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TW 13/75G WOOD CHIPPER
INSTRUCTION MANUAL
(ORIGINAL INSTRUCTIONS)
© Copyright Timberwolf Ltd 2019
The content of this publication may not be copied, reproduced, republished, posted, broadcast, transmitted
or used in any way in any medium without the written permission of Timberwolf Ltd.
TW 13/75G
CONTENTS
C190-0187 25.01.2019 Rev: 1.0
Section Page No.
INTRODUCTION 2
PARTS LOCATOR 3
SAFE WORKING 5
Operator’s Personal Protective Equipment 5
Basic Woodchipping Safety 5
General Safety Matters 5
Noise Test 6
STORAGE 7
Storing the Chipper 7
OPERATING INSTRUCTIONS 8
Recommissioning after storage 8
Safe Transportation 8
Delivery 8
Manual Controls 8
Starting the Engine 9
Stopping the Engine 9
Emergency Stopping 9
Daily Checks Before Starting 9
Starting to Chip 9
Chipping 9
Blockages 10
Blade Wear 10
Refuelling 10
Troubleshooting 11
SERVICE INSTRUCTIONS 12
Service Schedule 12
Safe Maintenance 13
Safe Lifting of the Chipper 13
Spares 13
Check Fittings 13
Hazardous Materials and End of Machine Life 14
Change Blades 15
Tension Drive Belts 16
Grease the Rotor Bearings 16
Anvil Changing 16
Engine Servicing 16
WARRANTY STATEMENT 17
DECLARATION OF CONFORMITY 18
IDENTIFICATION PLATE 19
DECALS 20
CIRCUIT DIAGRAM 22
V-BELT TENSIONING TABLE 23
WARRANTY SERVICE CHECK RECORD 24
SERVICE RECORD 25
PARTS LISTS 26
1 / 32
1600 mm (815 mm with funnel removed)
1565mm
(815mm with
funnel removed)
800mm
Designed to chip solid wood material up to 75mm in diameter and capable of
chipping over 0.75 tonnes of brushwood per hour.
PURPOSE
Engine type:
Honda 4 stroke OHV
Maximum power:
9.6kW (13hp)
Cooling method:
Air cooled
Overall weight:
188kg
Starting method:
Recoil
Type of feed:
Gravity
Maximum diameter material:
75 mm (3”)
Fuel capacity:
6.5 litres
Material processing capacity:
Up to 0.75 tonnes/hr
Fuel type:
Unleaded petrol
DIMENSIONS
TW 13/75G
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INTRODUCTION
C190-0187 25.01.2019 Rev: 1.0
Thank you for choosing Timberwolf. Timberwolf chippers are designed to give safe
and dependable service if operated according to the instructions.
IMPORTANT HEALTH AND SAFETY INFORMATION
Before using your new chipper, please take time to read this manual. Failure to do
so could result in:
- personal injury
- equipment damage
- damage to property
- 3rd party injuries
This manual covers the operation and maintenance of the Timberwolf TW 13/75G.
All information in this manual is based on the latest product information available at
the time of purchase.
All the information you need to operate the machine safely and effectively is
contained within pages 3 to 11. Ensure that all operators are properly trained for
operating this machine, especially in safe working practices.
Timberwolf's policy of regularly reviewing and improving their products may involve
major or minor changes to the chippers or their accessories. Timberwolf reserves
the right to make changes at any time without notice and without incurring any
obligation.
Due to improvements in design and performance during production there may be,
in some cases, minor discrepancies between the actual chipper and the text in this
manual.
The manual should be considered an important part of the machine and should
remain with it if the machine is resold.
CAUTION or WARNING
BE AWARE OF THIS SYMBOL
AND WHERE SHOWN,
CAREFULLY FOLLOW THE
INSTRUCTIONS.
THIS SYMBOL INDICATES
IMPORTANT SAFETY
MESSAGES IN THIS MANUAL.
WHEN YOU SEE THIS
SYMBOL, BE ALERT TO THE
POSSIBILITY OF INJURY TO
YOURSELF OR OTHERS AND
CAREFULLY READ THE
MESSAGE THAT FOLLOWS.
ALWAYS FOLLOW SAFE
OPERATING AND
MAINTENANCE PRACTICES
TW 13/75G SPECIFICATION
Serial No. Location.
The serial number
can be found on
the identification
plate located on
the rotor housing.
TW 13/75G
3 / 32
PARTS LOCATOR
C190-0187 25.01.2019 Rev: 1.0
THE TW13/75G HAS THE FOLLOWING FIXED GUARDS FOR PROTECTION OF THE OPERATOR, CHIPPER
AND ENVIRONMENT:
Funnel: Protects the user from injuries from moving parts and ejected material during operation. •
Exhaust Guard: Protects exhaust from damage. Protects the user from heat injuries. •
Top Rotor Housing Guard: Protects user from rotational parts e.g. cutting blades. The interlocking switch disengages •
the engine when the hatch is opened to stop the chipper running.
Safety Switch Guard: Prevents user overriding the interlocking switch. •
Belt Guard: Protects the user from rotational parts e.g. belts and pulleys, hot surfaces and engine fluids. Protects •
machine from ingress of environmental debris.
Guards may be removed for maintenance only, as described in the Service Instruction pages of this manual. Ensure guards
remain in place throughout operation.
GRIP
FUNNEL
DISCHARGE BUCKET
TOP ROTOR HOUSING
GUARD
BELT GUARD
ENGINE
PETROL TANK
AIR FILTER COVER
DISCHARGE HANDLE
OPENING HANDLE
ROTOR HOUSING CATCH BOLT
SAFETY SWITCH
MANUAL CANNISTER
LIFTING EYE
EXHAUSTGUARD
TW 13/75G
4 / 32
PARTS LOCATOR
C190-0187 25.01.2019 Rev: 1.0
TOOL BOX CONTENTS:
Copper Ease •
Rotor Retaining Pin •
Combination Spanner (17mm/19mm) •
Blade bolts •
Star (torx) tip and driver •
Shaft & handle tools•
ROTOR
FAN BLADE
CUTTER BLADE
ROTOR DRIVE PULLEY
REAR BEARING
HOUSING
ENGINE PROTECTOR
ENGINE PULLEY
EMERGENCY STOP
FEED FUNNEL CURTAINS
FRONT BEARING
HOUSING
5 / 32
SAFE WORKING
Always stop the chipper engine before making any adjustments, refuelling or cleaning. •
Always check the rotor has stopped rotating before maintenance of any kind, or whenever the machine is to be left •
unattended. If in doubt, look through the in-feed funnel to see if rotor is still moving.
Always check the machine is well supported and cannot move. If working on an incline, position on solid ground, across •
the slope.
Always operate the chipper with the engine set to maximum speed when chipping. •
Always check (visually) for fluid leaks. If found, resolve the leak before operating the chipper. •
Always take regular breaks. Wearing personal protective equipment for long periods can be tiring and hot. •
Always keep hands, feet and clothing out of feed opening, discharge and moving parts. Under no circumstances should •
you reach into the funnel.
Always keep the operating area clear of people, animals and children. •
Always keep the operating area clear from debris build up. •
Always keep clear of the chip discharge tube. Foreign objects may be ejected with great force. •
Always ensure protective guarding is in place before commencing work. Failure to do so may result in personal injury •
or loss of life.
Always operate the chipper in a well ventilated area - exhaust fumes are dangerous. •
Ensure a fire extinguisher is available on site. •
Ensure a personal first aid kit and hand cleaning materials are available (e.g. waterless skin cleanser).•
TW 13/75G
C190-0187 25.01.2019 Rev: 1.0
WARNING
Chainsaw safety helmet (EN 397) fitted with mesh visor (EN 1731) and •
ear defenders (EN 352).
Work gloves with elasticated wrist. •
Steel toe cap safety boots (EN 345-1). •
Close fitting heavy-duty non-snag clothing. High-visibility clothing (EN •
471) if risk assessment identifies the need.
Face mask if appropriate. •
DO NOT wear rings, bracelets, watches, jewellery or any other items that •
could be caught in the material and draw you into the chipper.
OPERATOR'S PERSONAL PROTECTIVE EQUIPMENT PPE
BASIC WOODCHIPPING SAFETY
The operator should be aware of the following points:
Maintain a safety exclusion zone around the chipper of at least 10 metres for the general public or employees without •
adequate protection. Use hazard tape to identify this working area and keep it clear from debris build up. Chips should
be ejected away from any area the general public have access to.
Hazardous material - Some species of trees and bushes are poisonous. The chipping action can produce vapour, spray •
and dust that can irritate the skin. This may lead to respiratory problems or even cause serious poisoning. Check the
material to be chipped before you start. Avoid confined spaces and use a face mask if necessary.
Be aware when the chipper is processing material that is an awkward shape. The material can move from side to side •
in the funnel with great force. If the material extends beyond the funnel, the brash may push you to one side causing
danger. Badly twisted brash should be trimmed before being chipped to avoid thrashing in the feed funnel.
Be aware that the chipper can eject chips out of the feed funnel with considerable force. Always wear full head and •
face protection.
Always work on the side of the machine furthest from any local danger, e.g. not road side. •
Never leave the chipper unattended when running. Machines must be supervised at all times when in use. •
In the event of an accident, stop the machine and call the emergency services immediately.•
The chipper will feed material
through on its own. To do this, it
relies on sharp blades on the
chipper rotor. To keep the blades
sharp, only feed the machine with
clean brushwood. DO NOT put
muddy/dirty wood, roots, potted
plants, bricks, stones or metal into
the chipper.
GENERAL SAFETY MATTERS
TW 13/75G
6 / 32
SAFE WORKING
C190-0187 25.01.2019 Rev: 1.0
GENERAL SAFETY MATTERS
Do not operate chipper unless available light is sufficient •
to see clearly.
Do not use or attempt to start the chipper without the •
feed funnel and guards securely in place.
Do not stand directly in front of the feed funnel when •
using the chipper. Stand to one side.
Do not smoke when refuelling. •
Do not let anyone who has not received •
instruction operate the machine.
Do not climb on the machine at any time. •
Do not handle material that is partially •
engaged in the machine.
Do not touch any exposed wiring while the machine is •
running.
Do not use the chipper inside buildings.•
Noise levels above 80dB (A) will be
experienced at the working position.
Prolonged exposure to loud noise may
cause permanent hearing loss. All
persons within a 4 metre radius must
also wear good quality ear protection
(EN 352) at all times to prevent possible
damage to hearing.
Guaranteed Sound
Power: 120dB (A)
As required by Annex III of Directive
2000/14/EC “Noise Emission in the
environment by equipment for use
outdoors”. Tested according to BS EN
ISO 3744:2010.
NOISE TEST
Machine: TW 13/75G
Notes: Tested chipping 40mm x 40mm corsican pine 1.5m in length
DO NOT ALLOW
THE FOLLOWING
TO ENTER THE
MACHINE, AS
DAMAGE IS
LIKELY
BRICKS STRING ROOTS BEDDING
PLANTS
STONES METAL GLASS RUBBER
CLOTH PLASTIC
96.0 dB
92.9 dB
R= 4 metres
R= 10 metres
9
0
.
3
d
B
C
a
l
c
u
l
a
t
e
d
9
0
.
3
d
B
C
a
l
c
u
l
a
t
e
d
9
0
.
3
d
B
C
a
l
c
u
l
a
t
e
d
98.0 dB
103.1 dB
96.2 dB
95.9 dB
TW 13/75G
7 / 32
STORAGE
C190-0187 25.01.2019 Rev: 1.0
STORING THE CHIPPER
Perform the following tasks at the storage intervals indicated, following procedures described within this manual.
Storage time
Maintenance Tasks
<1
month
1-6
months
6-12
months
>12
months
Allow the engine to cool down.
ü ü ü ü
Clean the chipper, removing all woodchips.
ü ü ü ü
Perform routine maintenance.
ü ü ü ü
Check all fasteners and retighten.
ü ü ü ü
Remove all fuel from the tank. NOTE: Either allow the machine to run until all fuel has been used,
or drain from the plug provided. If necessary, siphon the fuel into an approved storage container
(refer to re-fuelling section). Drain prior to moving machinery, to prevent spillage.
ü ü ü ü
Disassemble the spark plug (petrol machines).
ü ü ü ü
Where paint is damaged, touch up paint or treat with a lubricant. NOTE: Original paint colours
are available from Timberwolf dealers.
ü ü ü ü
Store the chipper in a dry place at +5°C to +40°C. NOTE: Timberwolf strongly recommends the
machine is stored in a sheltered location, protected from rain. If the machine is stored outside,
it must be well protected with tarpaulin.
x
ü ü ü
If relative humidity of the storage environment is > 60%, the shaft of the engine must be rotated
by hand 1-2 revolutions bi-weekly. Prior to rotating the shaft, 20 to 30 ml of engine oil should be
poured onto the bearing liner.
x
ü ü ü
Every 3 months, inspect the machine as per <1 month column.
x x
ü ü
Clean out and drain all lubrication lines, including grease pipes, fuel lines and oil reservoirs.
Replace with new lubricants. NOTE: This should be performed at 6 month intervals (months 6 &
12) until recommissioned. Drain prior to moving machinery, to prevent spillage.
x x
ü ü
Keep machine in original container/packaging or equivalent protection and store in a location
free from extremes in temperature, at a min. temp. of +5°C and max. +40°C, humidity and
corrosive environments. NOTE: If the storage location is cold, damp or severe humidity changes
exist, adequate action should be taken to safeguard machinery.
x x x
ü
If machine is exposed to environmental conditions such as humidity during storage, inspect
bearing lubrication system for presence of water. If water is detected in the lubricant, flush out
the bearing housing and re-lubricate immediately.
x x x
ü
All breathers and drains are to be operable while in storage and/or the moisture drain plugs
removed. The machinery must be stored so the drain(s) are at the lowest point, while the
machine is in its stable position.
x x x
ü
Follow the recommissioning process before operation.
x
ü ü ü
NOTE:
Regardless of storage time, all Timberwolf machines must be in a stable, level position to ensure the machine is unable to
roll or move unintentionally during storage.
TW 13/75G
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C190-0187 25.01.2019 Rev: 1.0
IGNITION SWITCH
CHOKE
LEVER
FUEL VALVE
THROTTLE
CONTROL LEVER
Refer to the Honda engine
manual for detailed instructions
of how to start and control the
GX390 engine.
OFF
ON
STARTER
HANDLE
SAFE TRANSPORTATION
The TW 13/75G chipper may be transported as a unit or with the feed funnel removed. •
Take care when loading the TW 13/75G as it is 188 kg in weight. •
Strap the chipper down firmly before beginning a journey (do not use feed funnel handles to •
strap down machine).
Ensure no debris or water is trapped in the rotor housing that may spill during transit. •
Turn the fuel valve OFF and keep the engine upright.•
RECOMMISSIONING AFTER STORAGE
Ensure machine is stable. •
Remove all guards and check all fasteners. If necessary, •
retighten as described within this manual.
Ensure feed funnel is free from foreign objects e.g. tools •
and clothing.
Lower and raise feed funnel into its open and closed •
positions to confirm functionality.
Check fuel within engine and top up accordingly. * •
Inspect all internal parts e.g. drive belts, taper locks and •
shaft keyways.
Check belt tension as described within this manual. •
Inspect cutting blades to confirm they are sharp and •
suitable for use.
Undertake electrical diagnostic continuity check, to •
confirm circuit is complete.
Re-lubricate all grease pipes. Remove pipes and bleed •
the system prior to use, if necessary. *
Follow daily checks before starting, as described within •
this manual.
Start the machine. •
Run for 15 minutes at half throttle, prior to any cutting •
activity, to clear the combustion engine. Once
complete, bring the machine onto full throttle for a
further 5 minutes.
*Storage fluids should be replaced, DO NOT USE old
stagnate fluids.
DELIVERY
All Timberwolf TW 13/75G machines have a full pre - delivery inspection before leaving the factory and are ready to use.
Read and understand this instruction manual before attempting to operate the chipper. In particular, read pages 5-6 which
contain important health and safety information and advice.
MANUAL CONTROLS
There are five controls on the Honda GX 390 K1 that are required for daily usage of the TW 13/75G chipper.
OPERATING INSTRUCTIONS
TW 13/75G
9 / 32
OPERATING INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
STARTING THE ENGINE
Turn the fuel valve to the ‘ON’ position. •
Move the choke lever to the ‘CLOSE’ position. NOTE: Do not use the choke if the engine is warm or the air •
temperature is high.
Move the throttle control lever slightly to the left. •
Turn the ignition switch to the ‘ON’ position. •
Pull the starter handle lightly until resistance is felt, then pull briskly. •
CAUTION: Do not allow the starter handle to snap back against the engine. Return it gently to prevent damage to
the recoil mechanism.
As the engine warms up, gradually move the choke lever to the ‘OPEN’ position. •
Position the throttle control lever for the desired engine speed.•
Should the machine need to be stopped in an emergency, push the red emergency stop button positioned on the funnel.
This stops all power to the engine, bringing the machine to a complete stop. The engine cannot be restarted until the
button is restored to its original position. Before disengaging the emergency stop button, ensure the engine has come to
a complete standstill then inspect the machinery to determine the reason for activation.
EMERGENCY STOPPING
STOPPING THE ENGINE
Move the throttle control lever to idle and allow to run for one minute. •
Turn the fuel valve to the ‘Off’ position. •
Turn the ignition switch to the 'Off' position (as shown in the diagram on page 8). •
Locate the machine on firm level ground. •
Check engine oil level. •
Check the fuel valve is open. •
Check all guards are in place. •
Check the discharge unit is pointing in a safe direction. •
Check the feed funnel to ensure no objects are inside. •
For parts location see diagrams on pages 3 & 4.
DAILY CHECKS BEFORE STARTING
Wood up to 75 mm in diameter can be fed into the feed funnel. Enter it into the funnel butt end first. Release the material
before it engages the rotor. Some pieces of wood may move around significantly whilst being chipped. The wood will be
drawn into the cutting blade quite quickly, be ready for this to happen. Stand well clear.
A piece of wood which is too tough or too large for the chipper will slow the engine down. When this happens it is possible
to hold back the branches that are being chipped and allow the engine to regain its speed again.
If a piece of wood gets stuck in the funnel and it cannot be chipped due to its size or shape, it will need to be removed.
Stop the engine and wait for moving parts to stop before removing the material. Trim the branch until it is a suitable
shape for the chipper to accept.
STARTING TO CHIP
WARNING
DO NOT USE OR
ATTEMPT TO START THE
CHIPPER WITHOUT THE
PROTECTIVE GUARDING
AND DISCHARGE UNIT
SECURELY IN PLACE.
FAILURE TO DO SO MAY
RESULT IN PERSONAL
INJURY OR LOSS OF LIFE.
Check that the chipper is running smoothly. •
Stand to one side of the feed funnel. •
Proceed to feed material into the feed funnel. •
CHIPPING
TW 13/75G
10 / 32
OPERATING INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
BLOCKAGES
Always be aware that what you are putting into the chipper must come
out. If the chips stop coming out of the discharge tube but the chipper
is taking material in STOP IMMEDIATELY. Continuing to feed material
into a blocked machine may cause damage and will make it difficult to
clear. If the chipper becomes blocked, proceed as follows:
Stop the engine, as per instructions on page 9. •
Remove the M12 screw that retains the top rotor housing. •
Open the top rotor housing. •
Wearing gloves, reach into the rotor housing and scoop out the •
debris causing the blockage.
It is not necessary to remove all the debris, just the majority. •
Close the rotor housing and clamp down tightly. •
Restart the engine and increase to full speed. •
Allow chipper time to clear the rotor housing. •
Feed a small piece of wood in to ensure complete clearance. •
If this does not clear it, repeat the process and carefully inspect the discharge tube to find any obstruction. •
NOTE
Continuing to feed the chipper with brushwood once it has become blocked will cause the chipper to compact the chips
in the rotor housing and it will be difficult and time consuming to clear.
AVOID THIS SITUATION - WATCH THE DISCHARGE AT ALL TIMES.
BLADE WEAR
The most important part of using a wood chipper is keeping the cutter blades sharp. Timberwolf chipper blades are
hollow ground to an angle of 40 degrees. When performing daily blade checks ensure blade edge is sharp and free from
chips, if there is any evidence of damage, or the edge is “dull” change the blade(s). The TW 13/75G is fitted with one blade
177 mm (7") long. It is 43 mm wide when new. A new blade should chip for up to 25 hours before it requires sharpening.
This figure will be drastically reduced by feeding the machine with stony, sandy or muddy material.
As the blade becomes blunt, performance is reduced, with increased stress and load on the machine the chips will become
more irregular and stringy. At this point the blade should be sent to a reputable blade sharpening company. The blade
can be sharpened several times in its life. A wear mark on the reverse side indicates the safe limit of blade wear. Replace
when this line is exceeded.
The machine is also fitted with a static blade (anvil). It is important that the anvil is in good condition to allow the cutting
blades to function efficiently. Performance will be poor, even with sharp cutter blades, if the anvil is worn.
REFUELLING
When refuelling, follow standard Health & Safety practices:
Stop the engine and allow it to cool before refuelling. •
Never smoke or allow naked flames nearby while refuelling. •
Store fuel away from vapour ignition sources such as fires and people smoking. •
Never refuel at operating location, keep a distance of > 10 m to avoid creating fire hazards. •
Fuel storage containers must be approved for appropriate fuel storage and clearly labelled with securely fitting caps. •
Clean the area around the fuel cap and use a funnel for refuelling. Replace the fuel cap securely. Do not fill the tank •
beyond the maximum fill indicator.
Avoid skin contact with fuel. If it gets into eyes wash out with sterile water immediately and seek medical advice as •
soon as possible.
Always clean spillages quickly and change clothes before re-entering the work area if fuel is spilled onto garments.•
WARNING
DO NOT REACH INTO THE
ROTOR HOUSING WITH
UNPROTECTED HANDS.
THERE ARE SHARP
BLADES AND ANY SMALL
MOVEMENT OF THE
ROTOR MAY CAUSE
SERIOUS INJURY.
TW 13/75G
11 / 32
OPERATING INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
THE FOLLOWING PAGES DETAIL ONLY BASIC
MAINTENANCE GUIDELINES SPECIFIC TO YOUR CHIPPER.
THIS IS NOT A WORKSHOP MANUAL.
The following guidelines are not exhaustive and do not extend to generally accepted standards of
engineering/mechanical maintenance that should be applied to any piece of mechanical equipment and the chassis
to which it is mounted.
Authorised Timberwolf service agents are fully trained in all aspects of total service and maintenance of Timberwolf
wood chippers. You are strongly advised to take your chipper to an authorised agent for all but the most routine
maintenance and checks.
Timberwolf accepts no responsibility for the failure of the owner/user of Timberwolf chippers to recognise generally
accepted standards of engineering/mechanical maintenance and apply them throughout the machine.
The failure to apply generally accepted standards of maintenance, or the performance of inappropriate maintenance
or modifications, may invalidate warranty and/or regulatory compliance, in whole or in part.
Please refer to your authorised Timberwolf service agent for service and maintenance.
Problem Cause Solution Caution - Always ensure appropriate PPE is worn.
Wood chip
ejection
stopped /
limited
Obstructed
discharge
Clear debris from discharge chute. Ensure machine is off.
Loose drive belts Refer to manual & tension belts guidelines. Ensure machine is off .
Broken rotor
paddles
Inspect paddles, replace broken / missing
paddle.
Ensure machine is off. Call engineer for
repair.
Rotor does
not turn
Obstructed
discharge
Clear debris from discharge chute. Ensure machine is off
Rotor jammed
Inspect & clear infeed funnel and rotor
housing.
Ensure machine is off
Drive belt issue
Inspect drive belts, replace if required.
Refer to manual & tension belts guidelines.
Ensure machine is off
Slow or not
feeding
Low engine speed
Check & inspect throttle and cable. Check
throttle is set to specified speed.
Ensure machine is off
Blades dull Rotate, sharpen or replace blades. Ensure machine is off
Anvils dull
Check anvil has sharp edge, rotate, sharpen
or replace if necessary.
Ensure machine is off
Obstructed
discharge
Clear debris from discharge chute. Ensure machine is off
TROUBLESHOOTING
This table is a troubleshooting guide to common problems.
If your problem is not listed below, or is unresolved after following the guide, please contact your Timberwolf service agent,
whose Timberwolf trained engineers can perform further fault finding. Before you call, please have this operating manual
and the machine serial number ready.
TW 13/75G
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SERVICE INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
SERVICE SCHEDULE
WARNING
ALWAYS IMMOBILISE THE MACHINE BY STOPPING THE ENGINE BEFORE
UNDERTAKING ANY MAINTENANCE WORK.
SERVICE SCHEDULE
Daily
Check
25
Hours
50
Hours
500
Hours
Check engine oil - top up if necessary (10W-30).
ü
Check for engine oil leaks.
ü
Check fuel level.
ü
Check feed funnel and belt guard are securely fitted.
ü
Clean engine air intake.
ü
Check air filter element.
ü
Check blade condition.
ü
Check for tightness all nuts, bolts and fastenings making sure
nothing has worked loose.
ü
Check tension of main drive belts (and tension if necessary).
ü
Check cutting anvil for wear.
ü
Grease front rotor bearing.
ü
Check for loose electrical wiring.
ü
Renew oil filter.
REFER TO YOUR ENGINE SUPPLIERS MANUAL
Replace spark plugs.
Check valve clearance.
Clean air filter.
Clean sediment cup.
Clean fuel tank and strainer.
Check fuel line.
Replace anvil when worn. RETURN TO DEALER FOR ANVIL CHANGE
CHECK FITTINGS
The Timberwolf TW13/75G is subject to large vibrations during the normal course of operation. Consequently there is
always a possibility that nuts and bolts will work themselves loose. It is important that periodic checks are made to ensure
the security of all fasteners. Fasteners should be tightened using a torque wrench to the required torque (see below).
Uncalibrated torque wrenches can be inaccurate by as much as 25%. It is therefore essential that a calibrated torque
wrench is used to achieve the tightening torques listed below.
Size Pitch Head Torque Ibft Torque Nm
Blade Bolts M8 Standard T40 Torq 22 30
General M6 Standard 10 mm Hex 10 14
General M8 Standard 13 mm Hex 20 27
General M10 Standard 17 mm Hex 45 61
General M12 Standard 19 mm Hex 65 88
TW 13/75G
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SERVICE INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
SPARES
Only fit genuine Timberwolf replacement blades, screws and
chipper spares. Failure to do so will result in the invalidation of
the warranty and may result in damage to the chipper, personal
injury or even loss of life.
SAFE LIFTING OF THE CHIPPER
The lifting eye is designed to lift the machine’s weight only. Do
not use hoist hook directly on the lifting eye, use a correctly rated
safety shackle. Inspect the lifting eye prior to each use - DO NOT
USE LIFTING EYE IF DAMAGED. Maximum lift weight is
200kg, as
indicated on the machine.
SAFE MAINTENANCE
Handle blades with extreme caution to avoid injury. Gloves •
should always be worn when handling the cutter blades.
The drive belts should be connected while changing blades, •
as this will restrict sudden movement of the rotor.
The major components of this machine are heavy. Lifting •
equipment must be used for disassembly.
Clean machines are safer and easier to service. •
Avoid contact with hazardous materials.•
WARNING
ALWAYS IMMOBILISE THE ENGINE
BEFORE UNDERTAKING ANY
MAINTENANCE WORK ON THE CHIPPER.
ENSURE THE CHIPPER IS STABLE BEFORE
PERFORMING ANY MAINTENANCE.
TW 13/75G
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SERVICE INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
HAZARDOUS MATERIALS & END OF MACHINE LIFE
During Machine Life
The following hazardous materials are supplied within Timberwolf machines:
Engine oil •
Battery acid •
Petrol •
Copper Ease •
MATERIAL SAFETY DATA SHEETS FOR HAZARDOUS MATERIALS SUPPLIED WITHIN TIMBERWOLF
MACHINES ARE AVAILABLE ON REQUEST. REFER TO THESE FOR FIRST AID AND FIRE PROTECTION
MEASURES.
Always follow recommended procedures for safe handling, removal and disposal of hazardous materials. Safety precautions
should be taken when handling hazardous materials (use of oil-resistant gloves and saftey glasses are recommended respiratory protection is not required). Avoid direct contact with the substance and store in a cool, well ventilated area
avoiding sources of ignition, strong oxidising agents and strong acids. Ensure hazardous spillages do not flow into the
ground or drainage system and ensure potential environmental damage is controlled safely, according to local laws.
End of Machine Life
Follow these guidelines using approved local waste and disposal agencies for recycled materials, according to applicable
Health, Safety and Environmental laws.
Position the machine within reach of all necessary lifting equipment. •
Use tools and PPE detailed within maintenance instructions. •
Remove all hazardous materials and store safely before disposal. •
Disassemble the machine structure, referring to the maintenance instructions. Pay attention to parts with mechanical •
pressure or tension applied, including springs.
Separate items that continue to have a service life. •
Separate worn items into material groups and where possible, recycle using available agencies for recycled materials. •
Common types are:
If a part is not easily separated into different material groups, it must be added to “general discarded materials”. •
Do not burn discarded materials. •
Change the machinery records to show that the machine is out of service and discarded. Supply this serial number to •
Timberwolf to close their records.
Steel
Non-ferrous metals
Aluminium
Brass
Copper
Plastic materials
Rubber
Electrical and Electronic Components
Other materials that can be recycled
Other materials that cannot be recycled
TW 13/75G
15 / 32
SERVICE INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
Turn engine off, as per instructions on page 9. 1
Pull the plug cap from the spark plug. 2
Remove the M12 screw that retains the top rotor housing 3
using a 19 mm spanner.
Turn the rotor by hand using the fan blades so that holes 4
(4) are aligned and insert the Rotor Retaining Pin
(supplied in tool kit).
Use a small screw driver to clean out the star socket 5
screw heads retaining the blade.
Undo blade screws using the star socket provided. 6
Before fitting replacement blades ensure the blade seat 7
is clean. No material should be allowed to sit between
the blade and the rotor.
Check screws being replaced are not damaged. If so, 8
these should be renewed.
Apply a thin layer of copper grease to the entire screw 9
thread.
Retighten the screws to 30Nm (22lb/ft). This torque 10
setting is vitally important to ensure your bolts come out
at a later date. Timberwolf recommend you purchase a
torque wrench for this and other jobs on the chipper.
Remove Rotor Retaining Pin. 11
Close rotor housing and replace retaining screw. 12
Refit spark plug cap to spark plug.13
CHANGE BLADES
WARNING
WEAR RIGGERS GLOVES FOR THE BLADE
CHANGING OPERATION.
WARNING
ALWAYS SHARPEN BLADES ON A REGULAR BASIS. FAILURE TO DO SO
WILL CAUSE THE MACHINE TO UNDER PERFORM AND WILL OVERLOAD
ENGINE AND BEARINGS CAUSING MACHINE BREAKDOWN. BLADES
MUST NOT BE SHARPENED BEYOND THE WEAR MARK SEE DIAGRAM.
FAILURE TO COMPLY WITH THIS COULD RESULT IN MACHINE DAMAGE,
INJURY OR LOSS OF LIFE.
WEAR MARK
4
10
3
2
Rotor
Retaining Pin
GREASING ROTOR BEARINGS
Remove rubber cap from front bearing housing grease nipple. 1
Apply 1 pump of grease to bearing. 2
Replace cap.3
The anvil is an important component in maintaining a consistent machine
performance. Inspect it through an open rotor housing. A measure of the
wear is how sharp the edge is. If it has become seriously rounded then it is
appropriate to change it.
Turning or replacing the anvil should be carried out by a Timberwolf dealer.
ANVIL CHANGING
TW 13/75G
16 / 32
SERVICE INSTRUCTIONS
C190-0187 25.01.2019 Rev: 1.0
TENSION DRIVE BELTS
Remove the belt guard. 1
Insert a piece of wood approximately 25mm x 150mm x 1200mm (1"x 2
6"x 48") in the gap as shown.
Loosen the four Nyloc nuts located behind the engine. 3
With the chipper firmly supported, use the piece of wood to lever the 4
rotor housing upwards.
For instructions on checking belt tension & correct belt tension values, 5
please refer to the Timberwolf V-Belt Tensioning Data Table (pg 23).
As the belts become taught, retighten the four Nyloc nuts. 6
Replace the belt guard. 7
Remove the piece of wood. 8
NOTE: Slack drive belts will cause poor performance and excess belt and
pulley wear.
NOTE: There will normally be a rapid drop in tension during run-in period
for new belts. When new belts are fitted, check the tension every 2 - 3
hours and adjust until the tension remains constant. Belt failures due to
lack of correct tensioning will not be covered under your Timberwolf
warranty.
2
3
4
ENGINE SERVICING
All engine servicing must be performed in accordance with the Engine
Manufacturer’s handbook provided with the machine. Failure to adhere to
this may invalidate warranty and/or shorten the life of the engine.
2
1
TW 13/75G
17 / 32
WARRANTY STATEMENT
C190-0187 25.01.2019 Rev: 1.0
TIMBERWOLF NONONSENSE WARRANTY
All new Timberwolf machines come with peace of mind built in. Our no-nonsense warranty is your guarantee of your
Timberwolf wood chipper not letting you down.
Your warranty statement is included in your manual pack. Please ensure you register your machine with your dealer to
ensure you are eligible for the full Timberwolf warranty period.
TW 13/75G
18 / 32
DECLARATION OF CONFORMITY
C190-0187 25.01.2019 Rev: 1.0
TW 13/75G
19 / 32
IDENTIFICATION PLATE
C190-0187 25.01.2019 Rev: 1.0
EXAMPLE
TW 13/75G
20 / 32
DECALS
C190-0187 25.01.2019 Rev: 1.0
Warning.
Hot exhaust.
Danger
Beware of sharp blades when the
rotor housing is open.
Warning.
High velocity discharge -
keep clear.
Lifting eye is designed to lift the
machine’s weight only. Do not
use hoist hook on lifting eye. Use
correctly rated safety shackle
only through lifting eye. Lifting
eye to be inspected every 6
months or before each use.
Always visually inspect lifting eye
prior to each use. Do not use
lifting eye if damaged.
Personal Protective
Equipment required.
See Page 5.
Clean under blades before
refitting or turning.
Failure to do so may result in
blade(s) coming loose and
damage being caused to the rotor
housing.
The instruction manual with
this machine contains
important operating,
maintenance and health and
safety information. Failure
to follow the information
contained in the instruction
manual may lead to death or
serious injury.
New drive belts need
re-tensioning.
When new belts are fitted check
tension every 2-3 hours & adjust
until tension remains constant.
Danger.
Rotating blades.
Keep hands and feet out.
Place tie-down straps here only.
75mm Maximum Diameter
Danger.
Do not operate without this cover
in place.
Decal Descripon
Decal Descripon
616
617
670
1662
4099
17294
2944
2949
3022
18393
17290
P637 x 3
TW 13/75G
21 / 32
DECALS
C190-0187 25.01.2019 Rev: 1.0
Caution.
Do not put road sweepings in
machine as grit will damage
blades.
Danger.
Rotating blades inside. Stop
engine and remove spark plug
cap before removing discharge
unit.
Caution.
Avoid standing directly in front of
feed funnel to reduce exposure
to noise, dust and risk from
ejected particles.
Danger.
Do not use this machine without
the discharge unit fitted. Failure
to comply may result in serious
inury or damage.
Fuel Here.
Risk of fire. Allow engine to cool
for 1 minute before refuelling.
Use unleaded petrol.
P637
P652
18322
P1300
Decal Descripon
Decal Descripon
LWA
120
db
92
dB
L
Aeq
2
0
0
K
G
M
A
X
TIMBERWOLF
TW 13/75G
1363 1522 3004 2948 P*155 x 2
P651
17862 x 2
22 / 32
CIRCUIT DIAGRAM
TW 13/75G
C190-0187 25.01.2019 Rev: 1.0
TW 13/75G
23 / 32
V-BELT TENSIONING TABLE
C190-0187 25.01.2019 Rev: 1.0
METHOD:
Set the deflection distance on the lower scale of the tension gauge so that the underside of the 'o'-ring equals the 1
'h' value given in the table.
Ensure that the deflection force scale is zero'd by pushing the upper 'o'-ring all the way down. 2
Place the tension gauge in the centre of the belt span as shown in the diagram. 3
Press downwards on the rubber buffer, deflecting the belt until the underside of the lower 'o'-ring is level with 4
the belt behind (use a straight edge if there is only 1 belt).
Take the reading from the deflection scale of the tension meter (read at the lower edge of the 'o'-ring) & compare 5
this value with that given in the table.
Tighten or loosen belts as required following procedure given in this operator's manual. 6
Tension gauges are available from Timberwolf spares, quong part no. 18091
TIPS ON BELT TIGHTENING:
There will normally be a rapid drop in tension during •
the run-in period for new belts. When new belts are
fitted, check the tension every 2-3 hours & adjust until
the tension remains constant.
The best tension for V-belt drives is the lowest tension •
at which the belts do not slip or ratchet under the
highest load condition.
Too much tension shortens belt & bearing life. •
Too little tension will affect the performance of your •
machine especially in respect of no-stress devices.
Ensure that belt drives are kept free of any foreign •
materials.
If a belt slips - tighten it! •
Rotor Pulley
Engine Pulley
TW 13/75G Rotor Belts
Belt Mffr / Type Gates Super HC-MN
Belt Pitch Designaon SPA
Belt Length in mm 900
Belt Deflecon in mm = h 1.9
Force Reading (Kg)
New belt 1.4 - 1.5
Used Belt 1.2 - 1.3
24 / 32
WARRANTY SERVICE CHECK RECORD
TW 13/75G
C190-0187 25.01.2019 Rev: 1.0
Model number: Serial number:
Date of delivery/
handover:
Opons/extras:
Dealer pre
delivery check:
Inspected by:
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
50 HOUR WARRANTY SERVICE CHECK
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
11 MONTH WARRANTY SERVICE CHECK
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
23 MONTH WARRANTY SERVICE CHECK
25 / 32
SERVICE RECORD
C190-0187 25.01.2019 Rev: 1.0
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
Date:
Hours:
Invoice number:
Signature:
Next service due:
Authorised dealer stamp
TW 13/75G
C190-0187 25.01.2019 Rev: 1.0
PARTS LIST
THE FOLLOWING ILLUSTRATIONS ARE FOR PARTS IDENTIFICATION ONLY. THE REMOVAL OR FITTING
OF THESE PARTS MAY CAUSE A HAZARD AND SHOULD ONLY BE CARRIED OUT BY TRAINED PERSONNEL.
PARTS LISTS
26 / 32
Page No.
CHASSIS / ROTOR HOUSING 27
ENGINE 28
FUNNEL 29
ROTOR 30
DECALS 31
TW 13/75G
TW 13/75G
27 / 32
C190-0186 29.01.2019 Rev: 1.0
28 / 32
C190-0186 29.01.2019 Rev: 1.0
TW 13/75G
TW 13/75G
29 / 32
C190-0186 29.01.2019 Rev: 1.0
30 / 32
C190-0186 29.01.2019 Rev: 1.0
TW 13/75G
31 / 32
C190-0186 29.01.2019 Rev: 1.0
TW 13/75G
670
2944
2949
P637
P652
1363
17290
18393
18322
SUPPLIED WITH
ENGINE MANUAL
P155
2
0
0
K
G
M
A
X
P655
616
P651
17862
TIMBERWOLF
TW 13/75G
1662
2948
HOT MUFFLER CAN
BURN YOU
CAUTION
!
32 / 32
C190-0186 29.01.2019 Rev: 1.0
TW 13/75G
1522
3022
3004
P155
P637
P1300
4099
17294
TIMBERWOLF
TW 13/75G
17862
617
LWA
120
db
92
dB
L
Aeq
P637
timberwolf-uk.com
Timberwolf Ltd Wood Chippers & Shredders
Tomo Industrial Estate, Stowmarket, Suffolk IP14 5AY, United Kingdom
T: +44 1449 765800 E: info@timberwolf-uk.com W: timberwolf-uk.com
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