87039_2.
87039_2.fm Page 2 Wednesday, April 9, 2014 2:56 PM 2 CR Hydraulic Pump - Installation Guide Important information Drives covered M81126 - Raymarine Constant Running Pump (Variable flow) 12V M81128 - Raymarine Constant Running Pump (Variable flow) 24V Safety notices WARNING: Product installation This equipment must be installed and operated in accordance with the instructions contained in this handbook. Failure to do so could result in poor product performance, personal injury and/or damage to your boat.
87039_2.fm Page 3 Wednesday, April 9, 2014 2:56 PM 3 Raymarine equipment and cables connected to it are: • At least 3 ft. (1 m) from any equipment transmitting or cables carrying radio signals e.g. VHF radios, cables and antennas. In the case of SSB radios, the distance should be increased to 7 ft. (2 m). • More than 7 ft. (2 m) from the path of a radar beam. A radar beam can normally be assumed to spread 20 degrees above and below the radiating element.
87039_2.fm Page 4 Wednesday, April 9, 2014 2:56 PM 4 CR Hydraulic Pump - Installation Guide Handbook information To the best of our knowledge, the information in this handbook was correct when it went to press. However, Raymarine cannot accept liability for any inaccuracies or omissions it may contain. In addition, our policy of continuous product improvement may change specifications without notice. As a result, Raymarine cannot accept liability for any differences between the product and the handbook.
87039_2.fm Page 5 Wednesday, April 9, 2014 2:56 PM 5 Introduction Product description Welcome to the installation guide for the Raymarine constant running (CR) hydraulic pump. This product is intended to operate the boat’s steering mechanism as part of a Raymarine autopilot system. The pump provides an ideal drive system for large boats and heavy duty steering applications. It is primarily designed for use on boats with an existing hydraulic steering system.
87039_2.
87039_2.fm Page 7 Wednesday, April 9, 2014 2:56 PM 7 Installation Pump mounting CAUTION: During installation, take care not to knock the CR pump’s mounting feet on any solid structures as the impact may damage the aluminium castings.
7039_2.fm Page 8 Wednesday, April 9, 2014 2:56 PM 8 CR Hydraulic Pump - Installation Guide General guidelines • 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. • The ram ports (A & B) on the CR pump are tapped to 1/4 in (BSP) parallel threaded and the reservoir port (R) is tapped to 3/8 in parallel threaded. Use only bonded rubber or metal washers to seal the fittings.
87039_2.fm Page 9 Wednesday, April 9, 2014 2:56 PM 9 • If the boat has a single helm pump system without check valves, you must incorporate a double pilot check valve (part number: M81166) as shown in Figure 3. • A double pilot check valve may also be necessary on long pipe runs - otherwise pipe expansion may cause poor autopilot performance. Install the check valve as shown in Figure 3.
87039_2.fm Page 10 Wednesday, April 9, 2014 2:56 PM 10 CR Hydraulic Pump - Installation Guide Two line systems Figure 3 shows a typical two line steering system. Hydraulic fluid flows into the ram in either direction, depending on the direction the helm pump rotates.
87039_2.fm Page 11 Wednesday, April 9, 2014 2:56 PM 11 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 below Note: Refer to the manufacturer’s instructions for de-pressurizing and re-pressurizing the system.
87039_2.fm Page 12 Wednesday, April 9, 2014 2:56 PM 12 CR Hydraulic Pump - Installation Guide Three line systems In a three line system, the hydraulic fluid flows in only one direction: • out of the helm pump to the ram • returning from the other side of the ram to the reservoir via a common return line The system will include a check valve block to direct all returned fluid from the ram back to the reservoir.
87039_2.fm Page 13 Wednesday, April 9, 2014 2:56 PM 13 Electrical connections CAUTION: Electrical safety Make sure the power supply is switched off before you make any electrical connections. The CR pump has electrical connections for: • motor supply: two single-core cables • solenoid control valve supply: two plug-in connectors (supplied) • clutch connection: two cables Note: When routing cables, refer to the EMC installation guidelines.
87039_2.fm Page 14 Wednesday, April 9, 2014 2:56 PM 14 CR Hydraulic Pump - Installation Guide Make the following connections: 1. CR pump motor supply: • using appropriate cables connect the CR pump motor to the boat’s power supply, via an appropriate circuit breaker and fuse. (see Table below) Pump motor cable length (distribution panel to pump) Cable gauge Copper area (AWG) (mm2) Fuse Rating 12v CR pumps up to 3 m (10 ft.) up to 7 m (23 ft.) up to 16 m (52 ft.
87039_2.fm Page 15 Wednesday, April 9, 2014 2:56 PM 15 Mechanical steering If you are fitting the pump to a boat with mechanical steering you will need to connect it to a secondary steering ram, along with a solenoid-operated bypass valve (part no. M81167). The bypass valve allows you to switch between autopilot course control and manual steering. To fit to a mechanical steering system: 1. Use suitable hydraulic pipes to connect the pump to the secondary steering ram and a suitable reservoir. 2.
87039_2.fm Page 16 Wednesday, April 9, 2014 2:56 PM 16 CR Hydraulic Pump - Installation Guide Commissioning System Check WARNING: Keep clear of moving steering systems at all times. Protect moving parts from access during normal use. Check the following points after installing the pump: 1. Is the pump installed as close to the steering ram as possible? 2. Is the pump secured to a substantial structure on the boat? 3. Have you connected a third hydraulic pipe between the helm pump and autopilot pump? 4.
87039_2.fm Page 17 Wednesday, April 9, 2014 2:56 PM 17 • you will be able to feel any air in the helm pump: any air in this side of the pump will rise to the helm pump and exhaust into the reservoir • continue until all of the air is out of this side of the pump 2.
87039_2.fm Page 18 Wednesday, April 9, 2014 2:56 PM 18 CR Hydraulic Pump - Installation Guide Set the speed control to achieve the desired hard-over to hard-over time (nominally 12 seconds). To adjust: 1. Loosen the locking nut using an 8mm spanner 2. Adjust the speed control using a flat-blade screwdriver. Screw in to reduce speed. 3.
