Silvan Selecta Oktopus 500L User manual

Operator’s Manual
MANSLV-1 - Rev C October 2018 500 Litre Linkage Oktopus Sprayer

1
Contents
Contents
Silvan is an Australian owned company
specialising in the supply of crop protection in
Contents
Contents 1
Your Sprayer Details 1
Warranty 2
Specifications 3
Safety Information 4
Operation
Attaching to the Tractor, PTO shaft length 7
Installing Control Box 7
Adjusting Air Diffusers 8
Starting the Sprayer 9
Pressure adjustment 10
Spray nozzles 11
Nozzle Selection and Calibration
Nozzle Selection, Checking Calibration 12
Nozzle output chart 13
Examples and Calibration Worksheets 13 -14
Lubrication and Maintenance
Daily, Weekly ,Monthly and Annual Maintenance 15
Trouble Shooting 16
Trouble Shooting 15
Lubrication and Maintenance 16
Warranty Certificate 19
YOUR SPRAYER DETAILS
Record the details of your sprayer here for future reference
when discussing service with your Silvan dealer, ordering
parts or making a warranty claim.
SERIAL NUMBER _____________________________
MODEL ________________________________________________
DATE OF DELIVERY _____________________________
SELLING DEALER ________________________________________________
ADDRESS ________________________________________________
TELEPHONE NO. _____________________________
INSTALLED BY _____________________________

2
New Product Warranty
Silvan Australia Pty. Ltd. builds equipment to a high level of specification using components from
quality suppliers. The following information is provided to assist you with any repairs required within
the warranty period. All warranty repairs on Silvan products are carried out by Silvan dealers. If any
warranty repairs are required on Silvan products, it is recommended that the product be returned to
the place of purchase. It is good practice to keep a record of equipment maintenance both during and
after the warranty period.
The warranty policy below explains the extent and limitations of your Warranty coverage on
Silvan Products.
This warranty is the only warranty applicable to Silvan new products ('Products') and, to the
maximum extent permitted by law, is expressly in lieu of any other conditions or warranties
expressed or implied in relation to the Products.
Subject only to legislative obligations to the contrary, Silvan shall not be liable for incidental or
consequential damage resulting from ownership or use of a Product. Silvan does not authorize
any person to create for it any other obligation or liability in connection with these products.
Silvan warrants its authorised Dealer, who in turn warrants the original purchaser (owner) of each
new Silvan product that it will repair or replace the product, or, pay the cost of repair or
replacement, as determined by Silvan without charge for labour or any defective or malfunctioning
parts in accordance with the warranty limitations and adjustment schedule below.
The warranty period begins on the date the product is delivered to the first retail purchaser for a
period of 12 months
This Warranty Covers: Only conditions resulting directly from defects in workmanship or material
under normal use and service.
Warranty Exclusions: The Warranty does not cover:
•Conditions resulting from misuse, use of incompatible chemicals, exceeding machine
specifications including overloading, impact damage, negligence, accidental damage or
failure to perform recommended maintenance services.
•Any product which has been repaired by other than an authorised Silvan service outlet in
a way which, in the sole and absolute judgement of Silvan, adversely affect its
performance or reliability.
•The replacement of maintenance items such as diaphragms, batteries, V belts and ground
engaging components, etc.
•Loss of time, inconvenience, loss of use of the product, liability to third parties or any other
consequential damages.
•Incidental costs associated with a warranty repair including any travel costs, out of hour’s
labour charges, cleaning costs, transportation costs, freight costs or any communication
costs.
•The repair of a defective product qualifying under this warranty will be performed by any
authorised Silvan service outlet within a reasonable time following the delivery of the
product, at the cost of the owner, to the service outlet’s place of business. The product
will be repaired or replaced, using new parts supplied by Silvan. Silvan, at its absolute
discretion, may choose to pay the cost of replacement or repair of the product.
The owner is responsible for the performance of regular maintenance services as specified in the
Owner/Operator Manual applicable to the product. Failure to carry out regular maintenance may
invalidate warranty.

1
Specifications
General
Silvan Linkage Oktopus Air Assist sprayers are
for use in the application of agricultural
chemicals in vineyards, berries and trellis
crops. The sprayers use a high pressure pump
and nozzles to atomise the chemical solution,
together with a turbine fan and multiple air
outlets to distribute the spray.
Tank
Polytuff impact resistant polyethylene.
Capacity 500 litres with calibrated level
indicator.
Offset, non spill screw down lid of 255 mm
diameter with basket strainer.
Continuous by-pass agitation in bottom of
tank.
Pump
Constant displacement oil backed diaphragm
pump with Nitrile diaphragms and corrosion
resistant, anodised aluminium body.
Pump Model
500 litre APS-96
Pump output and maximum operating
pressure at 540 PTO rpm as shown below.
Pump No. Output Max. Pressure
l/min gpm Bar psi
APS-96 94 20.6 40 580
Fan
The Silvan Oktopus sprayer uses a turbine fan
(or centrifugal wheel) 450mm diameter with
multiple (5+5) adjustable air ducts with
diffusers. The fan unit has a polyethylene cowl
with expansion chamber and protective mesh
screen.
Two speed oil bath gearbox with neutral
position
Max.Speed 540 PTO rpm 2,700 rpm
Air speed –450 dia fan 80 m/sec
Capacity - 450 dia fan 14,000 m3/hr
PTO Drive
Quality 540 rpm telescopic drive PTO shaft
with safety shields.
Controls
12 volt electric valve set with manual pressure
regulator, master valve, section valves for
left/right sides and electric pressure
adjustment. In cab switch box control.
Nozzles
10 twin non-drip nozzles for easy changing of
application rate. Flip over action to turn on or
off.
Brass body with removable hollow cone
ceramic jets.
Filtration
Three stage filtration with removable elements.
Tank lid strainer 18 mesh.
Suction line filter 50 mesh (blue).
Pressure line filter 80 mesh (yellow)
Frame
Heavy duty galvanised steel construction.
Reversible Category I and II linkage pins on
500 litre sprayers.
Optional Equipment
Automatic rate controller
Dimensions and Weights
With PTO drive and standard equipment fitted.
Length L, width W, height H, all in (mm).
Mass M(kg) with tank empty.
To calculate gross mass with tank filled add 1
kg per litre of tank capacity.
.
500 litre L1400 W1190 H2500 M140
Power Requirement
Minimum tractor PTO horsepower at 540 rpm.
500 litre 50 HP

1
Safety Information
Before operating the sprayer read the following safety instructions.
Failure to comply with these warnings may result in serious injury or
death.
Whilst your Silvan Oktopus Air Assist Sprayer has been designed and manufactured to incorporate all
necessary safety features it is essential that any person who operates or works on the machine is
aware of the safety precautions that should be exercised.
This sprayer is designed and manufactured
solely for the purpose of applying agricultural
chemicals to crops. Under no circumstances
should it be used for any other purpose.
Before using the sprayer carefully read and
ensure you understand the contents of this
manual and any other manual supplied with the
sprayer.
Before operating the sprayer read all the safety
warnings which are carried on various parts of
the machine. Refer to the next two pages for a
location diagram and the wording of these
warnings.
Never allow an inadequately trained person to
attach or operate the sprayer.
Do not operate the sprayer whilst wearing
loose clothing, unrestrained long hair, jewellery
or anything which could become entangled in
rotating components or limit your vision.
Only operate the sprayer on a tractor fitted with
a roll-over protective structure (ROPS), or a
cab incorporating a ROPS, complying with
AS1636 or equivalent.
Wear ear protection when operating the
sprayer on a tractor that is not fitted with a
sound proofed cabin.
Ensure the power of the tractor is suitable for
the loaded weight and power requirement of
the sprayer. Refer to the tractor operator’s
manual for safe working loads and relevant
tractor safety instructions.
Exercise extreme care when operating in hilly
or uneven terrain to ensure proper stability.
Adjust the tractor wheel track for maximum
stability on side slopes. Refer also to the tractor
operating and safety instructions.
Do not allow any person to ride on the sprayer
or tractor whilst it is in motion. Keep clear of
sprayer wheels whilst the unit is motion.
Do not operate the sprayer at speeds greater
than 540 PTO rpm.
Do not operate the sprayer without all the
tractor and sprayer safety shields in place.
Carefully check that PTO and driveline shields
are correctly installed.
Stop the tractor, disengage the PTO, apply the
parking brake and switch off the tractor engine
before performing any service work on the
sprayer.
Disconnect the PTO shaft at the tractor and
ensure the sprayer is properly supported and
restrained before performing any maintenance
work.
Before use of any chemicals refer to the
chemical manufacturer’s label and safety
instructions for safe handling procedures and
correct method of use. Always use the
recommended personal protective clothing and
equipment. Dispose of empty chemical
containers in accordance with the instructions
supplied by the chemical manufacturer.
Always wear gloves when removing and
cleaning filters.
Ensure that all operators and associated
personnel are familiar with the legal regulations
and codes of practice that apply to the safe
use, storage and disposal of spray chemicals.
Do not enter the sprayer tank under any
circumstances. If service to the tank is required
contact Silvan for correct maintenance
procedures.

1
Safety Information
The locations of the safety decals fitted to Oktopus Air Assist Sprayers are shown in
the pictures below. The wording of the decals is shown on the following page.
It is important that all operators read and follow the information on all safety decals
before operating the sprayer.
Failure to comply with these warnings could result in serious injury or death.
Safety decals should be kept clean and legible at all times. If any decals are missing
or unreadable they should be replaced by ordering new decals from your Silvan
dealer using the part numbers shown.
.
Warning decal front
corner of tank
Warning decal at fan rear

2
Safety Information
Wording of Safety Warnings
The wording of the safety decals shown on the previous pages is given below.
Before operating the sprayer read all safety warning decals.
Failure to comply with these warnings could result in serious injury or death
Part Number DEC101213P
Part Number 399 14 1000

3
Installation
Attaching to the Tractor
The 500 litre Oktopus sprayer is equipped to fit
tractors with either Category I or II linkage
systems. The inner end of each lower linkage
pin is Category I diameter and the outer end is
Category II. The lower holes in the top
connection plates are Category I diameter and
the upper holes are Category II. For best
stability install the lower linkage pin with the
end which is to be used to the outside.
Remove the PTO shaft from the sprayer by
depressing the locking pin. Lower the tractor
linkage and attach to the sprayer’s lower hitch
pins of the appropriate category, then connect
the upper linkage arm using the tractor’s link
pin. Secure all link pins with the tractor’s linch
pins. Raise the tractor linkage to the desired
spraying height and level the sprayer by
adjusting the length of the top linkage arm.
Clean and grease the splines on the tractor
and sprayer PTO stub shafts and install the
PTO shaft making sure that the spring-loaded
locking pins engage in the grooves of both
stub shafts. Ensure that the tractor’s PTO shaft
guard is attached to the tractor.
PTO Shaft Length
Note: Upon delivery of a new sprayer it is the
selling dealer’s responsibility to install and set
the PTO shaft to the correct length. The
following information is provided for reference.
Set the linkage height so the ends of the two
drive shafts are at their closest. Install the PTO
shaft making sure there is at least 25mm of
telescopic travel remaining between the male
and female sections. Raise and lower the
sprayer to check that the PTO telescopic tubes
overlap by approximately 1/3rd their length,
and not less than 150mm, in all operating
positions. See fig.2
If the PTO shaft must be shortened cut equal
amounts from both male and female shafts
and safety covers. Carefully remove all burrs
then clean and relubricate before
reassembling.
Cabin Mounted Control Box
Connect the electrical cables provided for the
switch box directly to the battery.
Positive = Red Negative = Black
If the cable needs to be extended it is
important to use wire of the same diameter.
These cables supply power to the electric
valves.
If an automatic rate controller is used refer to
appropriate installation manuals.
Run the controller wiring loom back to the
sprayer through a convenient outlet in the
tractor cabin, ensuring that it does not rub on
any sharp edge. Connect the tractor loom to
the sprayer loom at the quick release coupling
and ensure that all wiring is clear of the PTO
shaft and tractor wheels.

1
Installation
Adjusting the Air Diffusers.
The fan unit has multiple diffusers, Silvan units
are fitted with a 5+5 configuration. All of the
diffusers are fully adjustable in width, height
and angle.
The above illustration shows the adjustment of
each individual module (diffuser + nozzle).
Width:Loosen the U-bolt (1) and slide the
inside RHS (2) to the desired width. Re-
tighten the
U-bolt.
Height:Loosen the 8mm bolt (3) and slide
the tube outlet mount (4) to the desired
height.
Re-tighten the bolt.
Forward/Rearward tilt:Loosen the bolt (3)
and rotate the tube outlet mount (4) to the
desired angle. Re-tighten the bolt.
Upward/Downward tilt:Loosen the 2 Allen
head bolts (5) under the plastic outlet and tilt
to the desired angle. Retighten the bolts.

2
Locating Tab & Hub Clamp screw
Operation
Starting the Sprayer
Before starting the sprayer for the first time
grease all lubrication points including the PTO
shafts. Check that the oil level in the
diaphragm pump is level with the mark in the
viewer and if necessary top up with SAE 20W-
50 multigrade engine oil. Ensure that the
gearbox oil level is correct.
Refer Maintenance section for details.
First conduct a trial using clean water only (no
chemicals) to become familiar with the controls
and to check that all systems are functioning
correctly without leakage.
Check that the fan gearbox is engaged and the
required speed is selected. Never engage the
fan drive with the tractor engine running or the
PTO engaged. Moving the gearbox lever to the
high position produces maximum airflow. The
low position produces less airflow and can be
used for small or early season canopies. The
neutral position enables the pump to be
operated without the fan for putting chemicals
into the tank, hand spraying or similar
operations.
GEARBOX SELECTION LEVER (L)
The fan incorporates a centrifugal clutch
which protects the gearbox and driveline if
the PTO is engaged rapidly. The sprayer
should always be operated at 540 PTO rpm to
ensure correct operation of the centrifugal
clutch and to prevent its premature wear.
With electric valve controls, switch the Master
valve to the “Off” position before engaging the
PTO. This places the pump into by-pass
mode and closes the outlet valves to the
spray nozzles on either side of the sprayer.
Engage the PTO slowly and allow the sprayer
to run in by-pass mode. Once the pump is
primed increase the tractor speed to 540 PTO
rpm.
Flip the required number of spray nozzles to
the open position. Refer to the Calibration
section for information on nozzles and jet
selection.
Electric Motor Valves
The electric valves consist of a master valve to
switch from bypass to pressure, section valves
for left and right side nozzles which
incorporate regulating bypass compensators
and an electric pressure adjusting valve to fine
tune the spraying pressure. The compensating
ports fitted to the section valves, when
adjusted correctly, will keep the system
pressure at the same level when individual
sections are turned on and off.
Master Valve Electric Pressure
Section Valves Regulating Valve
Manual Pressure
Regulating Valve

3
Locating Tab & Hub Clamp screw
Operation
Pressure Adjustment
With the section switches turned Off and the
Master switch turned On maximum pressure
can be set by the Manual Pressure Regulating
Valve. A clockwise rotation increases pressure
and an anticlockwise rotation reduces
pressure. If the desired spraying pressure
cannot be obtained with the Manual Pressure
Regulating knob then holding up the toggle
switch on the control box will close the Electric
Pressure Regulating Valve and increase the
system pressure and vice versa.
To adjust the compensation ports:
Start the sprayer and set the spray pressure
with the master On and all sections On.
Then turn off the first section and adjust the
compensation knob R1 until the pressure is
exactly the same as it was with all sections on.
Turn the section back on and off to check the
remains constant.
Turn all sections on again and repeat for the
remaining sections.
The sprayer is then adjusted correctly.
Adding Chemicals
Chemicals are added to the tank through the
top lid opening.
Take care to avoid the spillage of chemicals or
mixed solution. Wear gloves, eye protection
and the recommended protective clothing
whilst filling with chemicals. Wash your hands
after filling if they have come into contact with
concentrate or mixed solution.
Store unused chemicals and dispose of empty
chemical containers as recommended by the
chemical manufacturer or relevant authority.
Emptying the Sprayer
At the end of each day partly fill the tank with
water and run this through the pump, spray
lines and nozzles to purge them of chemicals.
Use a cleaning agent such as Silvan All Clear
tank cleaner.
Rinse the tank through the lid and empty with
the drain valve to remove powdered material.
Never leave chemicals in the tank that could
settle to the bottom and break into lumps that
may block the suction filter.
Dispose of unused chemical mix, rinse water
and containers as recommended by the
chemical manufacturer or government
authority.

4
Locating Tab & Hub Clamp screw
Operation
Spray Nozzles
The spray nozzles have an outlet at each end
but only the jet that is flipped to the outward
facing position is “on”. This facilitates easy
changing between jets of different sizes, for
example, when requiring different application
rates to suit concentrated and diluted spraying.
Individual nozzles can be turned off when not
needed by flipping the nozzle 90 degrees so
that neither of its jets is facing outwards.
Nozzle direction can be adjusted by loosening
the attaching nut and angling the nozzle.
The nozzles include a non-drip valve, which
closes when the pressure drops below 1 Bar.
Nozzle Alignment
The Oktopus sprayer is assembled at Silvan
with the air ducts and modules placed in the
standard positions. If their position should be
changed, make sure that the jet is spraying
into the air stream and not fouling on the
diffuser as shown below.
HCC Hollow Cone Ceramic Jets
HCC hollow cone ceramic jets produce a
superior droplet spectrum and are fitted to both
sides of each nozzle body.
The HCC components fit the standard nozzle
body and use the standard nozzle cap.
Nozzle output can be varied by fitting different
size ceramic jets. Refer to the HCC Jet Chart on
page 13.
Due to the ceramic cores of HCC nozzles, they
normally have a long wear life and require little
maintenance other than regular checking and
cleaning. The spray pattern should be observed
periodically against a dark background to detect
signs of wear, which will be indicated by a
streaky or broken pattern. If worn nozzles are
detected, then the full set of nozzles and gaskets
should be replaced.
ON POSITION
OFF POSITION
Non-drip Valve

5
Calibration
Nozzle Selection and Calibration Checking
Chemical application rates and hence nozzle
selections will vary greatly depending on the
crop type, and the stage of crop development.
Information on application rates should be
available from your chemical supplier.
Nozzle selection can be made by following the
four simple steps shown below. The final step,
checking calibration after nozzle selection, is
essential for spraying efficiency by ensuring a
known amount of spray is applied per hectare.
STEP 1 Operating Factors
First establish the following factors.
a) Application rate (l/ha) in litres per hectare.
b) Travel speed (km/hr) The speed indicated by
your tractor can be checked by timing the
sprayer over a measured distance. The timing
should be done in seconds over 100 metres with
the PTO engaged and water in the tank to
simulate real spraying conditions. In hilly terrain
the sprayer should be timed driving up and down
the hill and the two times averaged. The speed
can be calculated according to the following
formula.
c) Row width (m) The distance between rows
measured in metres. For single side spraying
use half the row width.
d) Spray pressure (Bar) A pressure of between
10 and 20 Bar is usually selected.
STEP 2 Total Output Required
Calculate the total spray output required in litres
per minute (l/min) using the following formula.
Check that the calculated output does not
exceed the rated capacity of the pump. If it does,
reduce the travel speed or the application rate.
STEP 3 Nozzle Selection
Decide on the number of nozzles to be used in
total. Note, that if not all nozzles are used, the
number of nozzles will be the number of those
“on” only.
Nozzle Output (l/min) =
Add up the flow rates of the individual jets to
check that the total output matches the
calculated value. Small variations can be
corrected by increasing pressure to increase
output or reducing pressure to reduce output.
STEP 4 Calibration Checking
After installing the selected jets, test the sprayer
with water to confirm the application rate. Fill the
tank to the brim or a specific mark then run the
sprayer for a measured time at operating
pressure and with the nozzles spraying. A run
time of two minutes should be sufficient.
Measure the volume of water, in litres, required
to refill the sprayer to the brim or the specific
mark chosen then divide this volume by the time
of the run.
Verify that the measured output matches the
total output value calculated at Step 2.
Speed (km/hr) =
360
Time in Seconds for 100m
Total Output (l/min) =
Application rate (l/ha) x Speed (km/hr) x Row width (m)
600
Output (l/min) = Volume to refill (litres)
Time (min)
UsedNozzlesofNo.Total OutputTotal

6
Calibration
HCC Hollow Cone Nozzle Chart
Nozzle Sets for Typical Spraying Applications
The nozzle sets in the following examples are suitable for typical applications when spraying grapes,
orchard fruits and berries.
1. Grapes
Application rate 600 l/ha
Travel speed 5 km/hr
Row width 3.0 m
Spraying pressure 10 Bar
If using all 10 nozzles (5/side) then each nozzle needs to apply 1.5 l/minute. From the HCC nozzle
chart above the HCC02 (Orange) at 10-11 Bar pressure will give the desired output. An alternative
would be to use HCC025 (Red) at 7 Bar pressure to give the equivalent output.
2. Orchard Fruits
Application rate 1200 l/ha
Travel speed 4 km/hr
Row width 4.5 m
Spraying pressure 15 Bar
1200 x 4 x 4.5 = 36 l/min
600
If using all 10 nozzles (5/side) then each nozzle needs to apply 3.6 l/minute. From the HCC nozzle
chart above the HCC04 (Black) at 15 Bar pressure will give the desired output. An alternative would
be to use HCC05 (Blue) at 10 Bar pressure to give the equivalent output.
Total Application Rate (l/min) =
Application rate (l/ha) x Speed (km/hr) x Row width (m)
600

1
Calibration
3. Berries
Application rate 400 l/ha
Travel speed 5 km/hr
Row width 3 m
Spraying pressure 13 Bar
If using 8 nozzles (4/side) with two turned off due to a smaller canopy then each nozzle needs
to deliver 1.25 l/min. From the HCC nozzle chart HCC015 (Yellow) at 13 Bar pressure will give
the desired output. An alternative nozzle would be the HCC02 at approximately 7 Bar to give an
equivalent output.
Calibration Worksheets
The worksheets below can be used to record the results of calibration tests on your sprayer.
Total Application Rate (l/min) = Application rate (l/ha) x Speed (km/hr) x Row width (m)
600
400 x 5 x 3
600
= 10 l/min
Date of Test: _______________
Application Rate: _______________ litres/ha
Speed of Travel: _______________ km/hr
Row Spacing: _______________ metres
No. of nozzles : _________
Output per nozzle : _________ litres/min
Nozzle Selection : __________
Pressure Setting: __________ Bar
Measured Output: _________ litres/min
(from test run)
Output (l/min) =
Application Rate x Speed x Row Width
600
x x
600
=
=
litres/min
Date of Test: _______________
Application Rate: _______________ litres/ha
Speed of Travel: _______________ km/hr
Row Spacing: _______________ metres
No. of nozzles : _________
Output per nozzle : _________ litres/min
Nozzle Selection : __________
Pressure Setting: __________ Bar
Measured Output: _________ litres/min
(from test run)
Output (l/min) =
Application Rate x Speed x Row Width
600
x x
600
=
=
litres/min

2
Lubrication and Maintenance
Daily Maintenance
General
During the first few days of operation, before
starting each day, check that all hardware is
tight and tighten all hose clamps. Inspect the
unit for leaks while running.
PTO Shaft
Grease the PTO shaft with multi- purpose
grease at the intervals shown below. This is
the amount of lubrication recommended for
normal operation. More frequent inspection
and lubrication may be needed under very
dusty conditions.
Pump
Check the oil level in the viewer daily and if
necessary top up with SAE 20W-40 multigrade
engine oil. The oil must reach the mark on the
side of the oil level viewer.
Filters
Clean all filters as stated below. More frequent
cleaning may be found necessary depending
upon circumstances. The best method for
cleaning filters is to wash them with a soft
bristle brush. Check for any tears or holes and
replace if damaged.
Check and if necessary clean the basket
strainer under the tank lid before each fill.
Always clean the suction filter before each
tank refill and at the end of the day. Close the
stop valve by pushing in and unscrewing the
yellow/red tap, then unscrew the filter cover to
remove the element. Ensure the O-ring is in
good condition when refitting.
Spraying (Bar)
pressure (psi)
2 - 5
29 - 73
5 - 10
73 - 145
10 - 20
145 - 290
20 - 50
290 - 725
Surge air (Bar)
pressure (psi)
2
29
2 - 5
29 - 73
5 –7
73 - 102
7
102
O-Ring
SUCTION FILTER COMPONENTS
Stop Valve Tap
Tank, Pump and Spray Lines
At the end of each day run clean water through the
pump and lines to purge them of chemicals.
Rinse out the tank to remove powdered material.
Never leave chemicals in the tank that may settle
to the bottom, harden and break into lumps as this
may block the suction filter.
Dispose of unused chemical, chemical mix, rinse
water and chemical containers as recommended
by the chemical manufacturer or appropriate
government authority.
Weekly Maintenance
PTO Shaft (Every 20 Hrs) Slide the PTO shaft
apart, clean the telescopic tubes with kerosene and
apply multi-purpose grease to the sliding surfaces,
then reassemble.
This is most important in dusty conditions.
Monthly Maintenance
Gearbox. Check the oil level every 50 hours and if
required top up with SAE 80W-90 gear oil.
The oil should be level with the centre of the input
shaft and can be checked through the filler plug in
the top of the gearbox using a piece of wire as a
dip stick.
Annual Maintenance
Diaphragm Pump. Drain the oil from the pump
annually, or at the end of each spraying season.
Remove the pump heads, carefully inspect the
diaphragms and replace if necessary. Also check
the inlet and outlet valves, seats and springs for
wear, damage or chemical corrosion and replace
as necessary. Refill with SAE 20W-40 multi-grade
engine oil.
Check the air pressure in the surge chamber at the
end of the pump. The air pressure behind the
chamber’s diaphragm smoothes out the pulsations
in fluid flow and should be set in accordance with
the spraying pressure being used - refer chart
below. Adjust the pressure at the valve fitting on
the chamber using a compressed air hose fitted
with a tire valve connection and a reliable pressure
gauge.

1
Trouble Shooting
Driveshaft noisy
•PTO shaft not secured properly to shafts.
•Universal joint crosses worn.
•PTO geometry not correct.
Air volume reduced
•Fan mesh blocked with leaves or debris.
•Not operating at full speed of 540 rpm.
•Fan gearbox not in gear.
Poor tank agitation
•Chemical left in tank whilst not operating.
•Chemical insufficiently mixed before filling.
Pump and hoses vibrating.
•Pump surge chamber pressure incorrectly adjusted or surge diaphragm ruptured.
•Air entering the suction line through loose or damaged fittings.
•Pump valves or valve springs worn or damaged.
•Worn nozzles or nozzles too big for the capacity of the pump.
•Air trapped in filter or suction lines.
Pump does not prime
•No liquid in tank or not covering suction inlet.
•Suction filter blocked.
•Suction filter stop valve closed.
•Suction filter bowl loose or missing O-ring.
•Suction line loose allowing pump to suck air.
•Bypass control not in by-pass position.
•Pump valve springs broken or valves worn.
Pump does not reach correct pressure
•Pump not operating at full 540 rpm.
•Suction filter blocked.
•Suction filter stop valve partly closed
•Pressure regulator not correctly adjusted
•Pressure regulator valve and seats worn.
•Pressure gauge faulty
•Pump diaphragms ruptured (pump oil grey).
•Worn nozzles or capacity of nozzles greater
than capacity of the pump.
Fan noisy and/or vibrating
•Gearbox bearings worn.
•Fan damaged or out of balance.
•PTO incorrectly installed.
•PTO geometry not correct.

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SILVAN AUSTRALIA PTY. LTD.
ABN 48 099 851 144
68 Atlantic Drive
Keysborough,VIC, 3173
Australia
Telephone: [phone]
Facsimilie: 1800 745 826
www.silvan.com.au