raymarine hydraulic pump installation in stock

I suspect that if you consulted with Sea Star"s support team, you would find that the two capped ports are for an optional hydraulic fluid reservoir and for the additional hydraulic hose from the autopilot"s hydraulic pump shown within the diagram below.

Should no hydraulic fluid reservoir have been installed with your helm pump, then the helm pump would be acting as a limited capacity reservoir for hydraulic fluid. One of the caps which you have referenced will need to be removed to accommodate connecting the additional hydraulic hose from the autopilot"s hydraulic pump.

Regarding the location of the autopilot"s hydraulic pump, best performance will be achieved when the pump has been located in close proximity to the steering ram. The pump"s installation location should also be protected from exposure to moisture associated with rain and waves. However, it should be noted that it sometimes not practical, particularly in smaller boats, to install the autopilot hydraulic pump in very close proximity to the steering ram. In smaller boats, the location of the autopilot hydraulic pump is less important with respect to the performance of the autopilot. However, it is key to ensure that the autopilot hydraulic pump is located at a lower height relative to the helm pump and that the hose is run in a continuously upward direction from the autopilot hydraulic pump to the helm pump.

The Hydraulic oil in a steering system will always contain microscopic air bubbles, these will coalesce and create larger air bubbles over a period of time and will then lead to cavitation within the pump - causing loss of pressure as well as creating excessive noise and possible overheating. It could also lead to the shaft oil seal running dry, hardening and then subsequently leaking.

In addition to the above, the thrust bearing of the pump is not designed to operate in this orientation and will wear excessively leading to possible premature failure.

We would always recommend the pump is mounted with it"s axis horizontal, with the pipe connections exiting at the top, (so do not mount horizontally with the pipes exiting the pump body from the side) . Mounting the pump so that the pipes are connected to the top of the pump body will allow any air built up inside the pump to be expelled back to the reservoir and not interfere with the operation of the pump.

Raymarine Evolution pilots connect to hydraulic steering systems using a rugged hydraulic pump matched to the capacity of the hydraulic steering system. To match an autopilot pump to a steering system, you will need to determine the volume of your steering system"s hydraulic cylinder ram or rams(s) mounted to the rudder on inboard engine boats, or the cylinder mounted to the drive unit on an outboard engine. The hydraulic cylinder ram volume is measured in cubic inches or cubic centimeters. Your steering system documentation should have your steering cylinder volume size. Use the table below to determine which Evolution autopilot pump is a match for your steering ram"s capacity.

The diagram shown within the hydraulic pump installation guide is not intending to imply that the Ts should be installed within the middle of the hydraulic lines. As indicated within the installation guide, performance will be maximized when the pump has been located within close proximity to the steering ram. Installation would typically require that the hydraulic hose be cut to permit the T to be inserted. Many Raymarine dealers (ex. The GPS Store, etc.) offer offers fittings kits to install autopilot hydraulic pumps to various types of hydraulic steering systems. While Raymarine does not produce them, it is conceivable that T fittings could be installed directly to the ram itself.

Distributed by Any reference to Raytheon or RTN in this manual should be interpreted as Raymarine. The names Raytheon and RTN are owned by the Raytheon Company.

Hydraulic Pump Installation Guide Drives covered: M81120 Type 1 Hydraulic Pump 12 V M81119 Type 1 Hydraulic Pump 24 V M81121 Type 2 Hydraulic Pump 12 V M81123 Type 2 Hydraulic Pump 24 V M81122 Type 3 Hydraulic Pump 12 V...

EMC conformance All Raymarine equipment and accessories are designed to the best industry standards for use in the recreational marine environment. The design and manufacture of Raymarine equipment and...

(also known as the Raymarine reversing hydraulic pump). This product is intended to operate the boat’s steering mechanism as part of a Raymarine autopilot system. It is primarily designed for use on boats with an existing hydraulic steering system. Alternatively, you can use this pump on a boat with mechanical steering in conjunction with a secondary steering ram.

Other information Pump dimensions Type 1 (12 V) and Type 2 pumps Figure 2: Type 1 (12 V) and Type 2 pump dimensions Hydraulic Pump - Installation Guide Type 1 (T1) Type 2 (T2) M81120 (12 V) M81121 (12 V)

Hydraulic Pump - Installation Guide Type 3 pump Figure 3: Type 3 pump dimensions Installation instructions Parts required To install this drive you will need: • Parts supplied: • • • Additional parts: • • • Note: Make sure you have obtained these additional parts before you start installation.

Connect to the course computer. Complete the post-installation checks. 1. EMC installation guidelines All Raymarine equipment and accessories are designed to the best industry standards for use in the recreational marine environment. Their design and manufacture conforms to the appropriate...

• Raymarine specified cables are used. Cutting and rejoining these cables can compromise EMC performance and must be avoided unless doing so is detailed in the installation manual.

Connections to other equipment If your Raymarine equipment is to be connected to other equipment using a cable not supplied by Raymarine, a suppression ferrite MUST always be attached to the cable near to the Raymarine unit. 2. Pump mounting Mount the hydraulic pump: •...

Hydraulic Pump - Installation Guide • Try to keep hydraulic fluid loss to a minimum when installing the pump. This will reduce the time and effort required to bleed the system of trapped air after installation: • • WARNING: Before disconnecting any pipes on pressurized systems, you MUST release the pressure at the reservoir by following the manufacturer’s instructions.

Connect the autopilot pump to the steering system as shown in Figure 5. Reservoir pipe Autopilot pump Figure 5: Autopilot pump location for two line systems Hydraulic Pump - Installation Guide Helm pump Check valve (if required) Ram pipes Steering ram...

Hydraulic Pump - Installation Guide Two line pressurized systems Two line pressurized systems have an external pressurized reservoir. This reduces the possibility of introducing air into the system and reduces any steering ‘sponginess’ caused by pipe expansion. Connect the autopilot pump to the steering system as shown in Figure 6.

Connect the autopilot pump to the steering system as shown in Figure 7. Figure 7: Autopilot pump location for three line systems Helm pump Check valve Reservoir pipe Autopilot pump Hydraulic Pump - Installation Guide Ram pipes Steering ram...

Make sure the power supply is switched off before you make any electrical connections. The hydraulic pump has electrical connections for its motor: a red and a black cable. Note: To meet current EMC legislation, you must NOT untwist the pump cables, and you must NOT remove the suppression ferrite.

M81167) across these pipes (as shown in Figure 9). Connect the bypass valve to the CLUTCH terminals on the course • computer using at least 1.5 mm Hydraulic Pump - Installation Guide Cable gauge (AWG) up to 3 m (10 ft)

Hydraulic Pump - Installation Guide Note: Follow the manufacturer’s instructions for mounting the hydraulic ram and reservoir. Figure 9: Connecting to a secondary steering ram 5. Post-installation check WARNING: Keep clear of moving steering systems at all times. Protect moving parts from access during normal use.

Bleeding the system Bleeding the hydraulic system correctly is one of the most important steps when installing the autopilot hydraulic pump. If there is any air in the system the steering will feel spongy, particularly when you turn the wheel to hardover.

Authorized Service Representatives. If you encounter any difficulties with this product, please contact either your national distributor, or your service representative, or the Raymarine Technical Services Call Center. Refer to the back cover or the Worldwide Distributor List for contact details.

Fax +44 (0)23 9269 4642 www.raymarine.com Raymarine Technical Services Call Center UK: +44 (0)23 9271 4713 or +44 (0)23 9269 3611 ext. 1083 Hydraulic Pump - Installation Guide Raymarine Inc 22 Cotton Road, Suite 280 Nashua NH 03063-4219, USA Telephone +1 603 881 5200 Fax +1 603 864 4756 www.raymarine.com...

This Hydraulic Pump is built to operate the steering mechanism of the boat playing an important part in a Raymarine autopilot system. Designed for use on boats with an existing hydraulic steering system or for use in a boat with mechanical steering in conjunction with a secondary steering ram. Built with a precision gear pump and a check valve driven by a servo motor. Type 1 (24v)

This Hydraulic Pump is built to operate the steering mechanism of the boat playing an important part in a Raymarine autopilot system. Designed for use on boats with an existing hydraulic steering system or for use in a boat with mechanical steering in conjunction with a secondary steering ram. Built with a precision gear pump and a check valve driven by a servo motor.

This is a replacement motor for the newer style type 1 hydraulic pumps with the fittings coming out horizontal (if the motor was on a table.) WILL NOT WORK WITH OLDER M81120, only the newest style as is depicted in the pictures in the manual. This comes as shown. NOT A COMPLETE AUTOPILOT PUMP – just a replacement motor assembly.

Notes: In some systems with dual steering rams in parallel, cylinder capacity is the total of both rams. Rams in series only require single capacity valve. Hydraulic steering systems with steering rams over 500cc require our larger constant running pump used in conjunction with the relevant ACU – contact Raymarine for details. An authorized Raymarine dealer is best suited to installing a hydraulic autopilot system. Type 0.5 suitable for Volvo D4/D6 Sterndrive applications.