Hardi PRESIDIO 2700 User manual

PRESIDIO
2700
Service Manual
Version 1.00
US - 11.2016
HARDI® reserves the right to make changes in design, material, or specification without notice thereof.
HARDI® and other product names are registered trademarks of HARDI® Inc. in the U.S. and in other countries.

1.#
1 - Welcome
2 - Safety notes
Symbols ........................................................................................................................................................................................................................ 3
General info ............................................................................................................................................................................................................... 3
Important guidelines ........................................................................................................................................................................................... 3
Operator's skill .......................................................................................................................................................................................................... 4
Driving on public roads ...................................................................................................................................................................................... 4
Driving in fields ........................................................................................................................................................................................................ 4
Lights, working at night ..................................................................................................................................................................................... 4
Recommendations to users of crop protection chemicals ......................................................................................................... 5
Personal safety equipment .............................................................................................................................................................................. 5
Safety decals .............................................................................................................................................................................................................. 6
Mandatory .................................................................................................................................................................................................................. 6
Prohibited ................................................................................................................................................................................................................... 6
Danger .......................................................................................................................................................................................................................... 7
Local poison information center ...........................................................................................................8
Component Identification ................................................................................................................................................................................ 9
3 - Hydraulics
Testing and Adjusting the Transmission Pump ............................................................................................................................... 11
Hydraulic Schematic ......................................................................................................................................................................................... 18
Front Motors ........................................................................................................................................19
Component Identification ............................................................................................................................................................................. 19
Hydrostatic Motor + Gear Unit (HM7000 & HM7001) ..........................................................................20
Component Identification ............................................................................................................................................................................. 20
Operating Speed Range (Old Prior to S/N 0316103794)) .......................................................................................................... 22
Operating Speed Range (New S/N 0313103794) ........................................................................................................................... 23
Checking the Change of Displacement of the Motors ............................................................................................................... 24
Change of Displacement Test ..................................................................................................................................................................... 25
Changing a Right Hydraulic Motor to a Left Hydraulic Motor ................................................................................................ 27
Operational Diagrams ...................................................................................................................................................................................... 29
Troubleshooting .................................................................................................................................................................................................. 31
Hydraulic Transmission Block (HD0332) .............................................................................................32
Component Identification ............................................................................................................................................................................. 32
Oil Cooling Block (HD0332-03) ................................................................................................................................................................... 33
Removing the Hydraulic Valve from the Divider Block ............................................................................................................... 35
Dynamic Brake .....................................................................................................................................37
Component Identification ............................................................................................................................................................................. 37
Function Description ........................................................................................................................................................................................ 37
Hydraulic Diagram .............................................................................................................................................................................................. 38
Braking Functions with Mechanical Support .................................................................................................................................... 39
Hydraulic Contact/Brake Block ............................................................................................................40
Component Identification ............................................................................................................................................................................. 40
Hydraulic Schematic ......................................................................................................................................................................................... 40
Function .................................................................................................................................................................................................................... 40
Change Displacement Block (HD0218) ................................................................................................42
Component Identification ............................................................................................................................................................................. 42
Specifications ......................................................................................................................................................................................................... 43
Hydraulic Schematic ......................................................................................................................................................................................... 43
Hydraulic Diagrams .............................................................................................................................44
Supply Circuit of Transmission Pumps .................................................................................................................................................. 44
Front and Rear Hydrostatic Circuit ........................................................................................................................................................... 45
Static and Dynamic Brake Circuit .............................................................................................................................................................. 46
Steering System ...................................................................................................................................47
General Representation .................................................................................................................................................................................. 47
Component Identification ............................................................................................................................................................................. 48

1.#
Power Take-Off ....................................................................................................................................49
General Representation .................................................................................................................................................................................. 49
Component Identification ............................................................................................................................................................................. 49
Hydraulic Cooler and Filtered Returns ................................................................................................53
General Representation .................................................................................................................................................................................. 53
Component Identification ............................................................................................................................................................................. 54
Hydraulic Schematic ......................................................................................................................................................................................... 56
Compressed Air Circuit ........................................................................................................................57
Pneumatic Diagram ........................................................................................................................................................................................... 57
Hydraulic Schematic ............................................................................................................................58
4 - Electronics
Localization ............................................................................................................................................................................................................. 59
Electronic Cards ...................................................................................................................................60
Power Card (EA0560) ........................................................................................................................................................................................ 60
Cab Card (EA0554) .............................................................................................................................................................................................. 62
EA0563 ....................................................................................................................................................................................................................... 64
Division Frequency Card (XX0012) ........................................................................................................................................................... 67
Electronic Battery Shut-off (EA0776) ....................................................................................................................................................... 67
Wiring Diagrams ..................................................................................................................................68
General Representation .................................................................................................................................................................................. 68
Power Wiring to the Battery Shut-off ..................................................................................................................................................... 69
Ground Wiring ...................................................................................................................................................................................................... 71
Principle Wiring Harness (EA0604-01) .................................................................................................................................................... 73
Steering Column Wiring Harness (EA0604-04) ................................................................................................................................. 81
Column Harness (EA0647) ............................................................................................................................................................................. 82
Flasher Unit Harness .......................................................................................................................................................................................... 88
Hydraulic, Fuel, and Charge Indicator .................................................................................................................................................... 89
Operator’s Seat Armrest Wiring Harness (EA0604-05) ................................................................................................................. 90
........................................................................................................................................................................................................................................ 94
Computer Wiring Harness (EA0604-02) ................................................................................................................................................ 95
Brake Pedal Harness (EA0604-03) .............................................................................................................................................................. 98
Adaptation Harness (EA0646) ...................................................................................................................................................................100
ECU Wiring Harness (EA0645) ...................................................................................................................................................................112
Outside Box (26031703) ................................................................................................................................................................................114
Headlight Wiring Harness (EA0604-20) ...............................................................................................................................................116
Preheating Command Wiring Harness (EA0604-21) ...................................................................................................................116
Power Relay Command Wiring Harness (EA0648) .......................................................................................................................117
Trailer Socket Wring Harness (EA0604-24) ........................................................................................................................................117
Front Working Lights Wiring Harness (EA0604-25) ......................................................................................................................118
Rear Working Lights Wiring Harness (EA0604-26) ........................................................................................................................118
Outside Mirrors Wiring Harness (EA0604-28) ...................................................................................................................................119
Cab Wiring .............................................................................................................................................................................................................120
Travel Management ......................................................................................................................... 121
Advancement Card XX0014 .......................................................................................................................................................................121
Travel Lever ...........................................................................................................................................................................................................122
Adjusting the Potentiometer .....................................................................................................................................................................124
Sensors ............................................................................................................................................. 126
Engine ......................................................................................................................................................................................................................126
Speed Sensor XX0203 ....................................................................................................................................................................................129

1.#
Connections ...................................................................................................................................... 130
X20 (EA0646/EA0647) .....................................................................................................................................................................................130
X20A (EA0646/EA0647) .................................................................................................................................................................................130
X20B (EA646/EA647) .......................................................................................................................................................................................131
X20C (EA0646/EA0647) .................................................................................................................................................................................132
X27 (EA0646/EA0604-01) .............................................................................................................................................................................132
X27A (EA0646/EA0604-01) ..........................................................................................................................................................................133
X28 (EA0646/EA0604-01) .............................................................................................................................................................................133
X29 (EA0646/EA0604-01) .............................................................................................................................................................................134
X29A (EA0646/EA0604-01) ..........................................................................................................................................................................134
X30 (EA0646/EA0604-01) .............................................................................................................................................................................135
X31 (EA0646/EA0604-03) .............................................................................................................................................................................135
X1 (EA0646/EA0563) .......................................................................................................................................................................................136
X2 (EA0646/EA0563) .......................................................................................................................................................................................136
X30 (EA0645/EA0563) .....................................................................................................................................................................................137
X5 (EA0646/EA0563) .......................................................................................................................................................................................137
X6 (EA0646/EA0563) .......................................................................................................................................................................................137
X7 (EA0644/EA0563) .......................................................................................................................................................................................138
X8 (EA0648/EA0561) .......................................................................................................................................................................................138
X11 (EA0563/EA0561) .....................................................................................................................................................................................138
X13 (EA0563/EA0776) .....................................................................................................................................................................................138
X15 (EA0563/EA0519) .....................................................................................................................................................................................138
EA0645/XX0010 .................................................................................................................................................................................................139
C1 (EA0646/EA0645) .......................................................................................................................................................................................139
EA0645/ECU .........................................................................................................................................................................................................140
C2 (EA0646/EA0644) .......................................................................................................................................................................................142
C3 (EA0644/EA0776) .......................................................................................................................................................................................142
EA0644/XX0013 .................................................................................................................................................................................................142
XX0013/EA0646 .................................................................................................................................................................................................142
C4 (XX0012/EA0646) .......................................................................................................................................................................................143
XX0014/EA0644 .................................................................................................................................................................................................143
XX0014/EA0646 .................................................................................................................................................................................................143
C5 (C5/EA0646) ..................................................................................................................................................................................................143
Buzzer/EA0646 ....................................................................................................................................................................................................144
Starter Relay ..........................................................................................................................................................................................................144
Work Zone Lights Relay .................................................................................................................................................................................144
Manual Speed Override Relay ...................................................................................................................................................................144
Differential Locking Switch .........................................................................................................................................................................145
Reverse Speed Override Relay ..................................................................................................................................................................145
Security Start Neutral Signal Relay ..........................................................................................................................................................145
J1 .................................................................................................................................................................................................................................146
J2 .................................................................................................................................................................................................................................147
J3 .................................................................................................................................................................................................................................148
J4 .................................................................................................................................................................................................................................149
J5 .................................................................................................................................................................................................................................149
J6 .................................................................................................................................................................................................................................150
J7 .................................................................................................................................................................................................................................150
J8 .................................................................................................................................................................................................................................150
J9 .................................................................................................................................................................................................................................151
5 - Gear Motor
Gearbox Overview ............................................................................................................................................................................................153
Planetary Pre-stage ..........................................................................................................................................................................................153
Planetary Mainstage ........................................................................................................................................................................................154
Bearing Unit ..........................................................................................................................................................................................................154
Brake Unit ...............................................................................................................................................................................................................155
Troubleshooting ................................................................................................................................................................................................156
Uncoupling ...........................................................................................................................................................................................................158

1.#
6 - Deutz Display
Connector ..............................................................................................................................................................................................................159
Technical Data ....................................................................................................................................................................................................159
System Menu .................................................................................................................................... 160
Getting to the System Menu .....................................................................................................................................................................160
DEMO .......................................................................................................................................................................................................................160
Restore Defaults .................................................................................................................................................................................................160
COM Viewer ..........................................................................................................................................................................................................161
About ........................................................................................................................................................................................................................161
Clearing Error Memory ...................................................................................................................................................................................161
Error Codes ....................................................................................................................................... 163
7 - Climate Control
General Circuit ....................................................................................................................................................................................................169
Components ........................................................................................................................................................................................................170
Panel Parameter Programming ................................................................................................................................................................175
System Operation .............................................................................................................................................................................................179

1 - Welcome
1
1 - Welcome
Welcome letter
Dear New HARDI® Owner,
Thank you for purchasing your new HARDI® product and welcome to the ever-increasing family of proud HARDI® owners.
HARDI® is the leading sprayer company in offering growers strong, reliable products made for the widest range of
applications worldwide. Quality, reliability, and resale value make the HARDI® product line the preferred product line of
customers both in North America as well as worldwide. Our guiding principle is to provide the highest level of customer
satisfaction and long term value in the marketplace today. We have developed a very high level of customer loyalty in the
marketplace which we are very proud of and strive every day to maintain and to continue to grow.
HARDI® is your specialist in spraying and we spend all of our time and keep all of our focus on spraying. We do not share our
resources between other types of products or compromise on anything in providing the best quality sprayers to the market
today. We can provide the latest in technology with our products if desired, or allow them to operate with the technology
that you already use on other products in most cases. You get to decide that, and what best suits your needs. We feel that
you, our customer, are the best suited to answer that question for your operation. Either way, you decide, and we will try and
help make it happen for you.
Our broad spectrum of product offerings, from the ruggedly simple models we build to our highly sophisticated models,
the built-in HARDI® strength and reliability ensures a low cost of ownership. HARDI® sprayers are all based on a functional
design concept of being as simple to operate as possible and to meet our customers’requirements for all their application
needs.
Please take the time to thoroughly read the Operator’s Manual before using your equipment.You will find many helpful hints
as well as important safety and operation information.
Some of the features on your HARDI® sprayer were suggested by growers. There is no substitute for “on farm”experience
and we invite your comments and suggestions. If any portion of this instruction book remains unclear after reading it,
contact your HARDI® dealer or service personnel for further explanation before using the equipment.
For Product, Service or Warranty Information please contact your local HARDI® dealer.
- Please use the HARDI® Customer Service number: 1-866-770-7063
- Or send your email to [e-mail]
HARDI® NORTH AMERICA INC.
Visit us online at: www.hardi-us.com
1500 West 76th St.
Davenport, Iowa 52806
Phone: [phone]
Fax: [phone]
Sincerely,
Wayne Buchberger
President

1 - Welcome
2

2 - Safety notes
3
Operator safety
Symbols
These symbols are used throughout the book to designate where the reader needs to pay extra attention.
€
This symbol means DANGER. Be very alert as your safety is involved!
±
This symbol means WARNING. Be alert as your safety can be involved!
μ
This symbol means ATTENTION. This guides you to better, easier and safer operation of your sprayer!
÷
This symbol means NOTE.
General info
Before using the sprayer, read the following recommendations and safety instructions.
•Read this instruction book carefully before using the equipment. It is equally important that other operators of this
equipment also read this book.
•If any portion of this instruction book remains unclear after reading it, contact your HARDI® dealer for further
explanation before using the equipment.
•Local law may demand that the operator is certified to use spray equipment. Adhere to the law.
•The driver's seat is the intended working place during operation.
•Wear protective clothing. Clothing may differ according to the plant protection chemicals used. Comply to any
applicable local legislation.
•After spraying, the operator should wash and change his clothes.
•Rinse and wash equipment after use and before servicing. Wash tools if they have become contaminated.
•Do not eat, drink or smoke during the use and maintenance of your sprayer.
•In case of poisoning, immediately seek medical advice. Remember to identify chemicals used. Follow instructions
indicated on the label(s) of the products used.
•Never service or repair the equipment while it is operating.
•Replace all safety devices or shields immediately after servicing.
•Do not go under the machine unless it is secured. The boom is secure when placed in the transport brackets with rear
transport lock engaged.
•Do not attempt to enter the tank.
•Keep children away from the sprayer.
Important guidelines
•Comply with all recommendations for installation, carrying out adjustments, maintenance and repair contained in this
instruction book.
•Use only original spare parts and accessories conforming to the manufacturer's recommendations.
•Do not modify or have your machine and it’s accessories modified by someone else (mechanical, electrical, hydraulic
and pneumatic characteristics) and, more generally, the parts of the machine affecting user safety, without first
requesting written agreement from the manufacturer.
•Failure to respect these rules may make your machine dangerous. In the event of damage or injury, HARDI® shall not
be held liable in any way.
2 - Safety notes

2 - Safety notes
4
Operator's skill
The machine should be used and maintained by people who are aware of its special use and safety characteristics. Before
using your machine, familiarize yourself with all the commands. When working, it will be too late to do so. Ensure that you
have the skills required for protecting crops and the environment, and for handling and spraying plant protection chemicals.
Driving on public roads
When driving on public roads, obey all traffic regulations. Pay particular attention to those regarding mandatory equipment
such as lights, indicators, hazard lights, etc.
You should be aware of the vehicle's size and weight, particularly the overall width and height.
±
WARNING! You must in all circumstances adapt your driving on the road, particularly by reducing your speed during
turns or when road conditions demand. Also reduce speed when meeting or being passed by another vehicle.
Driving in fields
Be very careful to avoid the risk of overturning when driving at speeds
greater than 9 mph (15 km/h) or when driving on a slope.
μ
ATTENTION! As a general rule:
•Adapt your speed and driving to suit the terrain you are driving on.
Be aware and take care!
•Slow down when driving on uneven terrain as the sprayer may become unbalanced and overturn.
•No persons are allowed in the operational area of the sprayer. Take care not to harm people or surroundings when
maneuvering the sprayer, especially while backing up.
•In all circumstances and particularly on uneven and sloping terrain, drive the machine at a low speed, especially on
curves and avoid sudden changes of direction.
•Do not brake or accelerate suddenly when going up or down a slope, bearing in mind the variable volume of liquid in
the sprayer tank.
€
DANGER! Boom maneuvers should be carried out with the sprayer stationary and on flat ground. Ensure that there
are no obstacles nearby (electrical lines, people, poles etc.).
Lights, working at night
If there is insufficient light for working at night, the spraying boom should be equipped with boom lights. For more
information on this equipment, contact your HARDI® dealer.

2 - Safety notes
5
Recommendations to users of crop protection chemicals
This sprayer has been designed and manufactured by HARDI® for the application of crop protection chemicals. For your
safety and the proper functioning of the sprayer, it is important to read and understand all instruction books delivered with
this sprayer.
It is also the sole responsibility of the operator to strictly comply with all recommendations given by the manufacturers of
all crop protection chemicals used with this sprayer.
In particular, it is strongly recommended that any operator of this sprayer:
•Carefully read the label(s) of the manufacturer(s) of the treatment products used with this sprayer and follow the
instructions given (measuring, personal protective equipment, etc.);
•Mix only products whose compatibility was expressly recognized by the manufacturer(s) of the crop protection
chemicals being mixed;
•Avoid introducing air while filling the tank to prevent the formation of foam and cause problems with overflow;
•Follow the manufacturer(s) instructions and warnings for all crop protection chemicals regarding proper storage,
processing and keeping chemicals out of the reach of children and animals;
•Observe all precautions relating to the disposal/recycling of packaging, in accordance with the recommendations of
the manufacturer(s) of the products used;
•Contact the manufacturer(s) of the plant protection product (or their representative) if any doubt remains after reading
the label(s) of their product(s).
Personal safety equipment
Depending on which type of chemical is used, some or all of the following protective
clothing and equipment will be required:
1. Ear muffs
2. Safety goggles or face shield
3. Respirator
4. Chemical resistant coveralls
5. Chemical resistant gloves
6. Chemical resistant boots
Contaminated clothing
Contaminated clothing should be removed and safely stored and laundered. Do not
contaminate the inside of the cab with soiled clothing.
1
2
3
4
5
6

2 - Safety notes
6
Safety decals
It is important that the safety decals remain in place and in good condition. The decals will draw your attention to all the
possible dangers and refer to this instruction manual.
Replace any safety decals that are missing, illegible or damaged.
Clean off any mud or dirt that makes the safety decals illegible.
Mandatory
Read manual
•Read the operator’s manual before operating machine.
•Regularly consult manual for maintenance schedule, instructions, etc.
Remove key
•Remove the ignition key before leaving the cab to perform maintenance.
•Consult operator’s manual before performing maintenance.
Tire maintenance
•The wheel nuts must be re-torqued after the first 2 hours of operation. Then
periodically check that the tires are properly inflated.
Prohibited
Speed limit
•Maximum speed limit while operating the sprayer.
•Extra care must be taken on hills and when cornering.
Engine start
•Never attempt to start engine while outside the cab.
Do not climb
•Do not climb on or off machine.
•Always use ladder and working platform to access the machine.
Do not drink
•Water from the clean water tank is for hand washing, cleaning of clogged nozzles,
etc. This water must never be used for drinking.
3525

2 - Safety notes
7
Danger
Overhead wires
•Take care when operating near wires to prevent entanglement or electrocution.
Fluids under pressure
•Shut down the engine and relieve pressure before performing maintenance.
Danger overhead
•Do not enter paralift area or stand under boom.
Danger from hot surface
•Risk of burns.
Danger from crushing
•Risk of crushing.
Danger from crushing
•Risk of crushing hand.
Danger from radiator
•Risk of injury from fan blades.
•Risk of burns.
Danger from wheel
•Risk of being crushed by wheel.
Danger from machine
•Stay a safe distance from the machine.
Danger of toppling over on hillside or slope
•Drive with extreme caution.
•Widen axle track width to minimize risk.

2 - Safety notes
8
Local poison information center
€
If you live anywhere in the United States, the following toll free number will connect you to your Local Poison
Information Center.
PHONE NO. 1 - 800 - 222 - 1222
€
If you live outside the United States, find the number for the poison control center in your phone book and write it
in the space below:
PHONE NO._______ - _______ - __________
€
Keep a list, in the space provided below, of all the chemicals that you have in use.
1. _______________________________________________________________________________________________
2. _______________________________________________________________________________________________
3. _______________________________________________________________________________________________
4. _______________________________________________________________________________________________
5. _______________________________________________________________________________________________
6. _______________________________________________________________________________________________
7. _______________________________________________________________________________________________
8. _______________________________________________________________________________________________
9. _______________________________________________________________________________________________
10. ______________________________________________________________________________________________

9
Forward Pump
Component Identification
Forward pump
PTO: PTO Pump
VAD: DA cartridge (lock)
X1/X2: Command Pressure
ZH: Adjustment of Hydraulic Zero
R: Air Bleed
ZM: Adjustment of Mechanical Zero
T1: Case Drain or fill port (to valve
block HD0337)
MH: Port for High Pressure Control
(forward /reverse) (M12x150)
S: Charge Pump Supply
B: Reverse Pressure & Flow
3 - Hydraulics

3 - Hydraulics
10
VHP: High Pressure Valve
MA: Measure Port for High Pressure
Valve (M12x150)
DA: Flow Canceling
VLPG: Charge Pump Pressure Valve
VHP: High Pressure Valve/Limiter
Valve (limiting when in reverse)
G: Charge Pump Pressure 435 psi
(30 bar)
ZM: Adjustment of Mechanical Zero
A: Forward Pressure & Flow
÷
Flow canceling at 6526psi (450 bar)
÷
High Pressure Valve set at 5800psi
(400 bar)
High Pressure Valve (HP9302)
1. Adjustment Screw
2. Jamb Nut
Charge Pressure Valve (HPR09434856)
1. Adjustment Screw
2. Jamb Nut
Electric Proportional Control Valve (HPR02053272)
÷
Resistance is above 6.5 ohms.

3 - Hydraulics
11
Testing and Adjusting the Transmission Pump
Charge Pressure Adjustment
1. Prepare the pump
•Connect a 580psi (40 bar) manometer on the G
(charge pressure) port of the pump.
•Connect a 8702psi (600 bar) on MA and MB
÷
Connection for G (use a JIC (SAE 37°) swivel nut run tee ¾”
male x ¾”JIC female, with a manometer connection)
2. Charge Pressure Control
•Start the Engine
•Put the engine at 2400 rpm
•In Neutral, the pressures should be 435psi (30 bar) on every manometer.
•If you need to adjust the Charge Pressure with
the Charge Pressure Valve: Loosen Jamb Nut (2)
and turn Adjustment Screw (1) clockwise to
increase pressure, or turn Adjustment Screw (1)
counterclockwise to decrease pressure, then
tighten Jamb Nut (2).
Pump Pressure
G (Charge Pressure) 435psi (30 bar)
MA (Backward Pressure) 435psi (30 bar)
MB (Forward Pressure) 435psi (30 bar)

3 - Hydraulics
12
Control and Adjustment of the High Pressure Valve
1. Prepare the pump
•Connect A 8702psi (600 bar) manometer on ports
MA (backward pressure) and MB (forward pressure)
of the pump.
•Tighten the flow canceling screw clockwise.
μ
ATTENTION! If the flow canceling screw is not tightened, it is impossible to control the max pressure of the valves.

3 - Hydraulics
13
2. Check and Adjust the High Pressure Valve.
•Start the engine.
•Engage the parking brake.
•Put the lever half forward.
•Run the engine at 2400rpm
•Push the lever forward to control the forward HP valve (port MB)
Forward Pressure
Backward Pressure
•If the pressure is incorrect, adjust the valve.
•To adjust the valve, loosen the jamb nut (2), turn
adjustment screw (1) clockwise to increase the pressure,
or turn adjustment screw (1) counterclockwise to
decrease pressure, then tighten the jamb nut (2).
Pump Pressure
G (Charge Pressure) 435psi (30 bar)
MA (Pressure Backward) 406psi (28 bar)
MB (Pressure Forward) Increase from 435psi to 6526spi (30 bar to 450 bar)
Pump Pressure
G (Charge Pressure) 435psi (30 bar)
MA (Pressure Backward) Increase from 435psi to 6526spi (30 bar to 450 bar)
MB (Pressure Forward) 435psi (30 bar)

3 - Hydraulics
14
3. After adjusting the forward and backward HP valves you will need to adjust the flow canceling screw.
•The flow canceling valve will need to be adjusted to 6526psi (450
bar). To achieve this pressure the adjustment screw will need to be
loosened.
Adjustment of Mechanical Zero
1. Prepare the pump
•Install a hose (as short as possible) between the X1
and X2 ports of the pump.