Garmin Lawn Mower 12 User Guide
about the 1.2/2.0 L Hydraulic Pump  
The 1.2/2.0 L hydraulic pump steers your boat by interacting with the  
hydraulic steering system, based on commands you enter using the  
autopilot display unit. The pump is not included in the autopilot core  
package box because the type of pump you use with your autopilot is  
determined by the size and type of steering system on your boat.  
1.2 and 2.0 L Hydraulic Pump  
Installation Instructions  
To obtain the best performance and to avoid damage to your boat,  
install the Garmin® 1.2/2.0 L hydraulic pump according to the following  
instructions. These instructions are a supplement to the installation  
instructions provided with your Garmin autopilot.  
Hardware needed  
•
1.2/2.0 L pump kit (part number 010-11098-00)  
•
Unbalanced kit (if installing in a boat with an unbalanced steering  
cylinder, part number 010-11201-00)  
Professional installation of the pump is highly recommended, because  
specific knowledge of hydraulic steering componentry is required to  
properly install the pump.  
•
Hydraulic hose with machine-crimpted or field-replaceable fittings  
that have a minimum rating of 1000 lbf/in2.  
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•
•
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Hydraulic fluid  
Read all installation instructions before proceeding with the  
installation. If you experience difficulty during the installation, contact  
Garmin Product Support.  
Thread sealant  
Hydraulic bleeding equipment  
Mounting screws: mounting screws are provided in the pump kit, but  
if the provided screws are not appropriate for the mounting surface,  
you must provide the correct types of screws.  
Registering Your Product  
Help us better support you by completing your online registration today.  
tools needed  
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Go to http://my.garmin.com.  
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Safety glasses  
Keep the original sales receipt, or a photocopy, in a safe place.  
Drill and drill bits  
Contacting Garmin Product Support  
Contact Garmin Product Support if you have any questions about this  
product.  
Wrenches  
Torque wrench (if installing unbalanced kit)  
Wire cutter/strippers  
Screwdrivers: Phillips and flat  
Cable ties  
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In the USA, go to www.garmin.com/support, or contact Garmin  
USA by phone at (913) 397.8200 or (800) 800.1200.  
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In the UK, contact Garmin (Europe) Ltd. by phone at 0808 2380000.  
Marine sealant  
In Europe, go to www.garmin.com/support and click Contact  
Support for in-country support.  
Marine corrosion inhibitor spray  
Pump Installation  
Because every boat is different, care must be taken when planning the  
pump installation.  
Important Safety Information  
‹
waRnInG  
Your are responsible for the safe and prudent operation of your  
vessel. The autopilot is a tool that will enhance your capability to  
operate your boat. It does not relieve you from the responsiblility of  
safely operating your boat. Avoid navigational hazards and never leave  
the helm unattended.  
1. Choose a mounting location (page 1).  
2. Mount the pump (page 2).  
3. Connect the pump to the hydraulic lines (page 2).  
4. Connect the pump to the autopilot ECU (page 2).  
See the Important Safety and Product Information guide in the autopilot  
product box for product warnings and other important information.  
Choosing a Mounting Location  
1. Consult the diagrams on pages 4–6 for connection and dimension  
considerations.  
‹
CautIon  
2. Choose a location to install the pump, considering these guidelines:  
Failure to install and maintain this equipment in accordance with these  
instructions could result in damage or injury.  
•
•
The pump must be located within 19 in. (0.5 m) of the ECU.  
The cables that connect the pump to the ECU cannot be  
extended.  
Always wear safety goggles, ear protection, and a dust mask when  
drilling, cutting, or sanding.  
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•
The pump should be mounted horizontally, if possible.  
If the pump cannot be mounted pump horizontally, it must be  
mounted vertically with the pump head connectors facing up.  
notice  
This equipment should be installed by a qualified marine installer.  
•
The pump must be mounted in a location to which you can  
extend the hydraulic steering lines of the boat.  
This equipment is only for use with Garmin autopilots.  
When drilling or cutting, always check the opposite side of the surface.  
Be aware of fuel tanks, electrical cables, and hydraulic hoses.  
1.2 L and 2.0 L Hydraulic Pump Installation Instructions  
1
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3. If the screws do not protrude the same distance, loosen the shorter  
screw until they protrude the same distance.  
Hydraulic Fluid Bleeding  
notice  
4. Unscrew each screw by two and one-half turns.  
The following is a general procedure for bleeding a hydraulic steering  
system. Refer to the instructions provided by the manufacturer of  
the steering system for more-specific information about bleeding the  
system.  
Engaging and Disengaging the Shutoff Valve  
notice  
When disengaging the shutoff valve, do not force the three brass screws  
past the stopping point. Forcing the screws past the stopping point may  
permanently damage the manifold.  
Before you bleed the hydraulic system, ensure that all hose connections  
are complete and fully tightened.  
Hydraulic Bleeding  
1. Complete an action:  
The 1.2/2.0 L pump features a shutoff valve that isolates the pump from  
the hydraulic system for troubleshooting and repairing the system.  
When the shutoff valve is engaged, the boat steers normally, and the  
autopilot cannot control the steering system. When the shutoff valve is  
engaged, you can remove the pump from the system for repair without  
disconnecting any hydraulic lines.  
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•
If the helm reservoir contains insufficient fluid, fill it with the  
appropriate amount of hydraulic fluid.  
If the helm reservoir contains excess fluid, remove the excess to  
avoid fluid overflow during the bleeding process.  
2. Manually steer the helm to both cylinder stops.  
3. Manually steer the helm fully to port.  
Complete an action:  
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•
To engage the shutoff valve, fully tighten the three screws  
➊.  
4. Open a bypass valve at the cylinder port.  
5. Turn the helm slowly to port for three minutes.  
6. Close the cylinder bypass valve.  
To disengage the shutoff valve, fully loosen the three screws.  
7. Add fluid to the helm reservoir if necessary.  
8. Repeat steps 2 through 7 until the helm reservoir remains full.  
Corrosion Blocker  
notice  
To ensure long life of all parts, apply corrosion blocker to the pump at  
least twice yearly.  
➊
After the pump installation is complete and all hydraulic connections  
and electrical connections are made, apply a marine-rated corrosion  
blocker to the pump.  
Removing the Pump  
Before you remove the pump from the hydraulic system, you must  
engage the shutoff valve (page 3).  
unbalanced Valve Kit  
If your boat has an unbalanced cylinder steering system, you must  
install the optional unbalanced valve kit.  
1. Remove the four socket-head cap screws  
manifold to the pump.  
➊
that connect the  
Installing the unbalanced Valve Kit  
1. Remove the four screws that hold the manifold to the pump body  
and remove the manifold from the pump body.  
2. Replace the o-rings on the pump body with the o-rings supplied in  
the unbalanced kit.  
➊
3. Place the unbalanced valve between the pump body and the  
manifold, with the o-rings on the unbalanced valve facing the  
manifold.  
4. Use the longer screws supplied in the unbalanced kit to connect  
the manifold and unbalanced valve to the pump body. Use thread-  
locking compound, and tighten the screws to 35 lbf-in. (3.95 N-m).  
2. Disconnect the pump from the ECU.  
Calibrating the unbalanced Valve  
3. Remove the pump from its mounting location.  
notice  
Reconnecting the Pump  
1. Mount the pump in its original location.  
Do not unscrew the brass screws more than the specified amount.  
Do not operate the system with the brass screws fully tightened.  
2. Connect the pump to the ECU.  
Before you calibrate the unbalanced valve, you must install the  
unbalanced valve and connect the hydraulic lines. The brass calibration  
screws on the sides of the unbalanced valve adjust the valve.  
3. Connect the manifold to the pump using the four socket-head cap  
screws.  
4. Disengage the shutoff valve (page 3).  
1. Tighten both calibration screws until they stop.  
2. Measure the distance by which each screw protrudes.  
1.2 L and 2.0 L Hydraulic Pump Installation Instructions  
3
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Hydraulic Layouts  
notice  
If the steering system in the boat does not match any of the hydraulic layouts in this manual and you are unsure how to install the pump, contact  
Garmin Product Support.  
Before you start the pump installation, identify the type of hydraulic steering system in your boat. Each boat is different, and you must consider  
certain aspects of the existing hydraulic layout before deciding where to mount the pump.  
Single-Helm without Power assist Layout  
Starboard line  
Return line  
Port line  
➊
➋
➌
➍
➎
➏
➐
➊
➋
➌
➍
Shadow Drive  
Pump  
Helm  
Steering cylinder  
Installation Considerations  
•
•
•
An unbalanced cylinder requires an unbalanced valve  
on the pump.  
The pump must be located within 19 in. (0.5 m) of the  
ECU.  
The cables that connect the pump to the ECU cannot  
be extended.  
➎
•
•
The pump should be mounted horizontally, if possible.  
If the pump cannot be mounted pump horizontally,  
it must be mounted vertically with the pump head  
connectors facing up.  
•
The pump must be in a location to which you can  
extend the hydraulic steering lines of the boat.  
➏
➐
4
1.2 L and 2.0 L Hydraulic Pump Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Dual Helm without Power assist Layout  
➊
➋
➍
➌
➎
➏
➐
➑
Starboard line  
Return line  
Port line  
➊
➋
➌
➍
➎
➏
➐
➑
Shadow Drive  
Pump  
Lower helm  
Upper helm  
Steering cylinder  
Installation Considerations  
•
•
•
•
•
•
An unbalanced cylinder requires an unbalanced valve on the pump.  
The pump must be located within 19 in. (0.5 m) of the ECU.  
The cables that connect the pump to the ECU cannot be extended.  
The pump should be mounted horizontally, if possible.  
If the pump cannot be mounted pump horizontally, it must be mounted vertically with the pump head connectors facing up.  
The pump must be in a location to which you can extend the hydraulic steering lines of the boat.  
1.2 L and 2.0 L Hydraulic Pump Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5
 
Single Helm with Power assist Layout  
Starboard line  
Return line  
➊
➋
➌
➍
➎
➏
➐
➑
➊
➍
➋
➌
Port line  
Shadow Drive  
Helm  
Power assist module  
Pump  
➎
Steering cylinder  
Installation Considerations  
•
An unbalanced cylinder requires an unbalanced valve on the  
pump.  
•
•
The pump must be located within 19 in. (0.5 m) of the ECU.  
➏
The cables that connect the pump to the ECU cannot be  
extended.  
•
•
The pump should be mounted horizontally, if possible.  
If the pump cannot be mounted pump horizontally, it must be  
mounted vertically with the pump head connectors facing up.  
•
•
•
The pump must be in a location to which you can extend the  
hydraulic steering lines of the boat.  
Removal of the power assist module may be necessary to  
gain access to the fittings, hoses, and bleed-tee fitting.  
➐
The pump must be installed between the cylinder and the  
power assist module.  
➑
© 2011 Garmin Ltd. or its subsidiaries  
Garmin International, Inc.  
1200 East 151st Street, Olathe, Kansas 66062, USA  
Garmin (Europe) Ltd.  
Liberty House, Hounsdown Business Park, Southampton, Hampshire, SO40 9LR UK  
Garmin Corporation  
No. 68, Zhangshu 2nd Road, Xizhi Dist., New Taipei City, 221, Taiwan (R.O.C.)  
www.garmin.com  
March 2011  
190-01332-02 Rev. A  
Printed in Taiwan  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 

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