Table of Contents
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Constant Running
Hydraulic Pump
Installation Guide
Drives covered:
M81125
Type CR1 (3 L) Constant Running Pump 12 V
M81127
Type CR1 (3 L) Constant Running Pump 24 V
M81126
Type CR2 (4.5 L) Constant Running Pump 12 V
M81128
Type CR2 (4.5 L) Constant Running Pump 24 V
Document number: 81179-3
March 2001
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Summary of Contents for Raymarine Constant Running Hydraulic Pump
- Page 1 Constant Running Hydraulic Pump Installation Guide Drives covered: M81125 Type CR1 (3 L) Constant Running Pump 12 V M81127 Type CR1 (3 L) Constant Running Pump 24 V M81126 Type CR2 (4.5 L) Constant Running Pump 12 V M81128 Type CR2 (4.5 L) Constant Running Pump 24 V Document number: 81179-3 March 2001...
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Page 2: Safety Notices
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... - Page 3 Constant Running Hydraulic Pump - Installation Guide 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.
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Page 4: Pump Specifications
(at 12 V) Peak flow rate (no load) Other information Pump dimensions Figure 2: Pump dimensions Constant Running Hydraulic Pump - Installation Guide Type CR1 M81125 (12 V) M81127 (24 V) 350-500 cc (21-30 in single or double ended... -
Page 5: Installation Instructions
Constant Running Hydraulic Pump - Installation Guide Installation instructions Parts required To install this drive you will need: • Parts supplied: • • • Additional parts: • • • • • Note: Obtain these additional parts before you start installation. -
Page 6: Emc Installation Guidelines
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 Electromagnetic Compatibility (EMC) standards, but correct installation is required to ensure that performance is not compromised. -
Page 7: Suppression Ferrites
Raymarine equipment. Always use the ferrites supplied by Raymarine. 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. -
Page 8: Hydraulic Connections
A set of bleed valves near the steering ram, fitted at the highest point, will allow any air to escape upwards. Constant Running Hydraulic Pump - Installation Guide non-pressurized systems: temporarily fit a non-venting plug to the helm reservoir vent to minimize fluid loss pressurized systems: in BSP. - Page 9 Constant Running Hydraulic Pump - Installation Guide CAUTION: Do not use PTFE tape on hydraulic pipe connections. If necessary use a pipe-sealing compound to ensure a leakproof joint. CAUTION: Before running the pump for the first time, make sure the system contains sufficient hydraulic fluid.
- Page 10 Connect the autopilot pump to the steering system as shown in Figure 3. Reservoir pipe Figure 3: Autopilot pump location for two line systems Constant Running Hydraulic Pump - Installation Guide Helm pump Check valve (if required) CR pump...
- Page 11 Constant Running 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 4.
- Page 12 Connect the autopilot pump to the steering system as shown in Figure 5. Figure 5: Autopilot pump location for three line systems Constant Running Hydraulic Pump - Installation Guide Helm pump Check valve...
- Page 13 Constant Running Hydraulic Pump - Installation Guide 4. Connecting to the course computer WARNING: 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 •...
- Page 14 Figure 6: CR pump connections to a Type 150/400 course computer Connecting to Type 100/300 course computer When installing the CR pump with a Type 100/300 course computer we recommend using a Raymarine constant running (CR) interface (part number: M81129). Connecting the CR interface Run cables from the main power supply to: •...
- Page 15 Constant Running Hydraulic Pump - Installation Guide Supply CR1 (12 V) – 50 A CR1 (24 V) – 30 A CR2 (12 V) – 70 A CR2 (24 V) – 40 A To bypass valve (if required) Motor supply Figure 7: CR pump connections to a Type 100/300 course computer...
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Page 16: Post-Installation Check
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 Constant Running Hydraulic Pump - Installation Guide Secondary steering ram Connect to: CLUTCH terminal on 150/400 course computer... -
Page 17: Maintenance
Constant Running Hydraulic Pump - Installation Guide in the system the steering will feel spongy, particularly when you turn the wheel to hardover. CAUTION: Any air in the hydraulic system will greatly reduce the performance of the autopilot and the overall steering system. -
Page 18: Emc Servicing And Safety Guidelines
Raymarine equipment should be serviced only by authorized Raymarine service technicians. They will ensure that service procedures/ replacement parts used will not affect performance. There are no user serviceable parts in any Raymarine product. • Some products generate high voltages, so never handle the cables or connectors when power is being supplied to the equipment.
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