Spearhead MULTICUT 430 User manual

Spearhead Multicut 430
0
MULTICUT 430
Edition 1.1 –March 2016
Part No: 8999079

Spearhead Multicut 430
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IMPORTANT
VERIFICATION OF WARRANTY REGISTRATION
DEALER WARRANTY INFORMATION & REGISTRATION VERIFICATION
It is imperative that the selling dealer registers this machine with Spearhead Machinery Limited
before delivery to the end user –failure to do so may affect the validity of the machine warranty.
To register machines go to the Spearhead Machinery Limited web site at
www.spearheadmachinery.com, log onto ‘Dealer Inside’ and select the ‘Machine Registration button’
which can be found in the Service Section of the site. Confirm to the customer that the machine has
been registered in the section below.
Should you experience any problems registering a machine in this manner please contact the
Spearhead Service Department on 01789 491867.
Registration Verification
Dealer Name:
……………………..…………………………………………………………….
Dealer Address:
…….………………………………………………………………………….
Customer Name:
……………………..…………………………………………………………
Date of Warranty Registration:
……/……/...…… Dealer Signature: ………………..……
NOTE TO CUSTOMER / OWNER
Please ensure that the above section has been completed and signed by the selling dealer to verify
that your machine has been registered with Spearhead Machinery Limited.
IMPORTANT: During the initial ‘bedding in’ period of a new machine it is the customer’s
responsibility to regularly inspect all nuts, bolts and hose connections for tightness and re-tighten if
required. New hydraulic connections occasionally weep small amounts of oil as the seals and joints
settle in –where this occurs it can be cured by re-tightening the connection –refer to torque
settings chart below. The tasks stated above should be performed on an hourly basis during the
first day of work and at least daily thereafter as part of the machines general maintenance
procedure.
CAUTION: DO NOT OVER TORQUE HYDRAULIC FITTINGS AND HOSES
TORQUE SETTINGS FOR HYDRAULIC FITTINGS
HYDRAULIC HOSE ENDS
PORT ADAPTORS WITH BONDED SEALS
BSP
Setting
Metric
BSP
Setting
Metric
1/4”
18 Nm
19 mm
1/4”
34 Nm
19 mm
3/8”
31 Nm
22 mm
3/8”
47 Nm
22 mm
1/2”
49 Nm
27 mm
1/2”
102 Nm
27 mm
5/8”
60 Nm
30 mm
5/8”
122 Nm
30 mm
3/4”
80 Nm
32 mm
3/4”
149 Nm
32 mm
1”
125 Nm
41 mm
1”
203 Nm
41 mm
1.1/4”
190 Nm
50 mm
1.1/4”
305 Nm
50 mm
1.1/2”
250 Nm
55 mm
1.1/2”
305 Nm
55 mm
2”
420 Nm
70 mm
2”
400 Nm
70 mm

Spearhead Multicut 430
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WARRANTY POLICY
WARRANTY REGISTRATION
All machines must be registered, by the selling dealer with Spearhead Machinery Ltd,
before delivery to the end user. On receipt of the goods it is the buyer’s responsibility
to check that the Verification of Warranty Registration in the Operator’s Manual has
been completed by the selling dealer.
1. LIMITED WARRANTIES
1.01. All machines supplied by Spearhead Machinery Limited are warranted to be free from defects in
material and workmanship from the date of sale to the original purchaser for a period of 12
months, unless a different period is specified.
1.02. All spare parts supplied by Spearhead Machinery Limited are warranted to be free from defects in
material and workmanship from the date of sale to the original purchaser for a period of 6
months.
1.03. The manufacturer will replace or repair for the purchaser any part or parts found, upon
examination at its factory, to be defective under normal use and service due to defects in material
or workmanship. Returned parts must be complete and unexamined.
1.04. This warranty does not apply to any part of the goods, which has been subjected to improper or
abnormal use, negligence, alteration, modification, fitment of non-genuine parts, accident
damage, or damage resulting from contact with overhead power lines, damage caused by foreign
objects (e.g. stones, iron, material other than vegetation), failure due to lack of maintenance, use
of incorrect oil or lubricants, contamination of the oil, or which has served its normal life. This
warranty does not apply to any expendable items such as blades, flails, bushes, belts, flap kits,
skids, shields, guards, wear pads or pneumatic tyres.
1.05. Temporary repairs and consequential loss - i.e. oil, downtime and associated parts are
specifically excluded from the warranty.
1.06. Warranty on hoses is limited to 12 months and does not include hoses which have suffered
external damage. Only complete hoses may be returned under warranty, any which have been
cut or repaired will be rejected.
1.07. Machines must be repaired immediately a problem arises. Continued use of the machine after a
problem has occurred can result in further component failures, for which Spearhead Machinery
Ltd cannot be held liable, and may have safety implications.
1.08. Except as provided herein, no employee, agent, dealer or other person is authorised to give any
warranties of any nature on behalf of Spearhead Machinery Ltd.
1.09. For machine warranty periods in excess of 12 months the following additional exclusions shall
apply:
1.09.1. Hoses, external seals, exposed pipes and hydraulic tank breathers.
1.09.2. Filters
1.09.3. Rubber mountings
1.09.4. External electric wiring.
1.09.5. Labour and mileage costs.
1.10. All service work, particularly filter changes, must be carried out in accordance with the
manufacturer’s service schedule. Failure to comply will invalidate the warranty. In the event of a
claim, proof of the service work being carried out may be required.
NB Warranty cover will be invalid if any non-genuine parts have been fitted or used. Use of non-genuine
parts may seriously affect the machine’s performance and safety. Spearhead Machinery Ltd cannot be
held responsible for any failures or safety implications that arise due to the use of non-genuine parts.

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2. REMEDIES AND PROCEDURES
2.01. The warranty is not effective unless the Selling Dealer registers the machine, via the Spearhead
Machinery web site and confirms the registration to the purchaser by completing the confirmation
form in the operator’s manual.
2.02. Any fault must be reported to an authorised Spearhead Machinery dealer as soon as it occurs.
Continued use of a machine, after a fault has occurred, can result in further component failure for
which Spearhead Machinery Ltd cannot be held liable.
2.03. Repairs should be undertaken within two days of the failure. Claims submitted for repairs
undertaken more than 2 weeks after a failure has occurred, or 2 days after the parts were
supplied will be rejected, unless the delay has been authorised by Spearhead Machinery Ltd.
2.04. All claims must be submitted, by an authorised Spearhead Machinery Service Dealer, within 30
days of the date of repair.
2.05. Following examination of the claim and parts the manufacturer will pay, at their discretion, for any
valid claim the cost of any parts and an appropriate labour allowance if applicable.
2.06. The submission of a claim is not a guarantee of payment.
2.07. Any decision reached by Spearhead Machinery Ltd is final.
3. LIMITATION OF LIABILITY
3.01. The manufacturer disclaims any express (except as set forth herein) and implied warranties with
respect to the goods including, but not limited to, merchantability and fitness for a particular
purpose.
3.02. The manufacturer makes no warranty as to the design, capability, capacity or suitability for use of
the goods.
3.03. Except as provided herein, the manufacturer shall have no liability or responsibility to the
purchaser or any other person or entity with respect to any liability, loss, or damage caused or
alleged to be caused directly or indirectly by the goods including, but not limited to, any indirect,
special, consequential, or incidental damages resulting from the use or operation of the goods or
any breach of this warranty. Notwithstanding the above limitations and warranties, the
manufacturer’s liability hereunder for damages incurred by the purchaser or others shall not
exceed the price of the goods.
3.04. No action arising out of any claimed breach of this warranty or transactions under this warranty
may be brought more than one (1) year after the cause of the action has occurred.
4. MISCELLANEOUS
4.01. The manufacturer may waive compliance with any of the terms of this limited warranty, but no
waiver of any terms shall be deemed to be a waiver of any other term.
4.02. If any provision of this limited warranty shall violate any applicable law and is held to be
unenforceable, then the invalidity of such provision shall not invalidate any other provisions
herein.
4.03. Applicable law may provide rights and benefits to the purchaser in addition to those provided
herein.

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CE Declaration of Conformity,
Conforming to EU Machinery Directive
2006/42/EC
We, Spearhead Machinery Ltd, Green View, Salford Priors, Evesham,
Worcestershire, WR11 8SW hereby declare that:
Product ……………………………………………..…………………………
Product Code……………………………………………..…………………………
Serial No……………………………………………..……..………………….
Type……………………………………………..…………………………
Manufactured by: Alamo Manufacturing Services (UK) Limited, Station Road,
Salford Priors, Evesham, Worcestershire, WR11 8SW
Complies with the required provisions of the Machinery Directive 2006/42/EC. The
Machinery Directive is supported by the following harmonized standards:
BS EN ISO 14121-1 (2007) Safety of Machinery –Risk Assessment, Part 1:
Principles Part 2: Practical Guide and Examples of Methods.
BS EN ISO 12100-1 (2010) Safety of Machinery –Part 1: Basic Terminology
and Methodology Part 2: Technical Principles.
BS EN 349 (1993) + A1 (2008) Safety of Machinery –Minimum Distances to
avoid the Entrapment of Human Body Parts.
BS EN 953 (1998) Safety of Machinery –Guards General Requirements for
the Design and Construction of Fixed and Movable Guards.
BS EN 982 (1996) + A1 (2008) Safety Requirements for Fluid Power Systems
and their Components. Hydraulics.
The EC Declaration only applies if the machine stated above is used in accordance
with the operating instructions.
Signed
(On behalf of Spearhead Machinery Ltd)
Status General Manager
Date ………………………………………………

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Contents
Contents 5
Safety 6
Recommendations 7
Introduction 9
Tractor Requirements 9
Attaching to the Tractor 9
Setting up your Machine 11
Operation 12
Transportation 13
Machine protection 14
Servicing & Maintenance
Safety First 15
Daily 16
Every 8 Hours 17
Torque Settings 17
Regularly 18
Blades 18
Slip Clutch Settings 19
Storage 20
Trouble Shooting Guide 21

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Safety
Warning
Avoid fluid escaping
under pressure. Consult
technical manual for
services procedures.
Warning
Danger –flying objects
keep safe distance from
the machine as long as
the engine is running.
Warning
Stay clear of mower blade
as long as engine is
running.
Warning
Stay clear of swinging
area of implements.
Warning
Shut off engine and remove
key before performing
maintenance or repair work.
Warning
Check all nuts are tight
every 8 hours.
Warning
Carefully read operator’s
manual before handling this
machine. Observe
instructions and safety rules
when operating.

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Recommendations
Beware of the following Potential Dangers associated with the use of
this machine:
Becoming trapped when hitching or unhitching
Machine overbalancing when wing is raised.
Getting caught on rotating power take off (PTO)
Being hit or caught by any moving part, e.g. Blades, drive shaft and wings.
Being hit by flying debris or machine parts due to machine damage
Machine overbalancing when not in use
Injection of high pressure oil from damaged couplings or hydraulic hoses
Accidents due to collision with other machines, or debris left on road
Beware of free-swinging blades over centering and falling when wings are
folding.
ALWAYS:
Ensure the operator has read this handbook and has been trained to use the
machine.
Ensure all safety guards are in place and all tractor windows closed.
Before leaving the tractor cab always ensure that the wings are firmly on the
ground, no weight is on the machine’s hydraulics and the rotor has stopped
spinning.
Check that all guards are properly fitted and there are no damaged or loose
parts. Particular attention should be given to the blades to ensure they are not
damaged, cracked or missing.
Inspect work area for wire, steel posts, large stones and other dangerous
materials and remove before starting work.
Ensure that all warning labels are always visible and that they are not
damaged, defaced or missing.
Fit transport strap to wings before transport and before unhitching when
applicable.
Wear ear defenders if operating without a quiet cab or with the cab windows
open
Ensure tractor guards are fitted correctly and are undamaged
Work at a safe speed, taking into account terrain and obstacles
Ensure that the tractor meets the minimum recommendations of the machine
manufacturer
Check that machine fittings and couplings are in good condition
Follow the manufacturer’s instructions for attachment and removal of machine
from the tractor
Ensure blades are of the type recommended by the manufacturer, are
securely fitted and are undamaged
Ensure hydraulic pipes are correctly routed to avoid damage from chafing,
stretching, pinching or kinking.
Check condition of tyres.
Ensure all blades have stopped spinning before folding wings into transport
position.

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Disengage the machine, stop the engine and remove the key before leaving
the tractor cab for any reason
Clean up any debris left at the work site.
Ensure that when you remove the machine from the tractor it is secured in a
safe position using feet mounted at the front of the machine, on level concrete
base.
NEVER:
Never operate the machine with other people present, as it is possible for
debris, including stones, to be discharged from the front and rear.
Never operate the machine until you have read and understood this
handbook and are familiar with the controls.
Never use a machine that is poorly maintained or has guards that are
damaged or missing
Never allow an inexperienced person to operate the machine without
supervision.
Never use or fit a machine onto a tractor if it doesn’t meet the
manufacturer’s specification.
Never use a machine if the hydraulic system shows signs of damage.
Never attempt to detect a hydraulic leak with your hand, use a piece of
card.
Never allow children to play on or around the machine at any time.
Never attempt any maintenance or adjustment without first disengaging
the PTO, lowering the wings to the ground, stopping the tractor engine
and applying the tractor parking brake.
Never leave the cab without removing the ignition key.
Never operate the tractor or any controls from any position other than
from the driving seat.
Never stop the engine with the PTO engaged.
Never operate with blades missing.
Never operate PTO above recommended speed, 1000 r.p.m.
Never operate with wire around the rotor. Stop immediately.
Never use the wing raised which may throw debris towards the cab.
Never attempt to use the machine for any purpose other than that it was
designed for.
Never transport with the PTO engaged.
Never enter the working area of the machine (risk of injury!).
Never engage the P.T.O with wings folded.

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Introduction
The Spearhead 430is a heavy-duty rotary mower for a set-aside, stubble and
pasture topping. By carefully following the instructions in this handbook, the 430will
give many years of trouble free operation.
Safety First
Never start using the machine until the handbook has been read and understood.
The 430rotary mower is a potentially lethal machine if used incorrectly and it is
essential that the operator fully understand the working before starting up.
Tractor Requirements
Spearhead recommend tractors of between 70 and 120hp.
Category 2 three-point linkage.
Stabilisers or check chains must be in good working order to hold the
machine firmly. Do not operate without ensuring the check chains or
stabilisers are tight. Spearhead particularly recommend “turnbuckle” type
check chains.
Set tractor lift rods of equal length.
Before hitching, ensure position control is selected. Do not attempt to hitch in
draft control.
Ensure there is sufficient weight on front wheels of the tractor for safe
transport and stability. The tractor should have a minimum weight of 3700 kg.
The tractor should have a 1000rpm P.T.O.
One external hydraulic service required, single acting with float facility for
wings.
Attaching To The Tractor
Fit the machine to the tractor in the standard way, ensuring the correct match of
linkage (category 2). Check that the top link is in good order and the threads are well
lubricated. Use stabilisers to eliminate any sideways sway.
Before lifting the machine with the tractor linkage you should ensure there is
sufficient front weight to keep the front wheels in contact with ground. This is most
important for safe transport and stability when turning on sloping ground.
It is essential to ensure that the tractor drawbar cannot foul the P.T.O. shaft, we
advise to remove it altogether if there is any doubt.
Before fitting the PTO for the first time, it may be necessary to adjust the length.
There should be maximum engagement of the sliding tubes without bottoming at the
shortest operation position. To check, first connect the mower to the tractor. Pull the
PTO shaft apart and connect to the tractor PTO output shaft and the gearbox input
shaft. Hold the half shafts next to each other in the shortest working position. If
necessary, shorten the inner and outer guard tubes equally (Fig. 1). Shorten the
inner and outer sliding profiles by the same length as the guard tubes. File all sharp
edges and remove burrs. Grease sliding profiles.

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Before fitting the PTO, first clean and grease. Remove the clamp bolts on the yoke
and slide onto the machine gearbox, refit the bolts into the grove tighten 150Nm. Pull
back the PTO release ring and slide onto tractor stub shaft until it engages.
The PTO shaft is fitted with a non-rotating safety guard. It should be secured to the
machine and tractor with the two retaining chains provided.
Connect the hydraulic hose, to a single acting service, with a dump facility. This is
important so the wings can follow the ground contours in work.
Connect the top link and adjust to ensure there is some slack in the wire ropes,
before raising the machine.

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Setting Up Your Machine
Height
To alter the height of cut; raise the machine so the wheels are clear of the ground,
remove pin a (Fig. 3) adjust the wheel arm, replace pin a (Fig 3) and gently lower the
machine until the wheel contacts the ground. Now adjust the height of the tractor link
arms so the front of the mower is 25mm (1”) higher at the front c.
The top link must be adjusted to ensure the wire ropes are slack, so the machine can
follow undulating ground fore and aft, but still allow the machine to lift when the
tractor link arms are fully raised.
Standard Wheels:
Wheel Arm –Position 1: Wheel Arm –Position 2:
A+C = 25mm A+C = -85mm
F+H = 70mm F+H = -20mm
B+D = 115mm B+D = 20mm
G+I = 180mm G+I = 90mm
C+E = 220mm C+E = 130mm
H = 290mm H = 205mm
Wide Wheels:
Wheel Arm –Position 1: Wheel Arm –Position 2:
A+C = 75mm A+C = 25mm
F+H = 130mm F+H = 70mm
B+D = 180mm B+D = 115mm
G+I = 240mm G+I = 180mm
C+E = 280mm C+E = 220mm
H = 350mm H = 290mm
Cutting height
adjustment a
Ensure front of
machine is 25mm
(1”) higher than rear
Fig 3

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Wings
Unfolding the wings if the machine is in the transport position, first pressurise
hydraulic rams before releasing locking strap (Fig 4), lower both wings by releasing
hydraulic pressure, leaving tractor spool in float position (Fig, 5).
Operation
Once ready for work with the wings unfolded, raise the mower clear of the ground
and slowly engage the PTO with the tractor engine at low revs to prevent shock
damage to the machine. Slowly increase the engine revs to achieve the
recommended PTO speed of 1000r.p.m. As indicated by the decal on top of the
centre guard and not the number of splines on the P.T.O shaft. Lower the machine
onto the ground, select a sensible forward speed bearing in mind the density of
growth, the terrain, the available horsepower and proceed. If at any time serious
vibration occurs, stop the engine immediately and check the blades, following all
safety precautions.
The quality of finish is determined by the forward speed, i.e. a slow speed will
produce a high quality of cut, where as faster forward speeds are used when high
output is first priority.
When in work, always ensure the hydraulic spool valve that operates the folding of
the wings is in float position to enable the wings to freely follow all contours of ground
(Fig. 5).
Whilst mowing it is possible to continue working when turning the 430 Rotary Cutter
on the headlands, however we recommend the machine is slightly raised to prevent
the skids marking the ground and reduce the wear on the skids.
When operating in confined areas it is possible to cut going backwards, but it is
advisable to slightly raise the machine, particularly if in scrub, where there is the risk
of hitting hidden solid obstacles obscured by dense undergrowth.
Always exercise particular care when operating over uneven ground surfaces. Do not
allow the blades and blade holder to frequently hit the ground.
Do not allow debris to build upon the cutting decks in dry conditions, as this can be a
fire hazard, in wet conditions it will place unnecessary strain on the machine and may
foul the drive shaft causing damage.
Fig. 5 contours of the ground

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Options
Lighting kit.
Transportation
First disengage the PTO drive and half raise the machine, fold the wings fully upright
and secure rams with locking strap (Fig. 6). Never transport along public highways
with the wings only supported by the hydraulics.
Please observe Public Highway Regulations, concerning the towing of implements,
and securely attach a registration and lighting board.
Warning
Do not run the machine with the wings raised, serious
damage will result to the drive line.
Warning
Avoid transporting machine at high speed over rough ground
Maximum speed on highway –20mph (30kph).
Fig. 6
Transportation position
Secure wings
with transport
strap

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Machine Protection
To prevent gearbox damage all rotors are protected by a slip clutch on the input
shaft. When cutting in extreme conditions where stumps, rocks and other such solid
objects are likely to be found it is recommended that the operator reduces the engine
revs to allow the blades to pivot more easily when striking solid objects, and proceed
with caution.
The clutch settings should not be altered without reference to Service and
Maintenance. Never over-tighten the pressure springs on the slip clutches (Fig. 7) as
this could result in severe damage to the gearbox and drive lines, as well as
invalidating the warranty.
If the machine has been laid up for any length of time, there is a risk of the
clutch plates rusting and seizing together. Never operate the machine in this
condition, as there will be no protection to the driveline and gearboxes against
shock loading. To free the clutch plates first slacken all pressure spring bolts and run
up the machine for a short period, deliberately try to cause the clutch to slip. Finally
re-tighten the tension spring bolts to their original length, taking great care not to
over-tighten. Alternatively refer to page 17.
If in any doubt, consult Spearhead’s Service Department or your local Spearhead
Dealer for further advice.

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Service & Maintenance
Safety First
Never leave the tractor seat without first disengaging the PTO and
stopping the engine.
Ensure all rotating parts have stopped turning.
Never attempt any repairs, maintenance, service or any other
checks with the machine carried on the tractor hydraulics.
Always fully lower to the ground, or securely prop the machine on
substantial servicing stands.
Always replace all guards and retaining chains after
servicing/maintenance completed.
It is imperative that the following checks are carried out in order not to
invalidate your warranty; these are carried out before the first
operation, after the first hour, then after 4 hours.
These checks are:
1. Gearbox bolts, including the splitter box.
2. Retaining bolts on the drive shafts.
3. Grease all points including drive shaft tubes.
4. After the first 50 hours drain and replace the gearbox
lubrication. Replace with liquid grease (NLGI 000).
5. All other nuts and bolts
Warning
Never carry out any servicing or maintenance work without
first disengaging the PTO and then stopping the tractor
engine before leaving the seat.
On delivery of your machine check that the dealer has
completed the P.D.I form, ensure the warranty registration
form is completed and returned.

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Servicing & Maintenance
Daily
Grease all points.
Check bolts are tight on all gearboxes.
Check condition of blades and blade bushes; ensure all retaining bolts are
fully tight.
Check gearbox lubrication, replenish as necessary to the correct level line on
the dipstick, provided with each gearbox.
Fig. 8 Lubrication points
A Wing ram
B Wheel stem grease points
C Wheel bearings
D Input PTO shaft
E Wing PTO shafts
Fig 8
RH blade rotation
Anti clockwise
LH blade rotation
Clockwise

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Service & Maintenance –Every 8 hours
Dismantle and clean the main P.T.O shafts sliding surfaces and re-grease;
failure to do this will result in serious damage to the gearboxes.
Grease all universal joints, if under-greased this joint will soon fail.
Grease the wing drive shaft tubes.
Lubricate the retaining collar on all the drive shaft guards (Fig. 9).
Grease PTO inner tube and push pins (Fig. 9).
Check all bolts are tightened to the correct Torque (Fig.10).
Torque Settings
The Torque figures given below are recommended maximum settings only.
Size:
Tensile strength:
Description:
Torque setting:
Nm.
M16
8.8
Rotor gearbox bolts
280
M24
8.8
Blade bolts
950
Wheel nuts
270
M14
PTO clamp bolt
150
For maximum life and performance, the UJ must be greased regularly. Lubricate the driveline
up to 6 pumps of grease may be required.
The metal drive tubes must be greased to telescope properly.
Shielding is subject to damage from abuse and weathering. Replace all damaged
components and all shielding removed during maintenance.
Do not use PTO adapters drivelines. Replace special clamp bolts only with genuine OEM
parts, periodically check tightness of nuts.
Primary Input Shaft
Fig 10
Fig 9

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Servicing & Maintenance
Regularly
Check there is no wrapping of string, plastic, grass or other debris between
rotor boss and gearbox oil seal.
Inspect gearbox seals for leaks.
Clear grass and other debris from the deck.
Regularly check the rotor boss retaining castle nut for tightness. First remove
the split pin, select the correct size socket in 3/4” drive and fully tighten the
nut. When replacing the split pin, do not slacken the nut to align the hole,
always tighten. Failure to regularly check this nut will result in serious wear to
hub, which is expensive to repair.
It is most important that all gearbox bolts are regularly checked to be very
tight. When the machine is new there will be a ‘bedding in’ period where very
frequent checking is important.
Blades
Caution! When carrying out maintenance work on or near the blades be careful
of free-swinging blades over-centering and falling. It is recommended that
protective clothing including hardhat and goggles are worn.
The blades can be re-sharpened by grinding the cutting edges, care must be taken
that the blades are of the same weight and length after grinding. Do not overheat
when grinding, as this will affect the hardness of the blades. All the blades are free
swinging and swivel on hardened steel bushes, which are replaceable. When
replacing blades, it is important that blades are replaced in sets, in order to retain
balance of the rotor. Bushes must be replaced when new blades are to be fitted.
If the blades are showing any signs of severe wear, damage or cracking, they must
be replaced immediately. Never attempt to weld the blades, as this will make them
very brittle thus extremely dangerous. Do not take risks with the cutting blades - if in
doubt, replace.
L LH Blade

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430 Slip Clutch Maintenance & Settings
Check the condition of the friction discs before use and following periods of storage.
Release the tension from the springs and turn the clutch body while holding the inner
P.T.O hub stationary, if unable to turn freely strip down clutch and free off seized
parts ensuring to remove all traces of rust. Rebuild and adjust the spring
compression to the original setting.
Following seasonal use, unload the spring tension and store clutch assembly in a dry
place. Check condition of friction linings and reset spring compression to original
height before use.
Should the assembly overheat due to frequent or prolonged clutch slipping, dismantle
for inspection. The original thickness of the lining is 3.0 mm, replace them when worn
to 2.0 mm. Clean up all contact surfaces and replace any damaged components
before assembly.
Fig 12 (h)
Position
Setting
Machine
16 mm
Input
1200Nm
430
Warning
The slip clutch is there to protect the gearbox. If the
blades strike a large obstacle they may get damaged or
break - avoid these conditions.
Fig 12