges.
•When not connected to the tractor, the trailer must be protected against rolling
with wedges or other objects without sharp edges placed under the front and
back wheels.
•People or animals must not be carried.
•The trailer may only be used when all the safety guards and other protective
elements are technically sound and correctly positioned. In the event of loss or
destruction of the safety guards, they must be replaced with new ones.
•The machine must not be used when not in working order.
•The trailer's maximum carrying capacity must not be exceeded. Exceeding the
carrying capacity may lead to damage to the machine, loss of stability while
driving, scattering of the load and danger working or driving conditions.
•Loading and unloading must take place on horizontal terrain. However, should it
be necessary to carry out reloading work on sloping ground, the work must be
carried out with the grapple loader pointing towards whichever side of the trailer
is higher.
•While moving, the grapple loader must be arranged in the transportation
position.
•Be especially careful when attaching the machine.
•When attaching, there must be nobody between the trailer and the tractor.
•The trailer and tractor must not be attached if the hydraulic oil in the two
machines is of different types.
•While connecting the trailer to the tractor, use the appropriate hitch on the
tractor depending on the drawbar attachment it has. After linking the machine,
check the safeguards.

2.4
•The arrangement of the load may not cause an overload on the axle or hitch
system of the trailer or tractor.
•The hydraulic system is under high pressure when operating.
•Regularly check the technical condition of the connections and the hydraulic
and pneumatic leads.
•In the event of a fault in the hydraulic or pneumatic system, disconnect the
trailer from use until the fault has been fixed. There must not be any leaks of
hydraulic oil.
•When connecting the hydraulic conduits to the tractor, make sure that the
hydraulic systems of the tractor and trailer are not under pressure.
•Reduce the oil or air pressure in the trailer before dismantling the hydraulic or
pneumatic elements.
•In the event of injuries being caused by pressurised hydraulic oil, contact a
doctor immediately. Hydraulic oil may find its way under the skin and cause
infections.
•Use the hydraulic oil recommended by the manufacturer. Never mix two types
of oil.
•After changing the hydraulic oil, the used oil should be properly disposed of.
•When working on the tyres, wedges or other objects without sharp edges
should be placed under the wheels of the trailer to prevent it from rolling.
•Repair work on the wheels or tyres should be carried out by persons trained
and entitled to do so. This work should be carried out using appropriately
selected tools.
•After removing a wheel, always check how firmly the nuts are screwed in.
Individual checks should be made after the first use, after the first journey with a
load, after travelling 1000 km and then every 6 months. The above actions
should be repeated individually if a wheel has been removed from the wheel
axle.
•Loading and unloading work should be carried out by someone experienced in
forestry work.

2.5
•The load may not protrude further out than the upper edge of the trailer's front
wall. The load must be arranged in such a way that it does not threaten the
stability of the trailer while parked or in motion, and does not hinder driving.
•The load must be placed in the loading bay in such a way that it cannot move
around by itself. If necessary, use the appropriate means to properly safeguard
the load.
•Before starting loading, the stabilising props must be unfolded and the parking
props folded.
•The maximum carrying capacity of the trailer and the grapple loader lift must not
be exceeded.
•In the event of work requiring the trailer to be raised, use properly certified
hydraulic or mechanical lifts for this purpose. After lifting the trailer, stable and
durable supports must also be used. Work must not be carried out under a
machine which has only been raised with a lift.
•The trailer must not be supported using fragile elements (bricks or concrete
blocks).
•Check the tyre pressure regularly. Owing to the large temperature differences in
winter, it is recommended that the air pressure be checked more often.
•In the event of any fault or damage whatsoever, disconnect the trailer from use
until the fault has been fixed. The machine must not be used when not in
working order.
•When operating the machine wear protective gloves and use the appropriate
tools.
•Servicing and repair work should be carried out in line with the general
principles of workplace health and safety. In the event of injury, the wound must
be immediately cleaned and disinfected. In the event of more serious injuries,
seek a doctor's advice.
•Unauthorised regulation of the hydraulic manifold's settings is strictly forbidden.
•Repair, maintenance and cleaning work should be carried out with the tractor's
engine switched off and the ignition key removed.

2.6
•Regularly check the condition of the screw and nut connections.
•Before welding or electrical work, the trailer should be disconnected from the
power supply. The paint coating should be cleaned. Burning paint fumes are
poisonous for people and animals. Welding work should be carried out in a well
lit and well ventilated space.
•During welding work pay attention to flammable or fusible elements (parts of the
pneumatic, electric and hydraulic systems, plastic parts). If there is a risk that
they will catch fire or be damaged, they should be removed or covered with
non-flammable material before commencing welding work.
•During the warranty period, any repairs may only be carried out by a Warranty
Service authorised by the manufacturer.
•Should it be necessary to change individual parts, use only those parts
indicated by the manufacturer. Non-adherence to these requirements may
cause danger to the health and the user's and other people's lives, and also
damage the machine.
•After completing work connected with greasing, remove excess oil or grease.
•Before activating the trailer, always ensure that all the safety guards are in good
condition and in place. Damaged or incomplete sub-assemblies must be
exchanged for original new ones.