Standen T2 User manual

T2
Two Row Potato Harvester
From 2021
Standen Engineering Limited.
Hereward Works,
Station Road, Ely,
Cambridgeshire.
CB7 4BP
England.
Tel: [phone] www.standen.co.uk Fax: [phone]

On delivery, check that the machine is as ordered and has not been damaged in transit.
Please report any shortfall to your Standen dealer.
The contents of this handbook, although correct at the time of publication, may be
subject to alteration by the manufacturers without prior notice.
Standen Engineering Limited operate a policy of continual product development.
Therefore, some illustrations and/or text within this publication may differ from your
machine.
The copyright of this handbook is the property of Standen Engineering Limited,
Hereward Works, Station Road, Ely, Cambridgeshire. CB7 4BP. This handbook is
issued on the condition that it must not be used, copied or exhibited without their written
permission.
IMPORTANT
This operator’s handbook should be regarded as part of the machine. Suppliers of both
new and second-hand machines are advised to retain documentary evidence that this
handbook was supplied along with the machine.
On installation of the machine (i.e. starting off in the field), the New Machine
Installation Record Card should be completed by the dealer/distributor and be
countersigned by the customer. The document is proof that the correct procedures
have been followed.
The New Machine Installation Record Card should be returned to Standen Engineering
Limited within 7 days of installation. Failure to do so may invalidate the machine
warranty.

CONTENTS
INTRODUCTION
Introduction to the handbook 1.1
Warranty 1.2
Replacement parts 1.2
SAFETY PRECAUTIONS
Safety 1.3
Machine noise level 1.3
Operation 1.3
Transport 1.4
Maintenance 1.4
Safe use of potato harvesters 1.5
INSTALLATION
T2 1.7
Tractor suitability 1.7
Tractor wheel setting 1.7
Attaching the harvester
1.8
PTO shaft 1.9
OPERATION
Drawbar 1.10
Digger assembly 1.10
Depth wheels 1.10
Diablo rollers 1.11
Automatic dep
th control 1.11
Disc coulters 1.12
Shares 1.12
Haulm intake rollers 1.13
Digger web 1.13
VariSep
1.13
Sieving web 1.14
Rotary agitators 1.14
Sweeping clod fingers 1.15
Clod breaking fingers 1.15
Haulm roller 1.16
Haulm fingers 1.17
Roller table separator 1.17
Omega separator units 1.19
Spreader unit 1.19
Discharge elevator 1.19
RH wheel tracking 1.21
Wheel steering and self-centring 1.21
Machine levelling 1.21
Powered axle 1.22
Hydraulic systems 1.23
Electrical control system 1.27
Emergency stop buttons 1.27
HARVESTING
Starting off your harvester 1.28
Damage prevention 1.28
Getting the best results
during harvesting 1.30
MAINTENANCE
Maintenance of the
hydraulic systems 1.34
Residual hydraulic pressure
dump procedure 1.36
Steering Ram Link Circuit 1.37
Bleeding / filling wheel motors 1.38
Purging wheel motor grease
collars 1.38
Maintenance of the
mechanical drives 1.38
Roller table oil seal replacement 1.39
Tightening the roller bearings 1.39
Maintenance of the
electrical system 1.40
New machines 1.40
Machine lubrication 1.40
Daily maintenance 1.41
Weekly maintenance 1.41
Annual maintenance
1.41
Out of season storage 1.42
SPECIFICATIONS
Dimensions 1.43
Weight 1.43
Technical data 1.43
Nut and bolt tightening torques 1.43

Introduction to the Handbook
This handbook provides the information for the operation, adjustment and maintenance
of your Standen T2. To enable you to achieve the best results from the machine, the
manufacturer recommends that you read the handbook thoroughly prior to using the
machine for the first time.
Record below the details of your machine.
Dealers Name ..............................................................................…………………………..
Address ...................................................................................................…………………..
...............................................................................................................……………………
Telephone Number ..............................................................................……………………..
Machine Serial Number ............................................................................…………………
Date Purchased ........................................................................................…………………
Date Started Work ....................................................................................…………………
Throughout this handbook the terms 'front', 'rear', 'left-hand' (LH) and 'right-hand' (RH)
are derived from the tractor driver’s position facing forward in the normal direction of
travel.
Adjustments to the machine may have to be made singly or in combination according
soil conditions. Always allow the machine to settle to a new setting before making
further adjustments.
Recommended lubrication and maintenance instructions are included in this handbook
and if followed will help to keep the machine in a safe working condition.
This symbol indicates important safety messages within this handbook.
When you see this symbol, be alert to the possibility of injury to yourself or
others and/or damage to the machine and carefully read the message that
follows.
1.1
INTRODUCTION
WELDING WARNING:
Before carrying out any welding on the harvester always disconnect
the KS1 & KS2 plugs from the bottom of the harvester control module
and completely disconnect the harvester from the tractor. Failure to
observe the above precautions may cause severe damage to the
harvester and tractor electrical systems.

Warranty
Should the machine suffer any faults or defects within the warranty period, please
contact your dealer. The warranty shall be effective only if the dealer is informed of any
such defect as soon as practicable upon discovery.
Replacement Parts
Recommended replacement parts are designed for your machine and have the full
backing of the warranty. Only when recommended parts are used can responsibility be
considered under the terms of the warranty.
The rear of this handbook contains a list of spare parts available through your Standen
Agents. Each illustration shows a complete unit or assembly in exploded form.
Standen's policy of continual product development means that components or even
complete assemblies are redesigned from time to time. Where possible the
modifications are shown in the remarks column.
The first printing of each page in the spare parts section is identified as issue 1 at the
foot of the page. When a complete unit or assembly has been redesigned the
appropriate pages are revised and printed as issue 2. The revised pages are filed
behind the existing issue so that a complete modification history is gradually built up.
When using an illustration and parts list it is essential that both are of the same issue.
Always quote the full serial number of your machine when ordering spare parts.
INTRODUCTION
1.2

Safety
The Standen T2 has been designed to comply with current Safety Regulations.
However, as with all machinery there will be inherent dangers whilst operating and
carrying out maintenance on the machine. The following safety precautions should
therefore be brought to the attention of all persons operating and working on the
machine. The list is not exhaustive. All machinery is potentially dangerous and the
operators must exercise great care at all times. Standen Engineering Limited will not
accept liability for damage or injury caused by their products except when such liability
is specifically imposed by English statute.
Machine Noise Level
Average continuous noise level at the operator’s ear with machine harvesting crop is
80.75dB (maximum peak level 85.6dB). It should be noted that this level could vary
dependant upon tractor/machine combinations.
Operation
The machine must never be
operated by untrained
personnel or children.
Never set machinery in
motion before ensuring that
everyone in the vicinity is
aware of your intentions.
Never wear loose clothing
and always tie back long hair
whilst working on the picking
area of the machine.
Before carrying out any work
on the machine, lower the
machine to the ground,
switch off the tractor engine,
apply the handbrake, remove
the ignition key and
disconnect the PTO shaft.
Never operate the machine
with the discharge elevator in
the folded transport position.
Never attempt to fit drive
chains or drive belts to the
machine while the drive
sprockets or pulleys are in
motion.
Normal safe working
procedures should be
adopted at all times. Reduce
speed when transporting the
machine on sloping ground.
Do not work on ground where
there is a possibility of
overturning or across steep
slopes.
The working area should be
kept clear and free of
obstructions at all times.
Be alert for hidden
obstructions. Should the
machine hit an obstruction,
stop and check for damage
before proceeding.
1.3
SAFETY PRECAUTIONS
Never allow children or
animals in the vicinity where
machines are working and
never allow anyone to ride
on the machine.
Wear substantial or proper
safety footwear. Avoid loose
clothing near moving parts.
Wear gloves when handling
the implement or parts with
sharp edges.

When in transport, the
discharge elevator must be in
the folded transport position.
Transport
The operator must not leave
the tractor seat until the
machine has been lowered to
the ground, the tractor engine
switched off, the handbrake
applied and the ignition key
removed.
Never reverse or turn unless
the machine is in the raised
position.
All guards, covers, warning
transfers and safety devices
must be correctly fitted and
operable at all times.
Inspect the machine on a
regular basis and replace
damaged or worn parts as
necessary.
Inspect the machine for
damage after use. Rectify as
required.
When in transport, the digger
assembly must be locked in
the raised position.
Only transport the machine at
a speed suitable to the
prevailing conditions. Be
aware of the weight and
overall length of the machine
at all times.
When left free standing, i.e.,
not attached to the tractor,
the machine must be on level
ground.
When working under the
machine or if the machine is
to be left to stand for any
length of time, the digger
assembly should be locked in
the raised position.
Before working on the
machine, all free moving
parts should be locked to
prevent them moving.
Inspect the hydraulic hoses
and fittings for cuts and
abrasions. Replace
immediately.
The hydraulic system may be
under pressure with the
machine at rest. Ensure all
residual pressure is released
before disconnecting any
pipework.
Regularly lubricate the
machine as per the
operator’s handbook and
check the tightness of all nuts
and bolts.
Maintenance
SAFETY PRECAUTIONS
1.4
Always use mechanical or
additional help when lifting heavy
parts.
Safety is the responsibility of the
persons working with this
machine. Think "safety" at all
times. Read and remember the
contents of this handbook.
Never operate the machine in
a state of disrepair.
Always switch off the
electrical control system
before transporting the
harvester on the road.

1.5
SAFETY PRECAUTIONS

SAFETY PRECAUTIONS
1.6

T2
The Standen T2 is a tractor-drawn potato harvester designed to harvest two rows of
potatoes, clean, elevate, and load them into a trailer running alongside. The basic
machine is built with a digging width of 1630mm, and direct loads the crop with no
manning on the machine. Optionally, a manned picking table can be fitted.
Tractor Suitability
The harvester requires a constant hydraulic oil supply from the tractor of a minimum 50
litres/minute with a low back pressure/free return to the tractor. A load sensed oil supply
above this figure this is recommended. Also required is a 12volt D.C. negative earth
power supply rated at 50 amps to feed the electrical control system. A control box, and
touch screen are mounted inside the tractor cab. The control box allows the
hydraulically and electrically powered functions on the harvester to be operated from the
drivers seat while the machine is working. The touch screen gives control of all
adjustable functions, and diagnostic functions.
The T2 is designed to be towed from the pick-up hitch hook of the tractor and imposes a
transferred load of 2.3 tonnes to the tractor with basic unmanned model.
Should the T2 be towed from the tractor clevis hitch then the optional ring hitch spacer
must be used to eliminate chop on the clevis pin.
Tractor Wheel Setting
Both the front and rear wheels of the tractor must be set to straddle the bed to be lifted.
This will ensure the wheels run in the centre line of the wheelings. The instructions for
adjusting the tractor wheels are given in the tractor manufacturer's handbook.
When carrying out wheel adjustments, always place the jack on firm
ground under a solid part of the tractor. Before removing a wheel, place a
stout support under the tractor frame in case the jack should become
dislodged.
Before starting work, check that the machine is in a safe working condition.
Check components that could work loose during operation such as wheel
nuts, chains, sprockets and share arms etc. These checks are especially
important during the first week of work.
Pay attention to the maintenance and lubrication instructions within this
handbook and pay particular attention to the safety precautions, they are
written as a guide to protect you and others.
1.7
INSTALLATION

Attaching the Harvester
Raise the harvester on the pick-up hitch. The harvester chassis should be nominally
level. If the chassis is in a nose up attitude or extremely nose down, the drawbar eye
(item 1, figure 1) should be adjusted accordingly to compensate. To adjust the eye
position, remove the bolts (item 2, figure 1) and move the eye to the required position.
Refit the eye using a minimum of 2 bolts. The eye can be turned over to achieve a
second range of adjustments. The stand (item 3, fig 1) is provided so that the machine is
held at a suitable height for safe coupling to the tractor. When the machine has been
securely attached to the tractor, the stand can be folded back into the working position
by removing the pin (item 4, figure 1), rotating the stand and then re-securing with the
pin.
Switch off the tractor engine before making any other connections. The hydraulic and
electrical connections can then be made. Connect the hydraulic return hose marked
‘RETURN’ to the tractor manufacturers recommended low back-pressure return
coupling. Connect the pressure hose marked ‘FLOW’ to the tractor outlet recommended
for constant supply. If in doubt, refer to the tractor handbook. Connect the load sense
hose to the tractor L/S outlet. Mount the in-cab control boxes securely inside the tractor
in a position where they are comfortable to operate when seated. Connect the control
box power supply cable directly to the tractor battery. The black lead to negative (-) and
the red leads to positive (+). Mount the tractor harness plug on the rear of the cab in an
accessible position. Connect the control box, and touch screen cables. Connect the
harvester control harness plug to the socket on the tractor harness, ensuring that the
harness is safely routed. Connect the power lead. Connect the lighting plug to the
tractor lighting socket.
Fig 1
The operator should have read and understood the tractor operator's manual
prior to attaching the machine and putting it to work.
INSTALLATION
1.8

PTO Shaft
The standard specification machine is geared to operate at 1000 rpm PTO speed.
The PTO shaft supplied with the machine may require cutting to the correct length to
suit individual tractors but should be kept as long as possible in all cases.
1. Separate the male shaft (item 1, fig 2) and female shaft (item 2, fig 2) and fit them to
the tractor and harvester respectively.
2. Support the shafts alongside each other and mark the maximum possible length.
3. Cut the surplus length equally from both male and female drive tubes and guards.
4. Once the correct length of shaft has been obtained, remove all rough edges and
swarf.
5. Grease the shafts to ensure they telescope correctly and then fit the shaft in place.
6. Check the PTO shaft does not foul any part of the machine or tractor and inspect the
guards to make sure they are fitted correctly and are not damaged.
7. Finally, attach the safety chains (item 3, fig 2) to secure anchoring points on the
tractor and machine ensuring that the chains will not over-tighten when the machine
is turning.
Refer to the manufacturers instructions. These are fitted to all PTO shafts when the
machine is delivered.
Ensure a minimum of 1/3
rd
overlap and check that there is no possibility of
the shafts butting up when the tractor linkage is raised.
Fig 2
1.9
INSTALLATION
It is essential that the PTO shaft be matched to the tractor to give the correct
drive-line and to ensure that it is safe in work. An incorrectly fitted or badly
guarded PTO shaft can be lethal. Do not take chances.

Drawbar
The steerable drawbar is operated by the switch ‘Drawbar right/left’ on the touch screen,
or by the left-hand joystick on the slave box. The drawbar is used in conjunction with the
axle steering to ensure the machine operates parallel to the rows.
Only operate the drawbar when the digger assembly is raised or when the
machine is moving otherwise components may be damaged.
Digger Assembly
The digger assembly, which includes the depth wheels, disc coulters, shares and digger
web is retained in the raised position by transport chains. Before attempting to operate
the digger assembly the transport chains (item 1, fig 3) will need to be unhooked from
the chassis.
The digger assembly is controlled electronically from the in-cab control box. The 'Digger
Share' rocker switch manually raises and automatically lowers the digger web. When set
to the digger is in the automatic / lower position, and will continue to lower until the
depth wheels or shares rest on the ridge. Returning the switch to the neutral position will
hold the digger at its present setting. In operation the digging depth is set using the
‘Auto Depth’ control. The set depth is displayed on the touch-screen allowing the
operator to adjust the working depth through the field.
Depth Wheels
The depth wheels (item 1, fig 4) running on each ridge control the share depth. Their
setting is very important to the effective operation of the harvester. The turnbuckle (item
2, fig 4) sets the working depth of the wheels. Lengthening the turnbuckle will cause the
shares to run shallower beneath the top of the ridge and shortening will allow the share
to run deeper.
The wheels are mounted on rubber torsion springs (item 3, fig 4) which allow the weight
to be carried off the wheels to reduce compaction of the ridge, or for additional pressure
to be put on the ridge to consolidate it in light conditions when the flow over the shares
is poor.
OPERATION
1.10
Fig 4Fig 3

The pressure setting needs to be made when the machine is in work so that the relative
working position of the depth wheel to the ridge is correct. By positioning the clamp
stops (item 4, fig 4) in the pressure-setting quadrant, weight can be removed from the
depth wheel, or extra pressure can be added to the wheel.
NOTE: Care should be taken to ensure that the depth wheels are not locked solid.
Free float must be available when the digger is raised and lowered.
Row width settings are adjusted by loosening the clamp bolts (item 5, fig 4), and sliding
the wheel assembly until positioned centrally over the ridge. Repeat for the other wheel
ensuring they are set symmetrically about the centre line of the machine. The depth
wheels are each fitted with a scraper (item 6, fig 4). The scrapers should be set as close
to the wheels as possible without fouling them.
Diablo Rollers (optional)
Diablo rollers can be fitted in place of the depth wheels. Rubber torsion springs allow the
weight to be carried off the roller to reduce compaction of the ridge, or for additional
pressure to be put on the ridge to consolidate it in light conditions when the flow over the
shares is poor. Hydraulically powered diablo rollers are available for use in soil
conditions where poor ridge flow over the shares onto the digger web is regularly
experienced.
The button starts/stops the diablo roller drive and speed can be varied by adjusting
the flow setting on the touch-screen. Setting the speed of the diablo rollers to run slightly
faster than ground speed will induce a positive flow of the ridge onto the shares. Care
must be taken not to run the diablo rollers excessively fast as this can cause scuffing to
potatoes that are near the top of the ridge.
Automatic Depth Control
Pressing the button turns on the automatic depth control. Selecting will manually
raise the digger. The depth wheels control the depth setting of each digger ram
independently. The time delay for each side of the digger can be set by adjusting the left
and right delay parameters via the touch-screen. Maximum and minimum dead-band
limits can also be set. When the auto-depth control is active, a numerical figure
representing the set depth is displayed. In work, the digging depth can be varied using
the auto-depth parameter on the touch-screen.
A depth sensor (item 7, fig 4) is fitted to each depth wheel unit. The depth control unit
allows each wheel to sense the height of the ridge it is running on and in doing so,
maintains the constant depth of the share below the top of the ridge. The depth control
sensor detects the position of the top of the depth turnbuckle. The initial depth setting
should be made with the machine on a firm level surface. Place a 10” (250mm) spacer
block under each depth wheel and lower the digger until the shares touch the ground.
In this position, adjust the turnbuckles so that the top pin is central in the slot (item 8, fig
4 ). By default, the depth on the screen should be set to 250mm. The depth adjustment
can be varied approximately +/-75mm by the operator from the tractor cab.
1.11
OPERATION

Disc Coulters
On row work, the harvester is fitted with four disc coulters (item 1, fig 5). On full width
bed work, the harvester is fitted with two disc coulters. The discs run on either side of
the ridge, cutting and parting the haulm and trash in front of the shares whilst at the
same time containing the ridge and feeding it over the shares onto the digger web.
To set the disc coulter row width/cutting width, release the clamp bolts (item 2, fig 5) and
slide the disc assembly along the bridge beam to the required position. When correctly
set the discs should be approximately 20mm clear of the edge of the share blades. To
set the disc coulter depth, turn the adjusting handle (item 3, fig 5), which also increases
the spring load on the disc. The disc coulters are each fitted with two scrapers (item 4 &
5, fig 5). These should be set as close to the disc as possible without fouling it.
For very light soil conditions, hydraulically powered disc coulters are available to help
keep the discs turning. Hydraulic power is derived for the same source as for the
powered diablo rollers. Total combinations of hydraulic options need to be discussed
with Standen Engineering Limited
Shares
To adjust the angle of the shares loosen the locknuts (item 1, fig 6) on both sides of the
machine, slacken mounting bolts (item 2, fig 6 ) and re-position adjuster (item 3, fig 6).
Ensure both sides are adjusted evenly by measuring from the tip of the outer shares up
to the disc support bridge above. The points of the share should be kept as high as
practicable whilst still maintaining adequate digging depth. Lowering the points will
assist penetration but may increase risk of crop damage. If the soil has been adequately
cultivated this should not be necessary. If the pitch is too steep (points lowered) it can
greatly increase the loading or ‘bulldozing’ effect on the share frame, especially when in
hard or tough conditions. Regularly check for soil build-up on the share frame
(especially in wet conditions) as a pad of soil at this point will create a considerable
braking effect on the digger web. Ensure that the share frame is not in contact with the
web bars at this point.
Fig 5 Fig 6
OPERATION
1.12

Haulm Intake Rollers
Haulm intake rollers (item 1, fig 7) are fitted for two reasons. The primary reason is to
draw in loose haulm and trash from the sides of the ridges and feed it onto the digger
web, thus preventing it from building up on the leading edges of the web sides or
between the centre disc coulters. The second function is to prevent potatoes from rolling
out of the front of the digger web between the discs coulters and the web sides.
Depending on the width of the digger web and the row width configuration to be lifted,
the haulm roller build will vary. The rollers are spring loaded onto the digger web bars.
The outer roller assemblies are fitted with tension springs (item 2, fig 7), and are
tensioned by the adjusters (item 3, fig 7). The centre rollers (if fitted) are mounted on a
spring-loaded arm and are tensioned similarly with a coil spring and threaded adjuster.
Alternatively, rubber deflectors may be fitted between the centre disc units.
Digger Web
The standard specification machine is fitted with a 1630mm wide, 36mm pitch digger
web. A 1500 mm digger web is available as an option. Also, should an alternative pitch
web be required to suit particular crop and soil conditions, this will be a special
requirement and will need to be discussed with Standen Engineering Limited. The
spring-loaded tension rollers (item 1, fig 8) maintain the drive on the return side of the
web. To tension the web, loosen the locknuts (item 2, fig 8) and reposition the spring
adjuster (item 3, fig 8). Ensure both sides are adjusted equally.
The digger web is driven by the motor gearbox unit (Item 4, fig 8). The button
starts/stops the digger web and the speed is set on the touch-screen.
VariSep
The drop height from the digger web to the sieving web can be adjusted using the ‘Web
Split’ button on the slave box. The gap between the two webs can be manually set
according to the crop size, and the separation required. The gap is adjusted by releasing
the locknuts (item 5, fig 8 ) ) and moving the adjuster (item 6, fig 8 ) until the required
gap is obtained. Ensure both sides are adjusted evenly.
1.13
OPERATION
Fig 8Fig 7